Merge commit 'v2.6.29-rc1' into perfcounters/core

Conflicts:
	include/linux/kernel_stat.h

54 files changed, 2411 insertions, 2345 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index c602b547cc6e..f5be8081cd81 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -190,7 +190,7 @@ config DIGIEPCA
 
 config ESPSERIAL
 	tristate "Hayes ESP serial port support"
-	depends on SERIAL_NONSTANDARD && ISA && ISA_DMA_API
+	depends on SERIAL_NONSTANDARD && ISA && ISA_DMA_API && BROKEN
 	help
 	  This is a driver which supports Hayes ESP serial ports.  Both single
 	  port cards and multiport cards are supported.  Make sure to read
@@ -443,6 +443,17 @@ config UNIX98_PTYS
 	  All modern Linux systems use the Unix98 ptys.  Say Y unless
 	  you're on an embedded system and want to conserve memory.
 
+config DEVPTS_MULTIPLE_INSTANCES
+	bool "Support multiple instances of devpts"
+	depends on UNIX98_PTYS
+	default n
+	---help---
+	  Enable support for multiple instances of devpts filesystem.
+	  If you want to have isolated PTY namespaces (eg: in containers),
+	  say Y here.  Otherwise, say N. If enabled, each mount of devpts
+	  filesystem with the '-o newinstance' option will create an
+	  independent PTY namespace.
+
 config LEGACY_PTYS
 	bool "Legacy (BSD) PTY support"
 	default y
@@ -605,6 +616,7 @@ config HVC_ISERIES
 	default y
 	select HVC_DRIVER
 	select HVC_IRQ
+	select VIOPATH
 	help
 	  iSeries machines support a hypervisor virtual console.
 
@@ -830,7 +842,7 @@ config JS_RTC
 
 config GEN_RTC
 	tristate "Generic /dev/rtc emulation"
-	depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32
+	depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32 && !BLACKFIN
 	---help---
 	  If you say Y here and create a character special file /dev/rtc with
 	  major number 10 and minor number 135 using mknod ("man mknod"), you
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 9cf6e9bb017e..c7714185f831 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -40,6 +40,8 @@
 #define PCI_DEVICE_ID_INTEL_Q45_IG          0x2E12
 #define PCI_DEVICE_ID_INTEL_G45_HB          0x2E20
 #define PCI_DEVICE_ID_INTEL_G45_IG          0x2E22
+#define PCI_DEVICE_ID_INTEL_G41_HB          0x2E30
+#define PCI_DEVICE_ID_INTEL_G41_IG          0x2E32
 
 /* cover 915 and 945 variants */
 #define IS_I915 (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_E7221_HB || \
@@ -63,7 +65,8 @@
 #define IS_G4X (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IGD_E_HB || \
 		agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_Q45_HB || \
 		agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_G45_HB || \
-		agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_GM45_HB)
+		agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_GM45_HB || \
+		agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_G41_HB)
 
 extern int agp_memory_reserved;
 
@@ -1196,6 +1199,7 @@ static void intel_i965_get_gtt_range(int *gtt_offset, int *gtt_size)
 	case PCI_DEVICE_ID_INTEL_IGD_E_HB:
 	case PCI_DEVICE_ID_INTEL_Q45_HB:
 	case PCI_DEVICE_ID_INTEL_G45_HB:
+	case PCI_DEVICE_ID_INTEL_G41_HB:
 		*gtt_offset = *gtt_size = MB(2);
 		break;
 	default:
@@ -2156,13 +2160,15 @@ static const struct intel_driver_description {
 	{ PCI_DEVICE_ID_INTEL_Q33_HB, PCI_DEVICE_ID_INTEL_Q33_IG, 0, "Q33",
 		NULL, &intel_g33_driver },
 	{ PCI_DEVICE_ID_INTEL_GM45_HB, PCI_DEVICE_ID_INTEL_GM45_IG, 0,
-	    "Mobile Intel? GM45 Express", NULL, &intel_i965_driver },
+	    "Mobile Intel® GM45 Express", NULL, &intel_i965_driver },
 	{ PCI_DEVICE_ID_INTEL_IGD_E_HB, PCI_DEVICE_ID_INTEL_IGD_E_IG, 0,
 	    "Intel Integrated Graphics Device", NULL, &intel_i965_driver },
 	{ PCI_DEVICE_ID_INTEL_Q45_HB, PCI_DEVICE_ID_INTEL_Q45_IG, 0,
 	    "Q45/Q43", NULL, &intel_i965_driver },
 	{ PCI_DEVICE_ID_INTEL_G45_HB, PCI_DEVICE_ID_INTEL_G45_IG, 0,
 	    "G45/G43", NULL, &intel_i965_driver },
+	{ PCI_DEVICE_ID_INTEL_G41_HB, PCI_DEVICE_ID_INTEL_G41_IG, 0,
+	    "G41", NULL, &intel_i965_driver },
 	{ 0, 0, 0, NULL, NULL, NULL }
 };
 
@@ -2360,6 +2366,7 @@ static struct pci_device_id agp_intel_pci_table[] = {
 	ID(PCI_DEVICE_ID_INTEL_IGD_E_HB),
 	ID(PCI_DEVICE_ID_INTEL_Q45_HB),
 	ID(PCI_DEVICE_ID_INTEL_G45_HB),
+	ID(PCI_DEVICE_ID_INTEL_G41_HB),
 	{ }
 };
 
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index b97aebd7aeb8..4e0cfdeab146 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -170,7 +170,7 @@ static __inline__ void rtsdtr_ctrl(int bits)
  */
 static void rs_stop(struct tty_struct *tty)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 	unsigned long flags;
 
 	if (serial_paranoia_check(info, tty->name, "rs_stop"))
@@ -190,7 +190,7 @@ static void rs_stop(struct tty_struct *tty)
 
 static void rs_start(struct tty_struct *tty)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 	unsigned long flags;
 
 	if (serial_paranoia_check(info, tty->name, "rs_start"))
@@ -861,7 +861,7 @@ static int rs_put_char(struct tty_struct *tty, unsigned char ch)
 
 static void rs_flush_chars(struct tty_struct *tty)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 	unsigned long flags;
 
 	if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
@@ -934,7 +934,7 @@ static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count
 
 static int rs_write_room(struct tty_struct *tty)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 
 	if (serial_paranoia_check(info, tty->name, "rs_write_room"))
 		return 0;
@@ -943,7 +943,7 @@ static int rs_write_room(struct tty_struct *tty)
 
 static int rs_chars_in_buffer(struct tty_struct *tty)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 
 	if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
 		return 0;
@@ -952,7 +952,7 @@ static int rs_chars_in_buffer(struct tty_struct *tty)
 
 static void rs_flush_buffer(struct tty_struct *tty)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 	unsigned long flags;
 
 	if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
@@ -969,7 +969,7 @@ static void rs_flush_buffer(struct tty_struct *tty)
  */
 static void rs_send_xchar(struct tty_struct *tty, char ch)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
         unsigned long flags;
 
 	if (serial_paranoia_check(info, tty->name, "rs_send_char"))
@@ -1004,7 +1004,7 @@ static void rs_send_xchar(struct tty_struct *tty, char ch)
  */
 static void rs_throttle(struct tty_struct * tty)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 	unsigned long flags;
 #ifdef SERIAL_DEBUG_THROTTLE
 	char	buf[64];
@@ -1029,7 +1029,7 @@ static void rs_throttle(struct tty_struct * tty)
 
 static void rs_unthrottle(struct tty_struct * tty)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 	unsigned long flags;
 #ifdef SERIAL_DEBUG_THROTTLE
 	char	buf[64];
@@ -1194,7 +1194,7 @@ static int get_lsr_info(struct async_struct * info, unsigned int __user *value)
 
 static int rs_tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct async_struct * info = tty->driver_data;
 	unsigned char control, status;
 	unsigned long flags;
 
@@ -1217,7 +1217,7 @@ static int rs_tiocmget(struct tty_struct *tty, struct file *file)
 static int rs_tiocmset(struct tty_struct *tty, struct file *file,
 		       unsigned int set, unsigned int clear)
 {
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct async_struct * info = tty->driver_data;
 	unsigned long flags;
 
 	if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
@@ -1244,7 +1244,7 @@ static int rs_tiocmset(struct tty_struct *tty, struct file *file,
  */
 static int rs_break(struct tty_struct *tty, int break_state)
 {
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct async_struct * info = tty->driver_data;
 	unsigned long flags;
 
 	if (serial_paranoia_check(info, tty->name, "rs_break"))
@@ -1264,7 +1264,7 @@ static int rs_break(struct tty_struct *tty, int break_state)
 static int rs_ioctl(struct tty_struct *tty, struct file * file,
 		    unsigned int cmd, unsigned long arg)
 {
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct async_struct * info = tty->driver_data;
 	struct async_icount cprev, cnow;	/* kernel counter temps */
 	struct serial_icounter_struct icount;
 	void __user *argp = (void __user *)arg;
@@ -1368,7 +1368,7 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
 
 static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 {
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	struct async_struct *info = tty->driver_data;
 	unsigned long flags;
 	unsigned int cflag = tty->termios->c_cflag;
 
@@ -1428,7 +1428,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
  */
 static void rs_close(struct tty_struct *tty, struct file * filp)
 {
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct async_struct * info = tty->driver_data;
 	struct serial_state *state;
 	unsigned long flags;
 
@@ -1523,7 +1523,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
  */
 static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
 {
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct async_struct * info = tty->driver_data;
 	unsigned long orig_jiffies, char_time;
 	int lsr;
 
@@ -1587,7 +1587,7 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
  */
 static void rs_hangup(struct tty_struct *tty)
 {
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct async_struct * info = tty->driver_data;
 	struct serial_state *state = info->state;
 
 	if (serial_paranoia_check(info, tty->name, "rs_hangup"))
diff --git a/drivers/char/consolemap.c b/drivers/char/consolemap.c
index 4246b8e36cb3..45d3e80156d4 100644
--- a/drivers/char/consolemap.c
+++ b/drivers/char/consolemap.c
@@ -554,7 +554,7 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
 		__get_user(fontpos, &list->fontpos);
 		if ((err1 = con_insert_unipair(p, unicode,fontpos)) != 0)
 			err = err1;
-			list++;
+		list++;
 	}
 	
 	if (con_unify_unimap(vc, p))
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 5e5b1dc1a0a7..6a59f72a9c21 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -5010,7 +5010,7 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev,
 		if (nchan == 0) {
 			dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
 					"Serial-Modules\n");
-			return -EIO;
+			goto err_unmap;
 		}
 	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
 		struct RUNTIME_9060 __iomem *ctl_addr;
diff --git a/drivers/char/ds1620.c b/drivers/char/ds1620.c
index 74e9cd81b5b2..61f0146e215d 100644
--- a/drivers/char/ds1620.c
+++ b/drivers/char/ds1620.c
@@ -43,52 +43,51 @@ static const char *fan_state[] = { "off", "on", "on (hardwired)" };
  *  chance that the WaveArtist driver could touch these bits to
  *  enable or disable the speaker.
  */
-extern spinlock_t gpio_lock;
 extern unsigned int system_rev;
 
 static inline void netwinder_ds1620_set_clk(int clk)
 {
-	gpio_modify_op(GPIO_DSCLK, clk ? GPIO_DSCLK : 0);
+	nw_gpio_modify_op(GPIO_DSCLK, clk ? GPIO_DSCLK : 0);
 }
 
 static inline void netwinder_ds1620_set_data(int dat)
 {
-	gpio_modify_op(GPIO_DATA, dat ? GPIO_DATA : 0);
+	nw_gpio_modify_op(GPIO_DATA, dat ? GPIO_DATA : 0);
 }
 
 static inline int netwinder_ds1620_get_data(void)
 {
-	return gpio_read() & GPIO_DATA;
+	return nw_gpio_read() & GPIO_DATA;
 }
 
 static inline void netwinder_ds1620_set_data_dir(int dir)
 {
-	gpio_modify_io(GPIO_DATA, dir ? GPIO_DATA : 0);
+	nw_gpio_modify_io(GPIO_DATA, dir ? GPIO_DATA : 0);
 }
 
 static inline void netwinder_ds1620_reset(void)
 {
-	cpld_modify(CPLD_DS_ENABLE, 0);
-	cpld_modify(CPLD_DS_ENABLE, CPLD_DS_ENABLE);
+	nw_cpld_modify(CPLD_DS_ENABLE, 0);
+	nw_cpld_modify(CPLD_DS_ENABLE, CPLD_DS_ENABLE);
 }
 
 static inline void netwinder_lock(unsigned long *flags)
 {
-	spin_lock_irqsave(&gpio_lock, *flags);
+	spin_lock_irqsave(&nw_gpio_lock, *flags);
 }
 
 static inline void netwinder_unlock(unsigned long *flags)
 {
-	spin_unlock_irqrestore(&gpio_lock, *flags);
+	spin_unlock_irqrestore(&nw_gpio_lock, *flags);
 }
 
 static inline void netwinder_set_fan(int i)
 {
 	unsigned long flags;
 
-	spin_lock_irqsave(&gpio_lock, flags);
-	gpio_modify_op(GPIO_FAN, i ? GPIO_FAN : 0);
-	spin_unlock_irqrestore(&gpio_lock, flags);
+	spin_lock_irqsave(&nw_gpio_lock, flags);
+	nw_gpio_modify_op(GPIO_FAN, i ? GPIO_FAN : 0);
+	spin_unlock_irqrestore(&nw_gpio_lock, flags);
 }
 
 static inline int netwinder_get_fan(void)
@@ -96,7 +95,7 @@ static inline int netwinder_get_fan(void)
 	if ((system_rev & 0xf000) == 0x4000)
 		return FAN_ALWAYS_ON;
 
-	return (gpio_read() & GPIO_FAN) ? FAN_ON : FAN_OFF;
+	return (nw_gpio_read() & GPIO_FAN) ? FAN_ON : FAN_OFF;
 }
 
 /*
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index cf2461d34e5f..af7c13ca9493 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -69,7 +69,9 @@ static int invalid_lilo_config;
 
 /*
  * The ISA boards do window flipping into the same spaces so its only sane with
- * a single lock. It's still pretty efficient.
+ * a single lock. It's still pretty efficient. This lock guards the hardware
+ * and the tty_port lock guards the kernel side stuff like use counts. Take
+ * this lock inside the port lock if you must take both.
  */
 static DEFINE_SPINLOCK(epca_lock);
 
@@ -156,14 +158,12 @@ static struct channel *verifyChannel(struct tty_struct *);
 static void pc_sched_event(struct channel *, int);
 static void epca_error(int, char *);
 static void pc_close(struct tty_struct *, struct file *);
-static void shutdown(struct channel *);
+static void shutdown(struct channel *, struct tty_struct *tty);
 static void pc_hangup(struct tty_struct *);
 static int pc_write_room(struct tty_struct *);
 static int pc_chars_in_buffer(struct tty_struct *);
 static void pc_flush_buffer(struct tty_struct *);
 static void pc_flush_chars(struct tty_struct *);
-static int block_til_ready(struct tty_struct *, struct file *,
-			struct channel *);
 static int pc_open(struct tty_struct *, struct file *);
 static void post_fep_init(unsigned int crd);
 static void epcapoll(unsigned long);
@@ -173,7 +173,7 @@ static unsigned termios2digi_h(struct channel *ch, unsigned);
 static unsigned termios2digi_i(struct channel *ch, unsigned);
 static unsigned termios2digi_c(struct channel *ch, unsigned);
 static void epcaparam(struct tty_struct *, struct channel *);
-static void receive_data(struct channel *);
+static void receive_data(struct channel *, struct tty_struct *tty);
 static int pc_ioctl(struct tty_struct *, struct file *,
 			unsigned int, unsigned long);
 static int info_ioctl(struct tty_struct *, struct file *,
@@ -392,7 +392,7 @@ static struct channel *verifyChannel(struct tty_struct *tty)
 	 * through tty->driver_data this should catch it.
 	 */
 	if (tty) {
-		struct channel *ch = (struct channel *)tty->driver_data;
+		struct channel *ch = tty->driver_data;
 		if (ch >= &digi_channels[0] && ch < &digi_channels[nbdevs]) {
 			if (ch->magic == EPCA_MAGIC)
 				return ch;
@@ -419,76 +419,34 @@ static void epca_error(int line, char *msg)
 static void pc_close(struct tty_struct *tty, struct file *filp)
 {
 	struct channel *ch;
-	unsigned long flags;
+	struct tty_port *port;
 	/*
 	 * verifyChannel returns the channel from the tty struct if it is
 	 * valid. This serves as a sanity check.
 	 */
 	ch = verifyChannel(tty);
-	if (ch != NULL) {
-		spin_lock_irqsave(&epca_lock, flags);
-		if (tty_hung_up_p(filp)) {
-			spin_unlock_irqrestore(&epca_lock, flags);
-			return;
-		}
-		if (ch->port.count-- > 1)  {
-			/* Begin channel is open more than once */
-			/*
-			 * Return without doing anything. Someone might still
-			 * be using the channel.
-			 */
-			spin_unlock_irqrestore(&epca_lock, flags);
-			return;
-		}
-		/* Port open only once go ahead with shutdown & reset */
-		BUG_ON(ch->port.count < 0);
-
-		/*
-		 * Let the rest of the driver know the channel is being closed.
-		 * This becomes important if an open is attempted before close
-		 * is finished.
-		 */
-		ch->port.flags |= ASYNC_CLOSING;
-		tty->closing = 1;
-
-		spin_unlock_irqrestore(&epca_lock, flags);
-
-		if (ch->port.flags & ASYNC_INITIALIZED)  {
-			/* Setup an event to indicate when the
-			   transmit buffer empties */
-			setup_empty_event(tty, ch);
-			/* 30 seconds timeout */
-			tty_wait_until_sent(tty, 3000);
-		}
-		pc_flush_buffer(tty);
+	if (ch == NULL)
+		return;
+	port = &ch->port;
 
-		tty_ldisc_flush(tty);
-		shutdown(ch);
+	if (tty_port_close_start(port, tty, filp) == 0)
+		return;
 
-		spin_lock_irqsave(&epca_lock, flags);
-		tty->closing = 0;
-		ch->event = 0;
-		ch->port.tty = NULL;
-		spin_unlock_irqrestore(&epca_lock, flags);
+	pc_flush_buffer(tty);
+	shutdown(ch, tty);
 
-		if (ch->port.blocked_open) {
-			if (ch->close_delay)
-				msleep_interruptible(jiffies_to_msecs(ch->close_delay));
-			wake_up_interruptible(&ch->port.open_wait);
-		}
-		ch->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
-					ASYNC_CLOSING);
-		wake_up_interruptible(&ch->port.close_wait);
-	}
+	tty_port_close_end(port, tty);
+	ch->event = 0;	/* FIXME: review ch->event locking */
+	tty_port_tty_set(port, NULL);
 }
 
-static void shutdown(struct channel *ch)
+static void shutdown(struct channel *ch, struct tty_struct *tty)
 {
 	unsigned long flags;
-	struct tty_struct *tty;
 	struct board_chan __iomem *bc;
+	struct tty_port *port = &ch->port;
 
-	if (!(ch->port.flags & ASYNC_INITIALIZED))
+	if (!(port->flags & ASYNC_INITIALIZED))
 		return;
 
 	spin_lock_irqsave(&epca_lock, flags);
@@ -503,7 +461,6 @@ static void shutdown(struct channel *ch)
 	 */
 	if (bc)
 		writeb(0, &bc->idata);
-	tty = ch->port.tty;
 
 	/* If we're a modem control device and HUPCL is on, drop RTS & DTR. */
 	if (tty->termios->c_cflag & HUPCL)  {
@@ -517,32 +474,26 @@ static void shutdown(struct channel *ch)
 	 * will have to reinitialized. Set a flag to indicate this.
 	 */
 	/* Prevent future Digi programmed interrupts from coming active */
-	ch->port.flags &= ~ASYNC_INITIALIZED;
+	port->flags &= ~ASYNC_INITIALIZED;
 	spin_unlock_irqrestore(&epca_lock, flags);
 }
 
 static void pc_hangup(struct tty_struct *tty)
 {
 	struct channel *ch;
+
 	/*
 	 * verifyChannel returns the channel from the tty struct if it is
 	 * valid. This serves as a sanity check.
 	 */
 	ch = verifyChannel(tty);
 	if (ch != NULL) {
-		unsigned long flags;
-
 		pc_flush_buffer(tty);
 		tty_ldisc_flush(tty);
-		shutdown(ch);
+		shutdown(ch, tty);
 
-		spin_lock_irqsave(&epca_lock, flags);
-		ch->port.tty   = NULL;
-		ch->event = 0;
-		ch->port.count = 0;
-		ch->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
-		spin_unlock_irqrestore(&epca_lock, flags);
-		wake_up_interruptible(&ch->port.open_wait);
+		ch->event = 0;	/* FIXME: review locking of ch->event */
+		tty_port_hangup(&ch->port);
 	}
 }
 
@@ -786,100 +737,22 @@ static void pc_flush_chars(struct tty_struct *tty)
 	}
 }
 
-static int block_til_ready(struct tty_struct *tty,
-				struct file *filp, struct channel *ch)
+static int epca_carrier_raised(struct tty_port *port)
 {
-	DECLARE_WAITQUEUE(wait, current);
-	int retval, do_clocal = 0;
-	unsigned long flags;
-
-	if (tty_hung_up_p(filp)) {
-		if (ch->port.flags & ASYNC_HUP_NOTIFY)
-			retval = -EAGAIN;
-		else
-			retval = -ERESTARTSYS;
-		return retval;
-	}
-
-	/*
-	 * If the device is in the middle of being closed, then block until
-	 * it's done, and then try again.
-	 */
-	if (ch->port.flags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&ch->port.close_wait);
-
-		if (ch->port.flags & ASYNC_HUP_NOTIFY)
-			return -EAGAIN;
-		else
-			return -ERESTARTSYS;
-	}
-
-	if (filp->f_flags & O_NONBLOCK)  {
-		/*
-		 * If non-blocking mode is set, then make the check up front
-		 * and then exit.
-		 */
-		ch->port.flags |= ASYNC_NORMAL_ACTIVE;
-		return 0;
-	}
-	if (tty->termios->c_cflag & CLOCAL)
-		do_clocal = 1;
-	/* Block waiting for the carrier detect and the line to become free */
-
-	retval = 0;
-	add_wait_queue(&ch->port.open_wait, &wait);
-
-	spin_lock_irqsave(&epca_lock, flags);
-	/* We dec count so that pc_close will know when to free things */
-	if (!tty_hung_up_p(filp))
-		ch->port.count--;
-	ch->port.blocked_open++;
-	while (1) {
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) ||
-				!(ch->port.flags & ASYNC_INITIALIZED)) {
-			if (ch->port.flags & ASYNC_HUP_NOTIFY)
-				retval = -EAGAIN;
-			else
-				retval = -ERESTARTSYS;
-			break;
-		}
-		if (!(ch->port.flags & ASYNC_CLOSING) &&
-			  (do_clocal || (ch->imodem & ch->dcd)))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-		spin_unlock_irqrestore(&epca_lock, flags);
-		/*
-		 * Allow someone else to be scheduled. We will occasionally go
-		 * through this loop until one of the above conditions change.
-		 * The below schedule call will allow other processes to enter
-		 * and prevent this loop from hogging the cpu.
-		 */
-		schedule();
-		spin_lock_irqsave(&epca_lock, flags);
-	}
-
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&ch->port.open_wait, &wait);
-	if (!tty_hung_up_p(filp))
-		ch->port.count++;
-	ch->port.blocked_open--;
-
-	spin_unlock_irqrestore(&epca_lock, flags);
-
-	if (retval)
-		return retval;
-
-	ch->port.flags |= ASYNC_NORMAL_ACTIVE;
+	struct channel *ch = container_of(port, struct channel, port);
+	if (ch->imodem & ch->dcd)
+		return 1;
 	return 0;
 }
 
+static void epca_raise_dtr_rts(struct tty_port *port)
+{
+}
+
 static int pc_open(struct tty_struct *tty, struct file *filp)
 {
 	struct channel *ch;
+	struct tty_port *port;
 	unsigned long flags;
 	int line, retval, boardnum;
 	struct board_chan __iomem *bc;
@@ -890,12 +763,13 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
 		return -ENODEV;
 
 	ch = &digi_channels[line];
+	port = &ch->port;
 	boardnum = ch->boardnum;
 
 	/* Check status of board configured in system.  */
 
 	/*
-	 * I check to see if the epca_setup routine detected an user error. It
+	 * I check to see if the epca_setup routine detected a user error. It
 	 * might be better to put this in pc_init, but for the moment it goes
 	 * here.
 	 */
@@ -926,22 +800,24 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
 		return -ENODEV;
 	}
 
-	spin_lock_irqsave(&epca_lock, flags);
+	spin_lock_irqsave(&port->lock, flags);
 	/*
 	 * Every time a channel is opened, increment a counter. This is
 	 * necessary because we do not wish to flush and shutdown the channel
 	 * until the last app holding the channel open, closes it.
 	 */
-	ch->port.count++;
+	port->count++;
 	/*
 	 * Set a kernel structures pointer to our local channel structure. This
 	 * way we can get to it when passed only a tty struct.
 	 */
 	tty->driver_data = ch;
+	port->tty = tty;
 	/*
 	 * If this is the first time the channel has been opened, initialize
 	 * the tty->termios struct otherwise let pc_close handle it.
 	 */
+	spin_lock(&epca_lock);
 	globalwinon(ch);
 	ch->statusflags = 0;
 
@@ -956,31 +832,33 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
 	writew(head, &bc->rout);
 
 	/* Set the channels associated tty structure */
-	ch->port.tty = tty;
 
 	/*
 	 * The below routine generally sets up parity, baud, flow control
 	 * issues, etc.... It effect both control flags and input flags.
 	 */
 	epcaparam(tty, ch);
-	ch->port.flags |= ASYNC_INITIALIZED;
 	memoff(ch);
-	spin_unlock_irqrestore(&epca_lock, flags);
+	spin_unlock(&epca_lock);
+	port->flags |= ASYNC_INITIALIZED;
+	spin_unlock_irqrestore(&port->lock, flags);
 
-	retval = block_til_ready(tty, filp, ch);
+	retval = tty_port_block_til_ready(port, tty, filp);
 	if (retval)
 		return retval;
 	/*
 	 * Set this again in case a hangup set it to zero while this open() was
 	 * waiting for the line...
 	 */
-	spin_lock_irqsave(&epca_lock, flags);
-	ch->port.tty = tty;
+	spin_lock_irqsave(&port->lock, flags);
+	port->tty = tty;
+	spin_lock(&epca_lock);
 	globalwinon(ch);
 	/* Enable Digi Data events */
 	writeb(1, &bc->idata);
 	memoff(ch);
-	spin_unlock_irqrestore(&epca_lock, flags);
+	spin_unlock(&epca_lock);
+	spin_unlock_irqrestore(&port->lock, flags);
 	return 0;
 }
 
@@ -1016,8 +894,11 @@ static void __exit epca_module_exit(void)
 		}
 		ch = card_ptr[crd];
 		for (count = 0; count < bd->numports; count++, ch++) {
-			if (ch && ch->port.tty)
-				tty_hangup(ch->port.tty);
+			struct tty_struct *tty = tty_port_tty_get(&ch->port);
+			if (tty) {
+				tty_hangup(tty);
+				tty_kref_put(tty);
+			}
 		}
 	}
 	pci_unregister_driver(&epca_driver);
@@ -1042,6 +923,11 @@ static const struct tty_operations pc_ops = {
 	.break_ctl = pc_send_break
 };
 
+static const struct tty_port_operations epca_port_ops = {
+	.carrier_raised = epca_carrier_raised,
+	.raise_dtr_rts = epca_raise_dtr_rts,
+};
+
 static int info_open(struct tty_struct *tty, struct file *filp)
 {
 	return 0;
@@ -1377,6 +1263,7 @@ static void post_fep_init(unsigned int crd)
 		u16 tseg, rseg;
 
 		tty_port_init(&ch->port);
+		ch->port.ops = &epca_port_ops;
 		ch->brdchan = bc;
 		ch->mailbox = gd;
 		INIT_WORK(&ch->tqueue, do_softint);
@@ -1428,7 +1315,7 @@ static void post_fep_init(unsigned int crd)
 		ch->boardnum   = crd;
 		ch->channelnum = i;
 		ch->magic      = EPCA_MAGIC;
-		ch->port.tty        = NULL;
+		tty_port_tty_set(&ch->port, NULL);
 
 		if (shrinkmem) {
 			fepcmd(ch, SETBUFFER, 32, 0, 0, 0);
@@ -1510,7 +1397,7 @@ static void post_fep_init(unsigned int crd)
 		ch->fepstartca = 0;
 		ch->fepstopca = 0;
 
-		ch->close_delay = 50;
+		ch->port.close_delay = 50;
 
 		spin_unlock_irqrestore(&epca_lock, flags);
 	}
@@ -1622,15 +1509,16 @@ static void doevent(int crd)
 		if (bc == NULL)
 			goto next;
 
+		tty = tty_port_tty_get(&ch->port);
 		if (event & DATA_IND)  { /* Begin DATA_IND */
-			receive_data(ch);
+			receive_data(ch, tty);
 			assertgwinon(ch);
 		} /* End DATA_IND */
 		/* else *//* Fix for DCD transition missed bug */
 		if (event & MODEMCHG_IND) {
 			/* A modem signal change has been indicated */
 			ch->imodem = mstat;
-			if (ch->port.flags & ASYNC_CHECK_CD) {
+			if (test_bit(ASYNC_CHECK_CD, &ch->port.flags)) {
 				/* We are now receiving dcd */
 				if (mstat & ch->dcd)
 					wake_up_interruptible(&ch->port.open_wait);
@@ -1638,7 +1526,6 @@ static void doevent(int crd)
 					pc_sched_event(ch, EPCA_EVENT_HANGUP);
 			}
 		}
-		tty = ch->port.tty;
 		if (tty) {
 			if (event & BREAK_IND) {
 				/* A break has been indicated */
@@ -1658,6 +1545,7 @@ static void doevent(int crd)
 					tty_wakeup(tty);
 				}
 			}
+			tty_kref_put(tty);
 		}
 next:
 		globalwinon(ch);
@@ -1877,9 +1765,9 @@ static void epcaparam(struct tty_struct *tty, struct channel *ch)
 		 * that the driver will wait on carrier detect.
 		 */
 		if (ts->c_cflag & CLOCAL)
-			ch->port.flags &= ~ASYNC_CHECK_CD;
+			clear_bit(ASYNC_CHECK_CD, &ch->port.flags);
 		else
-			ch->port.flags |= ASYNC_CHECK_CD;
+			set_bit(ASYNC_CHECK_CD, &ch->port.flags);
 		mval = ch->m_dtr | ch->m_rts;
 	} /* End CBAUD not detected */
 	iflag = termios2digi_i(ch, ts->c_iflag);
@@ -1952,11 +1840,10 @@ static void epcaparam(struct tty_struct *tty, struct channel *ch)
 }
 
 /* Caller holds lock */
-static void receive_data(struct channel *ch)
+static void receive_data(struct channel *ch, struct tty_struct *tty)
 {
 	unchar *rptr;
 	struct ktermios *ts = NULL;
-	struct tty_struct *tty;
 	struct board_chan __iomem *bc;
 	int dataToRead, wrapgap, bytesAvailable;
 	unsigned int tail, head;
@@ -1969,7 +1856,6 @@ static void receive_data(struct channel *ch)
 	globalwinon(ch);
 	if (ch->statusflags & RXSTOPPED)
 		return;
-	tty = ch->port.tty;
 	if (tty)
 		ts = tty->termios;
 	bc = ch->brdchan;
@@ -2029,7 +1915,7 @@ static void receive_data(struct channel *ch)
 	globalwinon(ch);
 	writew(tail, &bc->rout);
 	/* Must be called with global data */
-	tty_schedule_flip(ch->port.tty);
+	tty_schedule_flip(tty);
 }
 
 static int info_ioctl(struct tty_struct *tty, struct file *file,
@@ -2097,7 +1983,7 @@ static int info_ioctl(struct tty_struct *tty, struct file *file,
 
 static int pc_tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct channel *ch = (struct channel *) tty->driver_data;
+	struct channel *ch = tty->driver_data;
 	struct board_chan __iomem *bc;
 	unsigned int mstat, mflag = 0;
 	unsigned long flags;
@@ -2131,7 +2017,7 @@ static int pc_tiocmget(struct tty_struct *tty, struct file *file)
 static int pc_tiocmset(struct tty_struct *tty, struct file *file,
 		       unsigned int set, unsigned int clear)
 {
-	struct channel *ch = (struct channel *) tty->driver_data;
+	struct channel *ch = tty->driver_data;
 	unsigned long flags;
 
 	if (!ch)
@@ -2178,7 +2064,7 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file,
 	unsigned int mflag, mstat;
 	unsigned char startc, stopc;
 	struct board_chan __iomem *bc;
-	struct channel *ch = (struct channel *) tty->driver_data;
+	struct channel *ch = tty->driver_data;
 	void __user *argp = (void __user *)arg;
 
 	if (ch)
@@ -2352,15 +2238,16 @@ static void do_softint(struct work_struct *work)
 	struct channel *ch = container_of(work, struct channel, tqueue);
 	/* Called in response to a modem change event */
 	if (ch && ch->magic == EPCA_MAGIC) {
-		struct tty_struct *tty = ch->port.tty;
+		struct tty_struct *tty = tty_port_tty_get(&ch->port);;
 
 		if (tty && tty->driver_data) {
 			if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) {
 				tty_hangup(tty);
 				wake_up_interruptible(&ch->port.open_wait);
-				ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+				clear_bit(ASYNC_NORMAL_ACTIVE, &ch->port.flags);
 			}
 		}
+		tty_kref_put(tty);
 	}
 }
 
@@ -2473,7 +2360,7 @@ static void pc_unthrottle(struct tty_struct *tty)
 
 static int pc_send_break(struct tty_struct *tty, int msec)
 {
-	struct channel *ch = (struct channel *) tty->driver_data;
+	struct channel *ch = tty->driver_data;
 	unsigned long flags;
 
 	if (msec == -1)
diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index 7f077c0097f6..45ec263ec012 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -2054,6 +2054,15 @@ static void esp_hangup(struct tty_struct *tty)
 	wake_up_interruptible(&info->port.open_wait);
 }
 
+static int esp_carrier_raised(struct tty_port *port)
+{
+	struct esp_struct *info = container_of(port, struct esp_struct, port);
+	serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
+	if (serial_in(info, UART_ESI_STAT2) & UART_MSR_DCD)
+		return 1;
+	return 0;
+}
+
 /*
  * ------------------------------------------------------------
  * esp_open() and friends
@@ -2066,17 +2075,19 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	int		retval;
 	int		do_clocal = 0;
 	unsigned long	flags;
+	int		cd;
+	struct tty_port *port = &info->port;
 
 	/*
 	 * If the device is in the middle of being closed, then block
 	 * until it's done, and then try again.
 	 */
 	if (tty_hung_up_p(filp) ||
-	    (info->port.flags & ASYNC_CLOSING)) {
-		if (info->port.flags & ASYNC_CLOSING)
-			interruptible_sleep_on(&info->port.close_wait);
+	    (port->flags & ASYNC_CLOSING)) {
+		if (port->flags & ASYNC_CLOSING)
+			interruptible_sleep_on(&port->close_wait);
 #ifdef SERIAL_DO_RESTART
-		if (info->port.flags & ASYNC_HUP_NOTIFY)
+		if (port->flags & ASYNC_HUP_NOTIFY)
 			return -EAGAIN;
 		else
 			return -ERESTARTSYS;
@@ -2091,7 +2102,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	 */
 	if ((filp->f_flags & O_NONBLOCK) ||
 	    (tty->flags & (1 << TTY_IO_ERROR))) {
-		info->port.flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 
@@ -2101,20 +2112,20 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	/*
 	 * Block waiting for the carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, info->port.count is dropped by one, so that
+	 * this loop, port->count is dropped by one, so that
 	 * rs_close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 	retval = 0;
-	add_wait_queue(&info->port.open_wait, &wait);
+	add_wait_queue(&port->open_wait, &wait);
 #ifdef SERIAL_DEBUG_OPEN
 	printk(KERN_DEBUG "block_til_ready before block: ttys%d, count = %d\n",
-	       info->line, info->port.count);
+	       info->line, port->count);
 #endif
 	spin_lock_irqsave(&info->lock, flags);
 	if (!tty_hung_up_p(filp))
-		info->port.count--;
-	info->port.blocked_open++;
+		port->count--;
+	port->blocked_open++;
 	while (1) {
 		if ((tty->termios->c_cflag & CBAUD)) {
 			unsigned int scratch;
@@ -2129,9 +2140,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 		}
 		set_current_state(TASK_INTERRUPTIBLE);
 		if (tty_hung_up_p(filp) ||
-		    !(info->port.flags & ASYNC_INITIALIZED)) {
+		    !(port->flags & ASYNC_INITIALIZED)) {
 #ifdef SERIAL_DO_RESTART
-			if (info->port.flags & ASYNC_HUP_NOTIFY)
+			if (port->flags & ASYNC_HUP_NOTIFY)
 				retval = -EAGAIN;
 			else
 				retval = -ERESTARTSYS;
@@ -2141,11 +2152,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 			break;
 		}
 
-		serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
-		if (serial_in(info, UART_ESI_STAT2) & UART_MSR_DCD)
-			do_clocal = 1;
+		cd = tty_port_carrier_raised(port);
 
-		if (!(info->port.flags & ASYNC_CLOSING) &&
+		if (!(port->flags & ASYNC_CLOSING) &&
 		    (do_clocal))
 			break;
 		if (signal_pending(current)) {
@@ -2154,25 +2163,25 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 		}
 #ifdef SERIAL_DEBUG_OPEN
 		printk(KERN_DEBUG "block_til_ready blocking: ttys%d, count = %d\n",
-		       info->line, info->port.count);
+		       info->line, port->count);
 #endif
 		spin_unlock_irqrestore(&info->lock, flags);
 		schedule();
 		spin_lock_irqsave(&info->lock, flags);
 	}
 	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->port.open_wait, &wait);
+	remove_wait_queue(&port->open_wait, &wait);
 	if (!tty_hung_up_p(filp))
-		info->port.count++;
-	info->port.blocked_open--;
+		port->count++;
+	port->blocked_open--;
 	spin_unlock_irqrestore(&info->lock, flags);
 #ifdef SERIAL_DEBUG_OPEN
 	printk(KERN_DEBUG "block_til_ready after blocking: ttys%d, count = %d\n",
-	       info->line, info->port.count);
+	       info->line, port->count);
 #endif
 	if (retval)
 		return retval;
-	info->port.flags |= ASYNC_NORMAL_ACTIVE;
+	port->flags |= ASYNC_NORMAL_ACTIVE;
 	return 0;
 }
 
@@ -2329,6 +2338,10 @@ static const struct tty_operations esp_ops = {
 	.tiocmset = esp_tiocmset,
 };
 
+static const struct tty_port_operations esp_port_ops = {
+	.esp_carrier_raised,
+};
+
 /*
  * The serial driver boot-time initialization code!
  */
@@ -2415,6 +2428,8 @@ static int __init espserial_init(void)
 	offset = 0;
 
 	do {
+		tty_port_init(&info->port);
+		info->port.ops = &esp_port_ops;
 		info->io_port = esp[i] + offset;
 		info->irq = irq[i];
 		info->line = (i * 8) + (offset / 8);
@@ -2437,8 +2452,6 @@ static int __init espserial_init(void)
 		info->config.flow_off = flow_off;
 		info->config.pio_threshold = pio_threshold;
 		info->next_port = ports;
-		init_waitqueue_head(&info->port.open_wait);
-		init_waitqueue_head(&info->port.close_wait);
 		init_waitqueue_head(&info->delta_msr_wait);
 		init_waitqueue_head(&info->break_wait);
 		ports = info;
diff --git a/drivers/char/generic_serial.c b/drivers/char/generic_serial.c
index c6090f84a2e4..9e4e569dc00d 100644
--- a/drivers/char/generic_serial.c
+++ b/drivers/char/generic_serial.c
@@ -376,7 +376,8 @@ static void gs_shutdown_port (struct gs_port *port)
 
 void gs_hangup(struct tty_struct *tty)
 {
-	struct gs_port   *port;
+	struct gs_port *port;
+	unsigned long flags;
 
 	func_enter ();
 
@@ -386,9 +387,11 @@ void gs_hangup(struct tty_struct *tty)
 		return;
 
 	gs_shutdown_port (port);
+	spin_lock_irqsave(&port->port.lock, flags);
 	port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|GS_ACTIVE);
 	port->port.tty = NULL;
 	port->port.count = 0;
+	spin_unlock_irqrestore(&port->port.lock, flags);
 
 	wake_up_interruptible(&port->port.open_wait);
 	func_exit ();
@@ -397,7 +400,8 @@ void gs_hangup(struct tty_struct *tty)
 
 int gs_block_til_ready(void *port_, struct file * filp)
 {
-	struct gs_port *port = port_;
+	struct gs_port *gp = port_;
+	struct tty_port *port = &gp->port;
 	DECLARE_WAITQUEUE(wait, current);
 	int    retval;
 	int    do_clocal = 0;
@@ -409,16 +413,16 @@ int gs_block_til_ready(void *port_, struct file * filp)
 
 	if (!port) return 0;
 
-	tty = port->port.tty;
+	tty = port->tty;
 
 	gs_dprintk (GS_DEBUG_BTR, "Entering gs_block_till_ready.\n"); 
 	/*
 	 * If the device is in the middle of being closed, then block
 	 * until it's done, and then try again.
 	 */
-	if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&port->port.close_wait);
-		if (port->port.flags & ASYNC_HUP_NOTIFY)
+	if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
+		interruptible_sleep_on(&port->close_wait);
+		if (port->flags & ASYNC_HUP_NOTIFY)
 			return -EAGAIN;
 		else
 			return -ERESTARTSYS;
@@ -432,7 +436,7 @@ int gs_block_til_ready(void *port_, struct file * filp)
 	 */
 	if ((filp->f_flags & O_NONBLOCK) ||
 	    (tty->flags & (1 << TTY_IO_ERROR))) {
-		port->port.flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 
@@ -444,34 +448,34 @@ int gs_block_til_ready(void *port_, struct file * filp)
 	/*
 	 * Block waiting for the carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, port->port.count is dropped by one, so that
+	 * this loop, port->count is dropped by one, so that
 	 * rs_close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 	retval = 0;
 
-	add_wait_queue(&port->port.open_wait, &wait);
+	add_wait_queue(&port->open_wait, &wait);
 
 	gs_dprintk (GS_DEBUG_BTR, "after add waitq.\n"); 
-	spin_lock_irqsave(&port->driver_lock, flags);
+	spin_lock_irqsave(&port->lock, flags);
 	if (!tty_hung_up_p(filp)) {
-		port->port.count--;
+		port->count--;
 	}
-	spin_unlock_irqrestore(&port->driver_lock, flags);
-	port->port.blocked_open++;
+	port->blocked_open++;
+	spin_unlock_irqrestore(&port->lock, flags);
 	while (1) {
-		CD = port->rd->get_CD (port);
+		CD = tty_port_carrier_raised(port);
 		gs_dprintk (GS_DEBUG_BTR, "CD is now %d.\n", CD);
 		set_current_state (TASK_INTERRUPTIBLE);
 		if (tty_hung_up_p(filp) ||
-		    !(port->port.flags & ASYNC_INITIALIZED)) {
-			if (port->port.flags & ASYNC_HUP_NOTIFY)
+		    !(port->flags & ASYNC_INITIALIZED)) {
+			if (port->flags & ASYNC_HUP_NOTIFY)
 				retval = -EAGAIN;
 			else
 				retval = -ERESTARTSYS;
 			break;
 		}
-		if (!(port->port.flags & ASYNC_CLOSING) &&
+		if (!(port->flags & ASYNC_CLOSING) &&
 		    (do_clocal || CD))
 			break;
 		gs_dprintk (GS_DEBUG_BTR, "signal_pending is now: %d (%lx)\n", 
@@ -483,19 +487,20 @@ int gs_block_til_ready(void *port_, struct file * filp)
 		schedule();
 	}
 	gs_dprintk (GS_DEBUG_BTR, "Got out of the loop. (%d)\n",
-		    port->port.blocked_open);
+		    port->blocked_open);
 	set_current_state (TASK_RUNNING);
-	remove_wait_queue(&port->port.open_wait, &wait);
+	remove_wait_queue(&port->open_wait, &wait);
+	
+	spin_lock_irqsave(&port->lock, flags);
 	if (!tty_hung_up_p(filp)) {
-		port->port.count++;
+		port->count++;
 	}
-	port->port.blocked_open--;
-	if (retval)
-		return retval;
-
-	port->port.flags |= ASYNC_NORMAL_ACTIVE;
+	port->blocked_open--;
+	if (retval == 0)
+        	port->flags |= ASYNC_NORMAL_ACTIVE;
+	spin_unlock_irqrestore(&port->lock, flags);
 	func_exit ();
-	return 0;
+	return retval;
 }			 
 
 
@@ -506,7 +511,7 @@ void gs_close(struct tty_struct * tty, struct file * filp)
 	
 	func_enter ();
 
-	port = (struct gs_port *) tty->driver_data;
+	port = tty->driver_data;
 
 	if (!port) return;
 
@@ -516,10 +521,10 @@ void gs_close(struct tty_struct * tty, struct file * filp)
 		port->port.tty = tty;
 	}
 
-	spin_lock_irqsave(&port->driver_lock, flags);
+	spin_lock_irqsave(&port->port.lock, flags);
 
 	if (tty_hung_up_p(filp)) {
-		spin_unlock_irqrestore(&port->driver_lock, flags);
+		spin_unlock_irqrestore(&port->port.lock, flags);
 		if (port->rd->hungup)
 			port->rd->hungup (port);
 		func_exit ();
@@ -538,7 +543,7 @@ void gs_close(struct tty_struct * tty, struct file * filp)
 
 	if (port->port.count) {
 		gs_dprintk(GS_DEBUG_CLOSE, "gs_close port %p: count: %d\n", port, port->port.count);
-		spin_unlock_irqrestore(&port->driver_lock, flags);
+		spin_unlock_irqrestore(&port->port.lock, flags);
 		func_exit ();
 		return;
 	}
@@ -559,8 +564,10 @@ void gs_close(struct tty_struct * tty, struct file * filp)
 	 * line status register.
 	 */
 
+	spin_lock_irqsave(&port->driver_lock, flags);
 	port->rd->disable_rx_interrupts (port);
 	spin_unlock_irqrestore(&port->driver_lock, flags);
+	spin_unlock_irqrestore(&port->port.lock, flags);
 
 	/* close has no way of returning "EINTR", so discard return value */
 	if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
@@ -573,20 +580,25 @@ void gs_close(struct tty_struct * tty, struct file * filp)
 	tty_ldisc_flush(tty);
 	tty->closing = 0;
 
+	spin_lock_irqsave(&port->driver_lock, flags);
 	port->event = 0;
 	port->rd->close (port);
 	port->rd->shutdown_port (port);
+	spin_unlock_irqrestore(&port->driver_lock, flags);
+
+	spin_lock_irqsave(&port->port.lock, flags);
 	port->port.tty = NULL;
 
 	if (port->port.blocked_open) {
 		if (port->close_delay) {
-			spin_unlock_irqrestore(&port->driver_lock, flags);
+			spin_unlock_irqrestore(&port->port.lock, flags);
 			msleep_interruptible(jiffies_to_msecs(port->close_delay));
-			spin_lock_irqsave(&port->driver_lock, flags);
+			spin_lock_irqsave(&port->port.lock, flags);
 		}
 		wake_up_interruptible(&port->port.open_wait);
 	}
 	port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING | ASYNC_INITIALIZED);
+	spin_unlock_irqrestore(&port->port.lock, flags);
 	wake_up_interruptible(&port->port.close_wait);
 
 	func_exit ();
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 53fdc7ff3870..32b8bbf5003e 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -46,7 +46,7 @@
 /*
  * The High Precision Event Timer driver.
  * This driver is closely modelled after the rtc.c driver.
- * http://www.intel.com/hardwaredesign/hpetspec.htm
+ * http://www.intel.com/hardwaredesign/hpetspec_1.pdf
  */
 #define	HPET_USER_FREQ	(64)
 #define	HPET_DRIFT	(500)
diff --git a/drivers/char/hvc_beat.c b/drivers/char/hvc_beat.c
index 91cdb35a9204..0afc8b82212e 100644
--- a/drivers/char/hvc_beat.c
+++ b/drivers/char/hvc_beat.c
@@ -44,7 +44,7 @@ static int hvc_beat_get_chars(uint32_t vtermno, char *buf, int cnt)
 	static unsigned char q[sizeof(unsigned long) * 2]
 		__attribute__((aligned(sizeof(unsigned long))));
 	static int qlen = 0;
-	unsigned long got;
+	u64 got;
 
 again:
 	if (qlen) {
@@ -63,7 +63,7 @@ again:
 		}
 	}
 	if (beat_get_term_char(vtermno, &got,
-		((unsigned long *)q), ((unsigned long *)q) + 1) == 0) {
+		((u64 *)q), ((u64 *)q) + 1) == 0) {
 		qlen = got;
 		goto again;
 	}
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index fb57f67bb427..5a8a4c28c867 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -529,7 +529,7 @@ static void hvc_set_winsz(struct work_struct *work)
 	tty = tty_kref_get(hp->tty);
 	spin_unlock_irqrestore(&hp->lock, hvc_flags);
 
-	tty_do_resize(tty, tty, &ws);
+	tty_do_resize(tty, &ws);
 	tty_kref_put(tty);
 }
 
@@ -695,6 +695,7 @@ void hvc_resize(struct hvc_struct *hp, struct winsize ws)
 	hp->ws = ws;
 	schedule_work(&hp->tty_resize);
 }
+EXPORT_SYMBOL_GPL(hvc_resize);
 
 /*
  * This kthread is either polling or interrupt driven.  This is determined by
diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c
index 5ea7d7713fca..a53496828b76 100644
--- a/drivers/char/hvc_iucv.c
+++ b/drivers/char/hvc_iucv.c
@@ -1,26 +1,30 @@
 /*
- * hvc_iucv.c - z/VM IUCV back-end for the Hypervisor Console (HVC)
+ * hvc_iucv.c - z/VM IUCV hypervisor console (HVC) device driver
  *
- * This back-end for HVC provides terminal access via
+ * This HVC device driver provides terminal access using
  * z/VM IUCV communication paths.
  *
- * Copyright IBM Corp. 2008.
+ * Copyright IBM Corp. 2008
  *
  * Author(s):	Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
  */
 #define KMSG_COMPONENT		"hvc_iucv"
+#define pr_fmt(fmt)		KMSG_COMPONENT ": " fmt
 
 #include <linux/types.h>
 #include <asm/ebcdic.h>
+#include <linux/delay.h>
+#include <linux/init.h>
 #include <linux/mempool.h>
 #include <linux/module.h>
 #include <linux/tty.h>
+#include <linux/wait.h>
 #include <net/iucv/iucv.h>
 
 #include "hvc_console.h"
 
 
-/* HVC backend for z/VM IUCV */
+/* General device driver settings */
 #define HVC_IUCV_MAGIC		0xc9e4c3e5
 #define MAX_HVC_IUCV_LINES	HVC_ALLOC_TTY_ADAPTERS
 #define MEMPOOL_MIN_NR		(PAGE_SIZE / sizeof(struct iucv_tty_buffer)/4)
@@ -33,14 +37,14 @@
 #define MSG_TYPE_WINSIZE	0x08	/* Terminal window size update */
 #define MSG_TYPE_DATA		0x10	/* Terminal data */
 
-#define MSG_SIZE(s)		((s) + offsetof(struct iucv_tty_msg, data))
 struct iucv_tty_msg {
 	u8	version;		/* Message version */
 	u8	type;			/* Message type */
-#define MSG_MAX_DATALEN		(~(u16)0)
+#define MSG_MAX_DATALEN		((u16)(~0))
 	u16	datalen;		/* Payload length */
 	u8	data[];			/* Payload buffer */
 } __attribute__((packed));
+#define MSG_SIZE(s)		((s) + offsetof(struct iucv_tty_msg, data))
 
 enum iucv_state_t {
 	IUCV_DISCONN	= 0,
@@ -54,19 +58,26 @@ enum tty_state_t {
 };
 
 struct hvc_iucv_private {
-	struct hvc_struct	*hvc; /* HVC console struct reference */
+	struct hvc_struct	*hvc;		/* HVC struct reference */
 	u8			srv_name[8];	/* IUCV service name (ebcdic) */
+	unsigned char		is_console;	/* Linux console usage flag */
 	enum iucv_state_t	iucv_state;	/* IUCV connection status */
 	enum tty_state_t	tty_state;	/* TTY status */
 	struct iucv_path	*path;		/* IUCV path pointer */
 	spinlock_t		lock;		/* hvc_iucv_private lock */
+#define SNDBUF_SIZE		(PAGE_SIZE)	/* must be < MSG_MAX_DATALEN */
+	void			*sndbuf;	/* send buffer		  */
+	size_t			sndbuf_len;	/* length of send buffer  */
+#define QUEUE_SNDBUF_DELAY	(HZ / 25)
+	struct delayed_work	sndbuf_work;	/* work: send iucv msg(s) */
+	wait_queue_head_t	sndbuf_waitq;	/* wait for send completion */
 	struct list_head	tty_outqueue;	/* outgoing IUCV messages */
 	struct list_head	tty_inqueue;	/* incoming IUCV messages */
 };
 
 struct iucv_tty_buffer {
 	struct list_head	list;	/* list pointer */
-	struct iucv_message	msg;	/* store an incoming IUCV message */
+	struct iucv_message	msg;	/* store an IUCV message */
 	size_t			offset;	/* data buffer offset */
 	struct iucv_tty_msg	*mbuf;	/* buffer to store input/output data */
 };
@@ -78,11 +89,12 @@ static void hvc_iucv_msg_pending(struct iucv_path *, struct iucv_message *);
 static void hvc_iucv_msg_complete(struct iucv_path *, struct iucv_message *);
 
 
-/* Kernel module parameters */
-static unsigned long hvc_iucv_devices;
+/* Kernel module parameter: use one terminal device as default */
+static unsigned long hvc_iucv_devices = 1;
 
 /* Array of allocated hvc iucv tty lines... */
 static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];
+#define IUCV_HVC_CON_IDX	(0)
 
 /* Kmem cache and mempool for iucv_tty_buffer elements */
 static struct kmem_cache *hvc_iucv_buffer_cache;
@@ -112,7 +124,7 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
 }
 
 /**
- * alloc_tty_buffer() - Returns a new struct iucv_tty_buffer element.
+ * alloc_tty_buffer() - Return a new struct iucv_tty_buffer element.
  * @size:	Size of the internal buffer used to store data.
  * @flags:	Memory allocation flags passed to mempool.
  *
@@ -120,7 +132,6 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
  * allocates an internal data buffer with the specified size @size.
  * Note: The total message size arises from the internal buffer size and the
  *	 members of the iucv_tty_msg structure.
- *
  * The function returns NULL if memory allocation has failed.
  */
 static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
@@ -130,7 +141,7 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
 	bufp = mempool_alloc(hvc_iucv_mempool, flags);
 	if (!bufp)
 		return NULL;
-	memset(bufp, 0, sizeof(struct iucv_tty_buffer));
+	memset(bufp, 0, sizeof(*bufp));
 
 	if (size > 0) {
 		bufp->msg.length = MSG_SIZE(size);
@@ -149,9 +160,6 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
 /**
  * destroy_tty_buffer() - destroy struct iucv_tty_buffer element.
  * @bufp:	Pointer to a struct iucv_tty_buffer element, SHALL NOT be NULL.
- *
- * The destroy_tty_buffer() function frees the internal data buffer and returns
- * the struct iucv_tty_buffer element back to the mempool for freeing.
  */
 static void destroy_tty_buffer(struct iucv_tty_buffer *bufp)
 {
@@ -161,11 +169,7 @@ static void destroy_tty_buffer(struct iucv_tty_buffer *bufp)
 
 /**
  * destroy_tty_buffer_list() - call destroy_tty_buffer() for each list element.
- * @list:	List head pointer to a list containing struct iucv_tty_buffer
- *		elements.
- *
- * Calls destroy_tty_buffer() for each struct iucv_tty_buffer element in the
- * list @list.
+ * @list:	List containing struct iucv_tty_buffer elements.
  */
 static void destroy_tty_buffer_list(struct list_head *list)
 {
@@ -178,24 +182,24 @@ static void destroy_tty_buffer_list(struct list_head *list)
 }
 
 /**
- * hvc_iucv_write() - Receive IUCV message write data to HVC console buffer.
- * @priv:		Pointer to hvc_iucv_private structure.
- * @buf:		HVC console buffer for writing received terminal data.
- * @count:		HVC console buffer size.
+ * hvc_iucv_write() - Receive IUCV message & write data to HVC buffer.
+ * @priv:		Pointer to struct hvc_iucv_private
+ * @buf:		HVC buffer for writing received terminal data.
+ * @count:		HVC buffer size.
  * @has_more_data:	Pointer to an int variable.
  *
  * The function picks up pending messages from the input queue and receives
  * the message data that is then written to the specified buffer @buf.
- * If the buffer size @count is less than the data message size, then the
+ * If the buffer size @count is less than the data message size, the
  * message is kept on the input queue and @has_more_data is set to 1.
- * If the message data has been entirely written, the message is removed from
+ * If all message data has been written, the message is removed from
  * the input queue.
  *
  * The function returns the number of bytes written to the terminal, zero if
  * there are no pending data messages available or if there is no established
  * IUCV path.
  * If the IUCV path has been severed, then -EPIPE is returned to cause a
- * hang up (that is issued by the HVC console layer).
+ * hang up (that is issued by the HVC layer).
  */
 static int hvc_iucv_write(struct hvc_iucv_private *priv,
 			  char *buf, int count, int *has_more_data)
@@ -204,12 +208,12 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
 	int written;
 	int rc;
 
-	/* Immediately return if there is no IUCV connection */
+	/* immediately return if there is no IUCV connection */
 	if (priv->iucv_state == IUCV_DISCONN)
 		return 0;
 
-	/* If the IUCV path has been severed, return -EPIPE to inform the
-	 * hvc console layer to hang up the tty device. */
+	/* if the IUCV path has been severed, return -EPIPE to inform the
+	 * HVC layer to hang up the tty device. */
 	if (priv->iucv_state == IUCV_SEVERED)
 		return -EPIPE;
 
@@ -217,7 +221,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
 	if (list_empty(&priv->tty_inqueue))
 		return 0;
 
-	/* receive a iucv message and flip data to the tty (ldisc) */
+	/* receive an iucv message and flip data to the tty (ldisc) */
 	rb = list_first_entry(&priv->tty_inqueue, struct iucv_tty_buffer, list);
 
 	written = 0;
@@ -260,7 +264,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
 	case MSG_TYPE_WINSIZE:
 		if (rb->mbuf->datalen != sizeof(struct winsize))
 			break;
-		hvc_resize(priv->hvc, *((struct winsize *)rb->mbuf->data));
+		hvc_resize(priv->hvc, *((struct winsize *) rb->mbuf->data));
 		break;
 
 	case MSG_TYPE_ERROR:	/* ignored ... */
@@ -284,10 +288,9 @@ out_written:
  * @buf:	Pointer to a buffer to store data
  * @count:	Size of buffer available for writing
  *
- * The hvc_console thread calls this method to read characters from
- * the terminal backend. If an IUCV communication path has been established,
- * pending IUCV messages are received and data is copied into buffer @buf
- * up to @count bytes.
+ * The HVC thread calls this method to read characters from the back-end.
+ * If an IUCV communication path has been established, pending IUCV messages
+ * are received and data is copied into buffer @buf up to @count bytes.
  *
  * Locking:	The routine gets called under an irqsave() spinlock; and
  *		the routine locks the struct hvc_iucv_private->lock to call
@@ -318,66 +321,122 @@ static int hvc_iucv_get_chars(uint32_t vtermno, char *buf, int count)
 }
 
 /**
- * hvc_iucv_send() - Send an IUCV message containing terminal data.
+ * hvc_iucv_queue() - Buffer terminal data for sending.
  * @priv:	Pointer to struct hvc_iucv_private instance.
  * @buf:	Buffer containing data to send.
- * @size:	Size of buffer and amount of data to send.
+ * @count:	Size of buffer and amount of data to send.
+ *
+ * The function queues data for sending. To actually send the buffered data,
+ * a work queue function is scheduled (with QUEUE_SNDBUF_DELAY).
+ * The function returns the number of data bytes that has been buffered.
  *
- * If an IUCV communication path is established, the function copies the buffer
- * data to a newly allocated struct iucv_tty_buffer element, sends the data and
- * puts the element to the outqueue.
+ * If the device is not connected, data is ignored and the function returns
+ * @count.
+ * If the buffer is full, the function returns 0.
+ * If an existing IUCV communicaton path has been severed, -EPIPE is returned
+ * (that can be passed to HVC layer to cause a tty hangup).
+ */
+static int hvc_iucv_queue(struct hvc_iucv_private *priv, const char *buf,
+			  int count)
+{
+	size_t len;
+
+	if (priv->iucv_state == IUCV_DISCONN)
+		return count;			/* ignore data */
+
+	if (priv->iucv_state == IUCV_SEVERED)
+		return -EPIPE;
+
+	len = min_t(size_t, count, SNDBUF_SIZE - priv->sndbuf_len);
+	if (!len)
+		return 0;
+
+	memcpy(priv->sndbuf + priv->sndbuf_len, buf, len);
+	priv->sndbuf_len += len;
+
+	if (priv->iucv_state == IUCV_CONNECTED)
+		schedule_delayed_work(&priv->sndbuf_work, QUEUE_SNDBUF_DELAY);
+
+	return len;
+}
+
+/**
+ * hvc_iucv_send() - Send an IUCV message containing terminal data.
+ * @priv:	Pointer to struct hvc_iucv_private instance.
  *
- * If there is no IUCV communication path established, the function returns 0.
- * If an existing IUCV communicaton path has been severed, the function returns
- * -EPIPE (can be passed to HVC layer to cause a tty hangup).
+ * If an IUCV communication path has been established, the buffered output data
+ * is sent via an IUCV message and the number of bytes sent is returned.
+ * Returns 0 if there is no established IUCV communication path or
+ * -EPIPE if an existing IUCV communicaton path has been severed.
  */
-static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf,
-			 int count)
+static int hvc_iucv_send(struct hvc_iucv_private *priv)
 {
 	struct iucv_tty_buffer *sb;
-	int rc;
-	u16 len;
+	int rc, len;
 
 	if (priv->iucv_state == IUCV_SEVERED)
 		return -EPIPE;
 
 	if (priv->iucv_state == IUCV_DISCONN)
-		return 0;
+		return -EIO;
 
-	len = min_t(u16, MSG_MAX_DATALEN, count);
+	if (!priv->sndbuf_len)
+		return 0;
 
 	/* allocate internal buffer to store msg data and also compute total
 	 * message length */
-	sb = alloc_tty_buffer(len, GFP_ATOMIC);
+	sb = alloc_tty_buffer(priv->sndbuf_len, GFP_ATOMIC);
 	if (!sb)
 		return -ENOMEM;
 
-	sb->mbuf->datalen = len;
-	memcpy(sb->mbuf->data, buf, len);
+	memcpy(sb->mbuf->data, priv->sndbuf, priv->sndbuf_len);
+	sb->mbuf->datalen = (u16) priv->sndbuf_len;
+	sb->msg.length = MSG_SIZE(sb->mbuf->datalen);
 
 	list_add_tail(&sb->list, &priv->tty_outqueue);
 
 	rc = __iucv_message_send(priv->path, &sb->msg, 0, 0,
 				 (void *) sb->mbuf, sb->msg.length);
 	if (rc) {
+		/* drop the message here; however we might want to handle
+		 * 0x03 (msg limit reached) by trying again... */
 		list_del(&sb->list);
 		destroy_tty_buffer(sb);
-		len = 0;
 	}
+	len = priv->sndbuf_len;
+	priv->sndbuf_len = 0;
 
 	return len;
 }
 
 /**
+ * hvc_iucv_sndbuf_work() - Send buffered data over IUCV
+ * @work:	Work structure.
+ *
+ * This work queue function sends buffered output data over IUCV and,
+ * if not all buffered data could be sent, reschedules itself.
+ */
+static void hvc_iucv_sndbuf_work(struct work_struct *work)
+{
+	struct hvc_iucv_private *priv;
+
+	priv = container_of(work, struct hvc_iucv_private, sndbuf_work.work);
+	if (!priv)
+		return;
+
+	spin_lock_bh(&priv->lock);
+	hvc_iucv_send(priv);
+	spin_unlock_bh(&priv->lock);
+}
+
+/**
  * hvc_iucv_put_chars() - HVC put_chars operation.
  * @vtermno:	HVC virtual terminal number.
  * @buf:	Pointer to an buffer to read data from
  * @count:	Size of buffer available for reading
  *
- * The hvc_console thread calls this method to write characters from
- * to the terminal backend.
- * The function calls hvc_iucv_send() under the lock of the
- * struct hvc_iucv_private instance that corresponds to the tty @vtermno.
+ * The HVC thread calls this method to write characters to the back-end.
+ * The function calls hvc_iucv_queue() to queue terminal data for sending.
  *
  * Locking:	The method gets called under an irqsave() spinlock; and
  *		locks struct hvc_iucv_private->lock.
@@ -385,7 +444,7 @@ static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf,
 static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
 {
 	struct hvc_iucv_private *priv = hvc_iucv_get_private(vtermno);
-	int sent;
+	int queued;
 
 	if (count <= 0)
 		return 0;
@@ -394,10 +453,10 @@ static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
 		return -ENODEV;
 
 	spin_lock(&priv->lock);
-	sent = hvc_iucv_send(priv, buf, count);
+	queued = hvc_iucv_queue(priv, buf, count);
 	spin_unlock(&priv->lock);
 
-	return sent;
+	return queued;
 }
 
 /**
@@ -406,7 +465,7 @@ static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
  * @id:	Additional data (originally passed to hvc_alloc): the index of an struct
  *	hvc_iucv_private instance.
  *
- * The function sets the tty state to TTY_OPEN for the struct hvc_iucv_private
+ * The function sets the tty state to TTY_OPENED for the struct hvc_iucv_private
  * instance that is derived from @id. Always returns 0.
  *
  * Locking:	struct hvc_iucv_private->lock, spin_lock_bh
@@ -427,12 +486,8 @@ static int hvc_iucv_notifier_add(struct hvc_struct *hp, int id)
 }
 
 /**
- * hvc_iucv_cleanup() - Clean up function if the tty portion is finally closed.
+ * hvc_iucv_cleanup() - Clean up and reset a z/VM IUCV HVC instance.
  * @priv:	Pointer to the struct hvc_iucv_private instance.
- *
- * The functions severs the established IUCV communication path (if any), and
- * destroy struct iucv_tty_buffer elements from the in- and outqueue. Finally,
- * the functions resets the states to TTY_CLOSED and IUCV_DISCONN.
  */
 static void hvc_iucv_cleanup(struct hvc_iucv_private *priv)
 {
@@ -441,25 +496,62 @@ static void hvc_iucv_cleanup(struct hvc_iucv_private *priv)
 
 	priv->tty_state = TTY_CLOSED;
 	priv->iucv_state = IUCV_DISCONN;
+
+	priv->sndbuf_len = 0;
 }
 
 /**
- * hvc_iucv_notifier_hangup() - HVC notifier for tty hangups.
- * @hp: Pointer to the HVC device (struct hvc_struct)
- * @id: Additional data (originally passed to hvc_alloc): the index of an struct
- *	hvc_iucv_private instance.
+ * tty_outqueue_empty() - Test if the tty outq is empty
+ * @priv:	Pointer to struct hvc_iucv_private instance.
+ */
+static inline int tty_outqueue_empty(struct hvc_iucv_private *priv)
+{
+	int rc;
+
+	spin_lock_bh(&priv->lock);
+	rc = list_empty(&priv->tty_outqueue);
+	spin_unlock_bh(&priv->lock);
+
+	return rc;
+}
+
+/**
+ * flush_sndbuf_sync() - Flush send buffer and wait for completion
+ * @priv:	Pointer to struct hvc_iucv_private instance.
  *
- * This routine notifies the HVC backend that a tty hangup (carrier loss,
- * virtual or otherwise) has occured.
+ * The routine cancels a pending sndbuf work, calls hvc_iucv_send()
+ * to flush any buffered terminal output data and waits for completion.
+ */
+static void flush_sndbuf_sync(struct hvc_iucv_private *priv)
+{
+	int sync_wait;
+
+	cancel_delayed_work_sync(&priv->sndbuf_work);
+
+	spin_lock_bh(&priv->lock);
+	hvc_iucv_send(priv);		/* force sending buffered data */
+	sync_wait = !list_empty(&priv->tty_outqueue); /* anything queued ? */
+	spin_unlock_bh(&priv->lock);
+
+	if (sync_wait)
+		wait_event_timeout(priv->sndbuf_waitq,
+				   tty_outqueue_empty(priv), HZ);
+}
+
+/**
+ * hvc_iucv_notifier_hangup() - HVC notifier for TTY hangups.
+ * @hp:		Pointer to the HVC device (struct hvc_struct)
+ * @id:		Additional data (originally passed to hvc_alloc):
+ *		the index of an struct hvc_iucv_private instance.
  *
- * The HVC backend for z/VM IUCV ignores virtual hangups (vhangup()), to keep
- * an existing IUCV communication path established.
+ * This routine notifies the HVC back-end that a tty hangup (carrier loss,
+ * virtual or otherwise) has occured.
+ * The z/VM IUCV HVC device driver ignores virtual hangups (vhangup())
+ * to keep an existing IUCV communication path established.
  * (Background: vhangup() is called from user space (by getty or login) to
  *		disable writing to the tty by other applications).
- *
- * If the tty has been opened (e.g. getty) and an established IUCV path has been
- * severed (we caused the tty hangup in that case), then the functions invokes
- * hvc_iucv_cleanup() to clean up.
+ * If the tty has been opened and an established IUCV path has been severed
+ * (we caused the tty hangup), the function calls hvc_iucv_cleanup().
  *
  * Locking:	struct hvc_iucv_private->lock
  */
@@ -471,12 +563,12 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id)
 	if (!priv)
 		return;
 
+	flush_sndbuf_sync(priv);
+
 	spin_lock_bh(&priv->lock);
 	/* NOTE: If the hangup was scheduled by ourself (from the iucv
-	 *	 path_servered callback [IUCV_SEVERED]), then we have to
-	 *	 finally clean up the tty backend structure and set state to
-	 *	 TTY_CLOSED.
-	 *
+	 *	 path_servered callback [IUCV_SEVERED]), we have to clean up
+	 *	 our structure and to set state to TTY_CLOSED.
 	 *	 If the tty was hung up otherwise (e.g. vhangup()), then we
 	 *	 ignore this hangup and keep an established IUCV path open...
 	 *	 (...the reason is that we are not able to connect back to the
@@ -494,10 +586,9 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id)
  * @id:		Additional data (originally passed to hvc_alloc):
  *		the index of an struct hvc_iucv_private instance.
  *
- * This routine notifies the HVC backend that the last tty device file
- * descriptor has been closed.
- * The function calls hvc_iucv_cleanup() to clean up the struct hvc_iucv_private
- * instance.
+ * This routine notifies the HVC back-end that the last tty device fd has been
+ * closed.  The function calls hvc_iucv_cleanup() to clean up the struct
+ * hvc_iucv_private instance.
  *
  * Locking:	struct hvc_iucv_private->lock
  */
@@ -510,6 +601,8 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id)
 	if (!priv)
 		return;
 
+	flush_sndbuf_sync(priv);
+
 	spin_lock_bh(&priv->lock);
 	path = priv->path;		/* save reference to IUCV path */
 	priv->path = NULL;
@@ -527,20 +620,18 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id)
 /**
  * hvc_iucv_path_pending() - IUCV handler to process a connection request.
  * @path:	Pending path (struct iucv_path)
- * @ipvmid:	Originator z/VM system identifier
+ * @ipvmid:	z/VM system identifier of originator
  * @ipuser:	User specified data for this path
  *		(AF_IUCV: port/service name and originator port)
  *
- * The function uses the @ipuser data to check to determine if the pending
- * path belongs to a terminal managed by this HVC backend.
- * If the check is successful, then an additional check is done to ensure
- * that a terminal cannot be accessed multiple times (only one connection
- * to a terminal is allowed). In that particular case, the pending path is
- * severed. If it is the first connection, the pending path is accepted and
- * associated to the struct hvc_iucv_private. The iucv state is updated to
- * reflect that a communication path has been established.
+ * The function uses the @ipuser data to determine if the pending path belongs
+ * to a terminal managed by this device driver.
+ * If the path belongs to this driver, ensure that the terminal is not accessed
+ * multiple times (only one connection to a terminal is allowed).
+ * If the terminal is not yet connected, the pending path is accepted and is
+ * associated to the appropriate struct hvc_iucv_private instance.
  *
- * Returns 0 if the path belongs to a terminal managed by the this HVC backend;
+ * Returns 0 if @path belongs to a terminal managed by the this device driver;
  * otherwise returns -ENODEV in order to dispatch this path to other handlers.
  *
  * Locking:	struct hvc_iucv_private->lock
@@ -559,7 +650,6 @@ static	int hvc_iucv_path_pending(struct iucv_path *path,
 			priv = hvc_iucv_table[i];
 			break;
 		}
-
 	if (!priv)
 		return -ENODEV;
 
@@ -588,6 +678,9 @@ static	int hvc_iucv_path_pending(struct iucv_path *path,
 	priv->path = path;
 	priv->iucv_state = IUCV_CONNECTED;
 
+	/* flush buffered output data... */
+	schedule_delayed_work(&priv->sndbuf_work, 5);
+
 out_path_handled:
 	spin_unlock(&priv->lock);
 	return 0;
@@ -603,8 +696,7 @@ out_path_handled:
  * sets the iucv state to IUCV_SEVERED for the associated struct
  * hvc_iucv_private instance. Later, the IUCV_SEVERED state triggers a tty
  * hangup (hvc_iucv_get_chars() / hvc_iucv_write()).
- *
- * If tty portion of the HVC is closed then clean up the outqueue in addition.
+ * If tty portion of the HVC is closed, clean up the outqueue.
  *
  * Locking:	struct hvc_iucv_private->lock
  */
@@ -615,15 +707,25 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
 	spin_lock(&priv->lock);
 	priv->iucv_state = IUCV_SEVERED;
 
-	/* NOTE: If the tty has not yet been opened by a getty program
-	 *	 (e.g. to see console messages), then cleanup the
-	 *	 hvc_iucv_private structure to allow re-connects.
+	/* If the tty has not yet been opened, clean up the hvc_iucv_private
+	 * structure to allow re-connects.
+	 * This is also done for our console device because console hangups
+	 * are handled specially and no notifier is called by HVC.
+	 * The tty session is active (TTY_OPEN) and ready for re-connects...
 	 *
-	 *	 If the tty has been opened, the get_chars() callback returns
-	 *	 -EPIPE to signal the hvc console layer to hang up the tty. */
+	 * If it has been opened, let get_chars() return -EPIPE to signal the
+	 * HVC layer to hang up the tty.
+	 * If so, we need to wake up the HVC thread to call get_chars()...
+	 */
 	priv->path = NULL;
 	if (priv->tty_state == TTY_CLOSED)
 		hvc_iucv_cleanup(priv);
+	else
+		if (priv->is_console) {
+			hvc_iucv_cleanup(priv);
+			priv->tty_state = TTY_OPENED;
+		} else
+			hvc_kick();
 	spin_unlock(&priv->lock);
 
 	/* finally sever path (outside of priv->lock due to lock ordering) */
@@ -636,9 +738,9 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
  * @path:	Pending path (struct iucv_path)
  * @msg:	Pointer to the IUCV message
  *
- * The function stores an incoming message on the input queue for later
+ * The function puts an incoming message on the input queue for later
  * processing (by hvc_iucv_get_chars() / hvc_iucv_write()).
- * However, if the tty has not yet been opened, the message is rejected.
+ * If the tty has not yet been opened, the message is rejected.
  *
  * Locking:	struct hvc_iucv_private->lock
  */
@@ -648,6 +750,12 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
 	struct hvc_iucv_private *priv = path->private;
 	struct iucv_tty_buffer *rb;
 
+	/* reject messages that exceed max size of iucv_tty_msg->datalen */
+	if (msg->length > MSG_SIZE(MSG_MAX_DATALEN)) {
+		iucv_message_reject(path, msg);
+		return;
+	}
+
 	spin_lock(&priv->lock);
 
 	/* reject messages if tty has not yet been opened */
@@ -656,7 +764,7 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
 		goto unlock_return;
 	}
 
-	/* allocate buffer an empty buffer element */
+	/* allocate tty buffer to save iucv msg only */
 	rb = alloc_tty_buffer(0, GFP_ATOMIC);
 	if (!rb) {
 		iucv_message_reject(path, msg);
@@ -666,7 +774,7 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
 
 	list_add_tail(&rb->list, &priv->tty_inqueue);
 
-	hvc_kick();	/* wakup hvc console thread */
+	hvc_kick();	/* wake up hvc thread */
 
 unlock_return:
 	spin_unlock(&priv->lock);
@@ -677,10 +785,10 @@ unlock_return:
  * @path:	Pending path (struct iucv_path)
  * @msg:	Pointer to the IUCV message
  *
- * The function is called upon completion of message delivery and the
- * message is removed from the outqueue. Additional delivery information
- * can be found in msg->audit: rejected messages (0x040000 (IPADRJCT)) and
- * purged messages (0x010000 (IPADPGNR)).
+ * The function is called upon completion of message delivery to remove the
+ * message from the outqueue. Additional delivery information can be found
+ * msg->audit: rejected messages (0x040000 (IPADRJCT)), and
+ *	       purged messages	 (0x010000 (IPADPGNR)).
  *
  * Locking:	struct hvc_iucv_private->lock
  */
@@ -697,6 +805,7 @@ static void hvc_iucv_msg_complete(struct iucv_path *path,
 			list_move(&ent->list, &list_remove);
 			break;
 		}
+	wake_up(&priv->sndbuf_waitq);
 	spin_unlock(&priv->lock);
 	destroy_tty_buffer_list(&list_remove);
 }
@@ -713,13 +822,14 @@ static struct hv_ops hvc_iucv_ops = {
 
 /**
  * hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance
- * @id:	hvc_iucv_table index
+ * @id:			hvc_iucv_table index
+ * @is_console:		Flag if the instance is used as Linux console
  *
- * This function allocates a new hvc_iucv_private struct and put the
- * instance into hvc_iucv_table at index @id.
+ * This function allocates a new hvc_iucv_private structure and stores
+ * the instance in hvc_iucv_table at index @id.
  * Returns 0 on success; otherwise non-zero.
  */
-static int __init hvc_iucv_alloc(int id)
+static int __init hvc_iucv_alloc(int id, unsigned int is_console)
 {
 	struct hvc_iucv_private *priv;
 	char name[9];
@@ -732,18 +842,33 @@ static int __init hvc_iucv_alloc(int id)
 	spin_lock_init(&priv->lock);
 	INIT_LIST_HEAD(&priv->tty_outqueue);
 	INIT_LIST_HEAD(&priv->tty_inqueue);
+	INIT_DELAYED_WORK(&priv->sndbuf_work, hvc_iucv_sndbuf_work);
+	init_waitqueue_head(&priv->sndbuf_waitq);
+
+	priv->sndbuf = (void *) get_zeroed_page(GFP_KERNEL);
+	if (!priv->sndbuf) {
+		kfree(priv);
+		return -ENOMEM;
+	}
+
+	/* set console flag */
+	priv->is_console = is_console;
 
-	/* Finally allocate hvc */
-	priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id,
-			      HVC_IUCV_MAGIC + id, &hvc_iucv_ops, PAGE_SIZE);
+	/* finally allocate hvc */
+	priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id, /*		  PAGE_SIZE */
+			      HVC_IUCV_MAGIC + id, &hvc_iucv_ops, 256);
 	if (IS_ERR(priv->hvc)) {
 		rc = PTR_ERR(priv->hvc);
+		free_page((unsigned long) priv->sndbuf);
 		kfree(priv);
 		return rc;
 	}
 
+	/* notify HVC thread instead of using polling */
+	priv->hvc->irq_requested = 1;
+
 	/* setup iucv related information */
-	snprintf(name, 9, "ihvc%-4d", id);
+	snprintf(name, 9, "lnxhvc%-2d", id);
 	memcpy(priv->srv_name, name, 8);
 	ASCEBC(priv->srv_name, 8);
 
@@ -752,15 +877,16 @@ static int __init hvc_iucv_alloc(int id)
 }
 
 /**
- * hvc_iucv_init() - Initialization of HVC backend for z/VM IUCV
+ * hvc_iucv_init() - z/VM IUCV HVC device driver initialization
  */
 static int __init hvc_iucv_init(void)
 {
-	int rc, i;
+	int rc;
+	unsigned int i;
 
 	if (!MACHINE_IS_VM) {
-		pr_warning("The z/VM IUCV Hypervisor console cannot be "
-			   "used without z/VM.\n");
+		pr_info("The z/VM IUCV HVC device driver cannot "
+			   "be used without z/VM\n");
 		return -ENODEV;
 	}
 
@@ -774,26 +900,33 @@ static int __init hvc_iucv_init(void)
 					   sizeof(struct iucv_tty_buffer),
 					   0, 0, NULL);
 	if (!hvc_iucv_buffer_cache) {
-		pr_err("Not enough memory for driver initialization "
-			"(rs=%d).\n", 1);
+		pr_err("Allocating memory failed with reason code=%d\n", 1);
 		return -ENOMEM;
 	}
 
 	hvc_iucv_mempool = mempool_create_slab_pool(MEMPOOL_MIN_NR,
 						    hvc_iucv_buffer_cache);
 	if (!hvc_iucv_mempool) {
-		pr_err("Not enough memory for driver initialization "
-			"(rs=%d).\n", 2);
+		pr_err("Allocating memory failed with reason code=%d\n", 2);
 		kmem_cache_destroy(hvc_iucv_buffer_cache);
 		return -ENOMEM;
 	}
 
+	/* register the first terminal device as console
+	 * (must be done before allocating hvc terminal devices) */
+	rc = hvc_instantiate(HVC_IUCV_MAGIC, IUCV_HVC_CON_IDX, &hvc_iucv_ops);
+	if (rc) {
+		pr_err("Registering HVC terminal device as "
+		       "Linux console failed\n");
+		goto out_error_memory;
+	}
+
 	/* allocate hvc_iucv_private structs */
 	for (i = 0; i < hvc_iucv_devices; i++) {
-		rc = hvc_iucv_alloc(i);
+		rc = hvc_iucv_alloc(i, (i == IUCV_HVC_CON_IDX) ? 1 : 0);
 		if (rc) {
-			pr_err("Could not create new z/VM IUCV HVC backend "
-				"rc=%d.\n", rc);
+			pr_err("Creating a new HVC terminal device "
+				"failed with error code=%d\n", rc);
 			goto out_error_hvc;
 		}
 	}
@@ -801,7 +934,8 @@ static int __init hvc_iucv_init(void)
 	/* register IUCV callback handler */
 	rc = iucv_register(&hvc_iucv_handler, 0);
 	if (rc) {
-		pr_err("Could not register iucv handler (rc=%d).\n", rc);
+		pr_err("Registering IUCV handlers failed with error code=%d\n",
+			rc);
 		goto out_error_iucv;
 	}
 
@@ -816,22 +950,13 @@ out_error_hvc:
 				hvc_remove(hvc_iucv_table[i]->hvc);
 			kfree(hvc_iucv_table[i]);
 		}
+out_error_memory:
 	mempool_destroy(hvc_iucv_mempool);
 	kmem_cache_destroy(hvc_iucv_buffer_cache);
 	return rc;
 }
 
 /**
- * hvc_iucv_console_init() - Early console initialization
- */
-static	int __init hvc_iucv_console_init(void)
-{
-	if (!MACHINE_IS_VM || !hvc_iucv_devices)
-		return -ENODEV;
-	return hvc_instantiate(HVC_IUCV_MAGIC, 0, &hvc_iucv_ops);
-}
-
-/**
  * hvc_iucv_config() - Parsing of hvc_iucv=  kernel command line parameter
  * @val:	Parameter value (numeric)
  */
@@ -841,10 +966,5 @@ static	int __init hvc_iucv_config(char *val)
 }
 
 
-module_init(hvc_iucv_init);
-console_initcall(hvc_iucv_console_init);
+device_initcall(hvc_iucv_init);
 __setup("hvc_iucv=", hvc_iucv_config);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("HVC back-end for z/VM IUCV.");
-MODULE_AUTHOR("Hendrik Brueckner <brueckner@linux.vnet.ibm.com>");
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index af055287271a..406f8742a260 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -997,14 +997,14 @@ out:
 
 static int hvsi_write_room(struct tty_struct *tty)
 {
-	struct hvsi_struct *hp = (struct hvsi_struct *)tty->driver_data;
+	struct hvsi_struct *hp = tty->driver_data;
 
 	return N_OUTBUF - hp->n_outbuf;
 }
 
 static int hvsi_chars_in_buffer(struct tty_struct *tty)
 {
-	struct hvsi_struct *hp = (struct hvsi_struct *)tty->driver_data;
+	struct hvsi_struct *hp = tty->driver_data;
 
 	return hp->n_outbuf;
 }
@@ -1070,7 +1070,7 @@ out:
  */
 static void hvsi_throttle(struct tty_struct *tty)
 {
-	struct hvsi_struct *hp = (struct hvsi_struct *)tty->driver_data;
+	struct hvsi_struct *hp = tty->driver_data;
 
 	pr_debug("%s\n", __func__);
 
@@ -1079,7 +1079,7 @@ static void hvsi_throttle(struct tty_struct *tty)
 
 static void hvsi_unthrottle(struct tty_struct *tty)
 {
-	struct hvsi_struct *hp = (struct hvsi_struct *)tty->driver_data;
+	struct hvsi_struct *hp = tty->driver_data;
 	unsigned long flags;
 	int shouldflip = 0;
 
@@ -1100,7 +1100,7 @@ static void hvsi_unthrottle(struct tty_struct *tty)
 
 static int hvsi_tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct hvsi_struct *hp = (struct hvsi_struct *)tty->driver_data;
+	struct hvsi_struct *hp = tty->driver_data;
 
 	hvsi_get_mctrl(hp);
 	return hp->mctrl;
@@ -1109,7 +1109,7 @@ static int hvsi_tiocmget(struct tty_struct *tty, struct file *file)
 static int hvsi_tiocmset(struct tty_struct *tty, struct file *file,
 		unsigned int set, unsigned int clear)
 {
-	struct hvsi_struct *hp = (struct hvsi_struct *)tty->driver_data;
+	struct hvsi_struct *hp = tty->driver_data;
 	unsigned long flags;
 	uint16_t new_mctrl;
 
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c
index 8859aeac2d25..9b3e09cd41f9 100644
--- a/drivers/char/hw_random/n2-drv.c
+++ b/drivers/char/hw_random/n2-drv.c
@@ -482,7 +482,7 @@ static void n2rng_dump_test_buffer(struct n2rng *np)
 	int i;
 
 	for (i = 0; i < SELFTEST_BUFFER_WORDS; i++)
-		dev_err(&np->op->dev, "Test buffer slot %d [0x%016lx]\n",
+		dev_err(&np->op->dev, "Test buffer slot %d [0x%016llx]\n",
 			i, np->test_buffer[i]);
 }
 
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index b60d425ce8d1..fc8cf7ac7f2b 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -485,7 +485,21 @@ static struct dmi_system_id __initdata i8k_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "MP061"),
 		},
 	},
-	{ }
+	{
+		.ident = "Dell Precision",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Precision"),
+		},
+	},
+	{
+		.ident = "Dell Vostro",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"),
+		},
+	},
+        { }
 };
 
 /*
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index 04e4549299ba..24aa6e88e223 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -328,11 +328,13 @@ static inline void drop_rts(struct isi_port *port)
 }
 
 /* card->lock MUST NOT be held */
-static inline void raise_dtr_rts(struct isi_port *port)
+
+static void isicom_raise_dtr_rts(struct tty_port *port)
 {
-	struct isi_board *card = port->card;
+	struct isi_port *ip = container_of(port, struct isi_port, port);
+	struct isi_board *card = ip->card;
 	unsigned long base = card->base;
-	u16 channel = port->channel;
+	u16 channel = ip->channel;
 
 	if (!lock_card(card))
 		return;
@@ -340,7 +342,7 @@ static inline void raise_dtr_rts(struct isi_port *port)
 	outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 	outw(0x0f04, base);
 	InterruptTheCard(base);
-	port->status |= (ISI_DTR | ISI_RTS);
+	ip->status |= (ISI_DTR | ISI_RTS);
 	unlock_card(card);
 }
 
@@ -830,80 +832,10 @@ static int isicom_setup_port(struct tty_struct *tty)
 	return 0;
 }
 
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
-	struct isi_port *port)
+static int isicom_carrier_raised(struct tty_port *port)
 {
-	struct isi_board *card = port->card;
-	int do_clocal = 0, retval;
-	unsigned long flags;
-	DECLARE_WAITQUEUE(wait, current);
-
-	/* block if port is in the process of being closed */
-
-	if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) {
-		pr_dbg("block_til_ready: close in progress.\n");
-		interruptible_sleep_on(&port->port.close_wait);
-		if (port->port.flags & ASYNC_HUP_NOTIFY)
-			return -EAGAIN;
-		else
-			return -ERESTARTSYS;
-	}
-
-	/* if non-blocking mode is set ... */
-
-	if ((filp->f_flags & O_NONBLOCK) ||
-			(tty->flags & (1 << TTY_IO_ERROR))) {
-		pr_dbg("block_til_ready: non-block mode.\n");
-		port->port.flags |= ASYNC_NORMAL_ACTIVE;
-		return 0;
-	}
-
-	if (C_CLOCAL(tty))
-		do_clocal = 1;
-
-	/* block waiting for DCD to be asserted, and while
-						callout dev is busy */
-	retval = 0;
-	add_wait_queue(&port->port.open_wait, &wait);
-
-	spin_lock_irqsave(&card->card_lock, flags);
-	if (!tty_hung_up_p(filp))
-		port->port.count--;
-	port->port.blocked_open++;
-	spin_unlock_irqrestore(&card->card_lock, flags);
-
-	while (1) {
-		raise_dtr_rts(port);
-
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
-			if (port->port.flags & ASYNC_HUP_NOTIFY)
-				retval = -EAGAIN;
-			else
-				retval = -ERESTARTSYS;
-			break;
-		}
-		if (!(port->port.flags & ASYNC_CLOSING) &&
-				(do_clocal || (port->status & ISI_DCD))) {
-			break;
-		}
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-		schedule();
-	}
-	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&port->port.open_wait, &wait);
-	spin_lock_irqsave(&card->card_lock, flags);
-	if (!tty_hung_up_p(filp))
-		port->port.count++;
-	port->port.blocked_open--;
-	spin_unlock_irqrestore(&card->card_lock, flags);
-	if (retval)
-		return retval;
-	port->port.flags |= ASYNC_NORMAL_ACTIVE;
-	return 0;
+	struct isi_port *ip = container_of(port, struct isi_port, port);
+	return (ip->status & ISI_DCD)?1 : 0;
 }
 
 static int isicom_open(struct tty_struct *tty, struct file *filp)
@@ -932,12 +864,13 @@ static int isicom_open(struct tty_struct *tty, struct file *filp)
 
 	isicom_setup_board(card);
 
+	/* FIXME: locking on port.count etc */
 	port->port.count++;
 	tty->driver_data = port;
 	tty_port_tty_set(&port->port, tty);
 	error = isicom_setup_port(tty);
 	if (error == 0)
-		error = block_til_ready(tty, filp, port);
+		error = tty_port_block_til_ready(&port->port, tty, filp);
 	return error;
 }
 
@@ -1012,76 +945,30 @@ static void isicom_flush_buffer(struct tty_struct *tty)
 
 static void isicom_close(struct tty_struct *tty, struct file *filp)
 {
-	struct isi_port *port = tty->driver_data;
+	struct isi_port *ip = tty->driver_data;
+	struct tty_port *port = &ip->port;
 	struct isi_board *card;
 	unsigned long flags;
 
-	if (!port)
-		return;
-	card = port->card;
-	if (isicom_paranoia_check(port, tty->name, "isicom_close"))
-		return;
-
-	pr_dbg("Close start!!!.\n");
-
-	spin_lock_irqsave(&card->card_lock, flags);
-	if (tty_hung_up_p(filp)) {
-		spin_unlock_irqrestore(&card->card_lock, flags);
-		return;
-	}
-
-	if (tty->count == 1 && port->port.count != 1) {
-		printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
-			"count tty->count = 1 port count = %d.\n",
-			card->base, port->port.count);
-		port->port.count = 1;
-	}
-	if (--port->port.count < 0) {
-		printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
-			"count for channel%d = %d", card->base, port->channel,
-			port->port.count);
-		port->port.count = 0;
-	}
+	BUG_ON(!ip);
 
-	if (port->port.count) {
-		spin_unlock_irqrestore(&card->card_lock, flags);
+	card = ip->card;
+	if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
 		return;
-	}
-	port->port.flags |= ASYNC_CLOSING;
-	tty->closing = 1;
-	spin_unlock_irqrestore(&card->card_lock, flags);
 
-	if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
-		tty_wait_until_sent(tty, port->port.closing_wait);
 	/* indicate to the card that no more data can be received
 	   on this port */
 	spin_lock_irqsave(&card->card_lock, flags);
-	if (port->port.flags & ASYNC_INITIALIZED) {
-		card->port_status &= ~(1 << port->channel);
+	if (port->flags & ASYNC_INITIALIZED) {
+		card->port_status &= ~(1 << ip->channel);
 		outw(card->port_status, card->base + 0x02);
 	}
-	isicom_shutdown_port(port);
+	isicom_shutdown_port(ip);
 	spin_unlock_irqrestore(&card->card_lock, flags);
 
 	isicom_flush_buffer(tty);
-	tty_ldisc_flush(tty);
-
-	spin_lock_irqsave(&card->card_lock, flags);
-	tty->closing = 0;
-
-	if (port->port.blocked_open) {
-		spin_unlock_irqrestore(&card->card_lock, flags);
-		if (port->port.close_delay) {
-			pr_dbg("scheduling until time out.\n");
-			msleep_interruptible(
-				jiffies_to_msecs(port->port.close_delay));
-		}
-		spin_lock_irqsave(&card->card_lock, flags);
-		wake_up_interruptible(&port->port.open_wait);
-	}
-	port->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
-	wake_up_interruptible(&port->port.close_wait);
-	spin_unlock_irqrestore(&card->card_lock, flags);
+	
+	tty_port_close_end(port, tty);
 }
 
 /* write et all */
@@ -1420,10 +1307,7 @@ static void isicom_hangup(struct tty_struct *tty)
 	isicom_shutdown_port(port);
 	spin_unlock_irqrestore(&port->card->card_lock, flags);
 
-	port->port.count = 0;
-	port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-	tty_port_tty_set(&port->port, NULL);
-	wake_up_interruptible(&port->port.open_wait);
+	tty_port_hangup(&port->port);
 }
 
 
@@ -1452,6 +1336,11 @@ static const struct tty_operations isicom_ops = {
 	.break_ctl		= isicom_send_break,
 };
 
+static const struct tty_port_operations isicom_port_ops = {
+	.carrier_raised		= isicom_carrier_raised,
+	.raise_dtr_rts		= isicom_raise_dtr_rts,
+};
+
 static int __devinit reset_card(struct pci_dev *pdev,
 	const unsigned int card, unsigned int *signature)
 {
@@ -1794,6 +1683,7 @@ static int __init isicom_init(void)
 		spin_lock_init(&isi_card[idx].card_lock);
 		for (channel = 0; channel < 16; channel++, port++) {
 			tty_port_init(&port->port);
+			port->port.ops = &isicom_port_ops;
 			port->magic = ISICOM_MAGIC;
 			port->card = &isi_card[idx];
 			port->channel = channel;
diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c
index 4b10770fa937..5c3dc6b8411c 100644
--- a/drivers/char/istallion.c
+++ b/drivers/char/istallion.c
@@ -151,7 +151,7 @@ static char	*stli_drvversion = "5.6.0";
 static char	*stli_serialname = "ttyE";
 
 static struct tty_driver	*stli_serial;
-
+static const struct tty_port_operations stli_port_ops;
 
 #define	STLI_TXBUFSIZE		4096
 
@@ -626,8 +626,6 @@ static int	stli_hostcmd(struct stlibrd *brdp, struct stliport *portp);
 static int	stli_initopen(struct tty_struct *tty, struct stlibrd *brdp, struct stliport *portp);
 static int	stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
 static int	stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
-static int	stli_waitcarrier(struct tty_struct *tty, struct stlibrd *brdp,
-				struct stliport *portp, struct file *filp);
 static int	stli_setport(struct tty_struct *tty);
 static int	stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
 static void	stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
@@ -769,7 +767,7 @@ static int stli_parsebrd(struct stlconf *confp, char **argp)
 			break;
 	}
 	if (i == ARRAY_SIZE(stli_brdstr)) {
-		printk("STALLION: unknown board name, %s?\n", argp[0]);
+		printk(KERN_WARNING "istallion: unknown board name, %s?\n", argp[0]);
 		return 0;
 	}
 
@@ -787,6 +785,7 @@ static int stli_open(struct tty_struct *tty, struct file *filp)
 {
 	struct stlibrd *brdp;
 	struct stliport *portp;
+	struct tty_port *port;
 	unsigned int minordev, brdnr, portnr;
 	int rc;
 
@@ -808,30 +807,19 @@ static int stli_open(struct tty_struct *tty, struct file *filp)
 		return -ENODEV;
 	if (portp->devnr < 1)
 		return -ENODEV;
-
-
-/*
- *	Check if this port is in the middle of closing. If so then wait
- *	until it is closed then return error status based on flag settings.
- *	The sleep here does not need interrupt protection since the wakeup
- *	for it is done with the same context.
- */
-	if (portp->port.flags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&portp->port.close_wait);
-		if (portp->port.flags & ASYNC_HUP_NOTIFY)
-			return -EAGAIN;
-		return -ERESTARTSYS;
-	}
+	port = &portp->port;
 
 /*
  *	On the first open of the device setup the port hardware, and
  *	initialize the per port data structure. Since initializing the port
  *	requires several commands to the board we will need to wait for any
  *	other open that is already initializing the port.
+ *
+ *	Review - locking
  */
-	tty_port_tty_set(&portp->port, tty);
+	tty_port_tty_set(port, tty);
 	tty->driver_data = portp;
-	portp->port.count++;
+	port->count++;
 
 	wait_event_interruptible(portp->raw_wait,
 			!test_bit(ST_INITIALIZING, &portp->state));
@@ -841,7 +829,8 @@ static int stli_open(struct tty_struct *tty, struct file *filp)
 	if ((portp->port.flags & ASYNC_INITIALIZED) == 0) {
 		set_bit(ST_INITIALIZING, &portp->state);
 		if ((rc = stli_initopen(tty, brdp, portp)) >= 0) {
-			portp->port.flags |= ASYNC_INITIALIZED;
+			/* Locking */
+			port->flags |= ASYNC_INITIALIZED;
 			clear_bit(TTY_IO_ERROR, &tty->flags);
 		}
 		clear_bit(ST_INITIALIZING, &portp->state);
@@ -849,31 +838,7 @@ static int stli_open(struct tty_struct *tty, struct file *filp)
 		if (rc < 0)
 			return rc;
 	}
-
-/*
- *	Check if this port is in the middle of closing. If so then wait
- *	until it is closed then return error status, based on flag settings.
- *	The sleep here does not need interrupt protection since the wakeup
- *	for it is done with the same context.
- */
-	if (portp->port.flags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&portp->port.close_wait);
-		if (portp->port.flags & ASYNC_HUP_NOTIFY)
-			return -EAGAIN;
-		return -ERESTARTSYS;
-	}
-
-/*
- *	Based on type of open being done check if it can overlap with any
- *	previous opens still in effect. If we are a normal serial device
- *	then also we might have to wait for carrier.
- */
-	if (!(filp->f_flags & O_NONBLOCK)) {
-		if ((rc = stli_waitcarrier(tty, brdp, portp, filp)) != 0)
-			return rc;
-	}
-	portp->port.flags |= ASYNC_NORMAL_ACTIVE;
-	return 0;
+	return tty_port_block_til_ready(&portp->port, tty, filp);
 }
 
 /*****************************************************************************/
@@ -882,25 +847,16 @@ static void stli_close(struct tty_struct *tty, struct file *filp)
 {
 	struct stlibrd *brdp;
 	struct stliport *portp;
+	struct tty_port *port;
 	unsigned long flags;
 
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
+	port = &portp->port;
 
-	spin_lock_irqsave(&stli_lock, flags);
-	if (tty_hung_up_p(filp)) {
-		spin_unlock_irqrestore(&stli_lock, flags);
-		return;
-	}
-	if ((tty->count == 1) && (portp->port.count != 1))
-		portp->port.count = 1;
-	if (portp->port.count-- > 1) {
-		spin_unlock_irqrestore(&stli_lock, flags);
+	if (tty_port_close_start(port, tty, filp) == 0)
 		return;
-	}
-
-	portp->port.flags |= ASYNC_CLOSING;
 
 /*
  *	May want to wait for data to drain before closing. The BUSY flag
@@ -908,15 +864,19 @@ static void stli_close(struct tty_struct *tty, struct file *filp)
  *	updated by messages from the slave - indicating when all chars
  *	really have drained.
  */
+ 	spin_lock_irqsave(&stli_lock, flags);
 	if (tty == stli_txcooktty)
 		stli_flushchars(tty);
-	tty->closing = 1;
 	spin_unlock_irqrestore(&stli_lock, flags);
 
+	/* We end up doing this twice for the moment. This needs looking at
+	   eventually. Note we still use portp->closing_wait as a result */
 	if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
 		tty_wait_until_sent(tty, portp->closing_wait);
 
-	portp->port.flags &= ~ASYNC_INITIALIZED;
+	/* FIXME: port locking here needs attending to */
+	port->flags &= ~ASYNC_INITIALIZED;
+
 	brdp = stli_brds[portp->brdnr];
 	stli_rawclose(brdp, portp, 0, 0);
 	if (tty->termios->c_cflag & HUPCL) {
@@ -934,17 +894,8 @@ static void stli_close(struct tty_struct *tty, struct file *filp)
 	set_bit(ST_DOFLUSHRX, &portp->state);
 	stli_flushbuffer(tty);
 
-	tty->closing = 0;
-	tty_port_tty_set(&portp->port, NULL);
-
-	if (portp->openwaitcnt) {
-		if (portp->close_delay)
-			msleep_interruptible(jiffies_to_msecs(portp->close_delay));
-		wake_up_interruptible(&portp->port.open_wait);
-	}
-
-	portp->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-	wake_up_interruptible(&portp->port.close_wait);
+	tty_port_close_end(port, tty);
+	tty_port_tty_set(port, NULL);
 }
 
 /*****************************************************************************/
@@ -1183,62 +1134,23 @@ static int stli_setport(struct tty_struct *tty)
 
 /*****************************************************************************/
 
-/*
- *	Possibly need to wait for carrier (DCD signal) to come high. Say
- *	maybe because if we are clocal then we don't need to wait...
- */
-
-static int stli_waitcarrier(struct tty_struct *tty, struct stlibrd *brdp,
-				struct stliport *portp, struct file *filp)
+static int stli_carrier_raised(struct tty_port *port)
 {
-	unsigned long flags;
-	int rc, doclocal;
-
-	rc = 0;
-	doclocal = 0;
-
-	if (tty->termios->c_cflag & CLOCAL)
-		doclocal++;
-
-	spin_lock_irqsave(&stli_lock, flags);
-	portp->openwaitcnt++;
-	if (! tty_hung_up_p(filp))
-		portp->port.count--;
-	spin_unlock_irqrestore(&stli_lock, flags);
-
-	for (;;) {
-		stli_mkasysigs(&portp->asig, 1, 1);
-		if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
-		    &portp->asig, sizeof(asysigs_t), 0)) < 0)
-			break;
-		if (tty_hung_up_p(filp) ||
-		    ((portp->port.flags & ASYNC_INITIALIZED) == 0)) {
-			if (portp->port.flags & ASYNC_HUP_NOTIFY)
-				rc = -EBUSY;
-			else
-				rc = -ERESTARTSYS;
-			break;
-		}
-		if (((portp->port.flags & ASYNC_CLOSING) == 0) &&
-		    (doclocal || (portp->sigs & TIOCM_CD))) {
-			break;
-		}
-		if (signal_pending(current)) {
-			rc = -ERESTARTSYS;
-			break;
-		}
-		interruptible_sleep_on(&portp->port.open_wait);
-	}
-
-	spin_lock_irqsave(&stli_lock, flags);
-	if (! tty_hung_up_p(filp))
-		portp->port.count++;
-	portp->openwaitcnt--;
-	spin_unlock_irqrestore(&stli_lock, flags);
+	struct stliport *portp = container_of(port, struct stliport, port);
+	return (portp->sigs & TIOCM_CD) ? 1 : 0;
+}
 
-	return rc;
+static void stli_raise_dtr_rts(struct tty_port *port)
+{
+	struct stliport *portp = container_of(port, struct stliport, port);
+	struct stlibrd *brdp = stli_brds[portp->brdnr];
+	stli_mkasysigs(&portp->asig, 1, 1);
+	if (stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
+		sizeof(asysigs_t), 0) < 0)
+			printk(KERN_WARNING "istallion: dtr raise failed.\n");
 }
 
+
 /*****************************************************************************/
 
 /*
@@ -1550,7 +1462,7 @@ static int stli_getserial(struct stliport *portp, struct serial_struct __user *s
 	sio.irq = 0;
 	sio.flags = portp->port.flags;
 	sio.baud_base = portp->baud_base;
-	sio.close_delay = portp->close_delay;
+	sio.close_delay = portp->port.close_delay;
 	sio.closing_wait = portp->closing_wait;
 	sio.custom_divisor = portp->custom_divisor;
 	sio.xmit_fifo_size = 0;
@@ -1582,7 +1494,7 @@ static int stli_setserial(struct tty_struct *tty, struct serial_struct __user *s
 		return -EFAULT;
 	if (!capable(CAP_SYS_ADMIN)) {
 		if ((sio.baud_base != portp->baud_base) ||
-		    (sio.close_delay != portp->close_delay) ||
+		    (sio.close_delay != portp->port.close_delay) ||
 		    ((sio.flags & ~ASYNC_USR_MASK) !=
 		    (portp->port.flags & ~ASYNC_USR_MASK)))
 			return -EPERM;
@@ -1591,7 +1503,7 @@ static int stli_setserial(struct tty_struct *tty, struct serial_struct __user *s
 	portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) |
 		(sio.flags & ASYNC_USR_MASK);
 	portp->baud_base = sio.baud_base;
-	portp->close_delay = sio.close_delay;
+	portp->port.close_delay = sio.close_delay;
 	portp->closing_wait = sio.closing_wait;
 	portp->custom_divisor = sio.custom_divisor;
 
@@ -1821,6 +1733,7 @@ static void stli_hangup(struct tty_struct *tty)
 {
 	struct stliport *portp;
 	struct stlibrd *brdp;
+	struct tty_port *port;
 	unsigned long flags;
 
 	portp = tty->driver_data;
@@ -1831,8 +1744,11 @@ static void stli_hangup(struct tty_struct *tty)
 	brdp = stli_brds[portp->brdnr];
 	if (brdp == NULL)
 		return;
+	port = &portp->port;
 
-	portp->port.flags &= ~ASYNC_INITIALIZED;
+	spin_lock_irqsave(&port->lock, flags);
+	port->flags &= ~ASYNC_INITIALIZED;
+	spin_unlock_irqrestore(&port->lock, flags);
 
 	if (!test_bit(ST_CLOSING, &portp->state))
 		stli_rawclose(brdp, portp, 0, 0);
@@ -1853,12 +1769,9 @@ static void stli_hangup(struct tty_struct *tty)
 	clear_bit(ST_TXBUSY, &portp->state);
 	clear_bit(ST_RXSTOP, &portp->state);
 	set_bit(TTY_IO_ERROR, &tty->flags);
-	tty_port_tty_set(&portp->port, NULL);
-	portp->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-	portp->port.count = 0;
 	spin_unlock_irqrestore(&stli_lock, flags);
 
-	wake_up_interruptible(&portp->port.open_wait);
+	tty_port_hangup(port);
 }
 
 /*****************************************************************************/
@@ -2132,7 +2045,7 @@ static void __stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigne
 	unsigned char __iomem *bits;
 
 	if (test_bit(ST_CMDING, &portp->state)) {
-		printk(KERN_ERR "STALLION: command already busy, cmd=%x!\n",
+		printk(KERN_ERR "istallion: command already busy, cmd=%x!\n",
 				(int) cmd);
 		return;
 	}
@@ -2692,16 +2605,17 @@ static int stli_initports(struct stlibrd *brdp)
 	for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
 		portp = kzalloc(sizeof(struct stliport), GFP_KERNEL);
 		if (!portp) {
-			printk("STALLION: failed to allocate port structure\n");
+			printk(KERN_WARNING "istallion: failed to allocate port structure\n");
 			continue;
 		}
 		tty_port_init(&portp->port);
+		portp->port.ops = &stli_port_ops;
 		portp->magic = STLI_PORTMAGIC;
 		portp->portnr = i;
 		portp->brdnr = brdp->brdnr;
 		portp->panelnr = panelnr;
 		portp->baud_base = STL_BAUDBASE;
-		portp->close_delay = STL_CLOSEDELAY;
+		portp->port.close_delay = STL_CLOSEDELAY;
 		portp->closing_wait = 30 * HZ;
 		init_waitqueue_head(&portp->port.open_wait);
 		init_waitqueue_head(&portp->port.close_wait);
@@ -2758,7 +2672,7 @@ static void __iomem *stli_ecpgetmemptr(struct stlibrd *brdp, unsigned long offse
 	unsigned char val;
 
 	if (offset > brdp->memsize) {
-		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
+		printk(KERN_ERR "istallion: shared memory pointer=%x out of "
 				"range at line=%d(%d), brd=%d\n",
 			(int) offset, line, __LINE__, brdp->brdnr);
 		ptr = NULL;
@@ -2832,7 +2746,7 @@ static void __iomem *stli_ecpeigetmemptr(struct stlibrd *brdp, unsigned long off
 	unsigned char	val;
 
 	if (offset > brdp->memsize) {
-		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
+		printk(KERN_ERR "istallion: shared memory pointer=%x out of "
 				"range at line=%d(%d), brd=%d\n",
 			(int) offset, line, __LINE__, brdp->brdnr);
 		ptr = NULL;
@@ -2884,7 +2798,7 @@ static void __iomem *stli_ecpmcgetmemptr(struct stlibrd *brdp, unsigned long off
 	unsigned char val;
 
 	if (offset > brdp->memsize) {
-		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
+		printk(KERN_ERR "istallion: shared memory pointer=%x out of "
 				"range at line=%d(%d), brd=%d\n",
 			(int) offset, line, __LINE__, brdp->brdnr);
 		ptr = NULL;
@@ -2929,7 +2843,7 @@ static void __iomem *stli_ecppcigetmemptr(struct stlibrd *brdp, unsigned long of
 	unsigned char	val;
 
 	if (offset > brdp->memsize) {
-		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
+		printk(KERN_ERR "istallion: shared memory pointer=%x out of "
 				"range at line=%d(%d), board=%d\n",
 				(int) offset, line, __LINE__, brdp->brdnr);
 		ptr = NULL;
@@ -2994,7 +2908,7 @@ static void __iomem *stli_onbgetmemptr(struct stlibrd *brdp, unsigned long offse
 	void __iomem *ptr;
 
 	if (offset > brdp->memsize) {
-		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
+		printk(KERN_ERR "istallion: shared memory pointer=%x out of "
 				"range at line=%d(%d), brd=%d\n",
 				(int) offset, line, __LINE__, brdp->brdnr);
 		ptr = NULL;
@@ -3060,7 +2974,7 @@ static void __iomem *stli_onbegetmemptr(struct stlibrd *brdp, unsigned long offs
 	unsigned char val;
 
 	if (offset > brdp->memsize) {
-		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
+		printk(KERN_ERR "istallion: shared memory pointer=%x out of "
 				"range at line=%d(%d), brd=%d\n",
 			(int) offset, line, __LINE__, brdp->brdnr);
 		ptr = NULL;
@@ -3499,7 +3413,7 @@ static int stli_startbrd(struct stlibrd *brdp)
 #endif
 
 	if (nrdevs < (brdp->nrports + 1)) {
-		printk(KERN_ERR "STALLION: slave failed to allocate memory for "
+		printk(KERN_ERR "istallion: slave failed to allocate memory for "
 				"all devices, devices=%d\n", nrdevs);
 		brdp->nrports = nrdevs - 1;
 	}
@@ -3509,13 +3423,13 @@ static int stli_startbrd(struct stlibrd *brdp)
 	brdp->bitsize = (nrdevs + 7) / 8;
 	memoff = readl(&hdrp->memp);
 	if (memoff > brdp->memsize) {
-		printk(KERN_ERR "STALLION: corrupted shared memory region?\n");
+		printk(KERN_ERR "istallion: corrupted shared memory region?\n");
 		rc = -EIO;
 		goto stli_donestartup;
 	}
 	memp = (cdkmem_t __iomem *) EBRDGETMEMPTR(brdp, memoff);
 	if (readw(&memp->dtype) != TYP_ASYNCTRL) {
-		printk(KERN_ERR "STALLION: no slave control device found\n");
+		printk(KERN_ERR "istallion: no slave control device found\n");
 		goto stli_donestartup;
 	}
 	memp++;
@@ -3600,7 +3514,7 @@ static int __devinit stli_brdinit(struct stlibrd *brdp)
 		retval = stli_initonb(brdp);
 		break;
 	default:
-		printk(KERN_ERR "STALLION: board=%d is unknown board "
+		printk(KERN_ERR "istallion: board=%d is unknown board "
 				"type=%d\n", brdp->brdnr, brdp->brdtype);
 		retval = -ENODEV;
 	}
@@ -3609,7 +3523,7 @@ static int __devinit stli_brdinit(struct stlibrd *brdp)
 		return retval;
 
 	stli_initports(brdp);
-	printk(KERN_INFO "STALLION: %s found, board=%d io=%x mem=%x "
+	printk(KERN_INFO "istallion: %s found, board=%d io=%x mem=%x "
 		"nrpanels=%d nrports=%d\n", stli_brdnames[brdp->brdtype],
 		brdp->brdnr, brdp->iobase, (int) brdp->memaddr,
 		brdp->nrpanels, brdp->nrports);
@@ -3703,7 +3617,7 @@ static int stli_eisamemprobe(struct stlibrd *brdp)
 	if (! foundit) {
 		brdp->memaddr = 0;
 		brdp->membase = NULL;
-		printk(KERN_ERR "STALLION: failed to probe shared memory "
+		printk(KERN_ERR "istallion: failed to probe shared memory "
 				"region for %s in EISA slot=%d\n",
 			stli_brdnames[brdp->brdtype], (brdp->iobase >> 12));
 		return -ENODEV;
@@ -3848,7 +3762,7 @@ static int __devinit stli_pciprobe(struct pci_dev *pdev,
 	mutex_lock(&stli_brdslock);
 	brdnr = stli_getbrdnr();
 	if (brdnr < 0) {
-		printk(KERN_INFO "STALLION: too many boards found, "
+		printk(KERN_INFO "istallion: too many boards found, "
 			"maximum supported %d\n", STL_MAXBRDS);
 		mutex_unlock(&stli_brdslock);
 		retval = -EIO;
@@ -3920,7 +3834,7 @@ static struct stlibrd *stli_allocbrd(void)
 
 	brdp = kzalloc(sizeof(struct stlibrd), GFP_KERNEL);
 	if (!brdp) {
-		printk(KERN_ERR "STALLION: failed to allocate memory "
+		printk(KERN_ERR "istallion: failed to allocate memory "
 				"(size=%Zd)\n", sizeof(struct stlibrd));
 		return NULL;
 	}
@@ -4518,6 +4432,11 @@ static const struct tty_operations stli_ops = {
 	.tiocmset = stli_tiocmset,
 };
 
+static const struct tty_port_operations stli_port_ops = {
+	.carrier_raised = stli_carrier_raised,
+	.raise_dtr_rts = stli_raise_dtr_rts,
+};
+
 /*****************************************************************************/
 /*
  *	Loadable module initialization stuff.
@@ -4554,7 +4473,7 @@ static int __init istallion_module_init(void)
 
 	stli_txcookbuf = kmalloc(STLI_TXBUFSIZE, GFP_KERNEL);
 	if (!stli_txcookbuf) {
-		printk(KERN_ERR "STALLION: failed to allocate memory "
+		printk(KERN_ERR "istallion: failed to allocate memory "
 				"(size=%d)\n", STLI_TXBUFSIZE);
 		retval = -ENOMEM;
 		goto err;
@@ -4579,7 +4498,7 @@ static int __init istallion_module_init(void)
 
 	retval = tty_register_driver(stli_serial);
 	if (retval) {
-		printk(KERN_ERR "STALLION: failed to register serial driver\n");
+		printk(KERN_ERR "istallion: failed to register serial driver\n");
 		goto err_ttyput;
 	}
 
@@ -4593,7 +4512,7 @@ static int __init istallion_module_init(void)
  */
 	retval = register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem);
 	if (retval) {
-		printk(KERN_ERR "STALLION: failed to register serial memory "
+		printk(KERN_ERR "istallion: failed to register serial memory "
 				"device\n");
 		goto err_deinit;
 	}
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 6431f6921a67..3586b3b3df3f 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -425,9 +425,6 @@ static ssize_t read_oldmem(struct file *file, char __user *buf,
 }
 #endif
 
-extern long vread(char *buf, char *addr, unsigned long count);
-extern long vwrite(char *buf, char *addr, unsigned long count);
-
 #ifdef CONFIG_DEVKMEM
 /*
  * This function reads the *virtual* memory as seen by the kernel.
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 12d327a2c9ba..8b0da97d5293 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -206,6 +206,7 @@ static void moxa_poll(unsigned long);
 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
 static void moxa_setup_empty_event(struct tty_struct *);
 static void moxa_shut_down(struct tty_struct *);
+static int moxa_carrier_raised(struct tty_port *);
 /*
  * moxa board interface functions:
  */
@@ -405,6 +406,10 @@ static const struct tty_operations moxa_ops = {
 	.tiocmset = moxa_tiocmset,
 };
 
+static const struct tty_port_operations moxa_port_ops = {
+	.carrier_raised = moxa_carrier_raised,
+};
+
 static struct tty_driver *moxaDriver;
 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
 static DEFINE_SPINLOCK(moxa_lock);
@@ -826,6 +831,7 @@ static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
 
 	for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
 		tty_port_init(&p->port);
+		p->port.ops = &moxa_port_ops;
 		p->type = PORT_16550A;
 		p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
 	}
@@ -1115,15 +1121,27 @@ static void moxa_close_port(struct tty_struct *tty)
 	tty_port_tty_set(&ch->port, NULL);
 }
 
+static int moxa_carrier_raised(struct tty_port *port)
+{
+	struct moxa_port *ch = container_of(port, struct moxa_port, port);
+	int dcd;
+
+	spin_lock_bh(&moxa_lock);
+	dcd = ch->DCDState;
+	spin_unlock_bh(&moxa_lock);
+	return dcd;
+}
+
 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
 			    struct moxa_port *ch)
 {
+	struct tty_port *port = &ch->port;
 	DEFINE_WAIT(wait);
 	int retval = 0;
 	u8 dcd;
 
 	while (1) {
-		prepare_to_wait(&ch->port.open_wait, &wait, TASK_INTERRUPTIBLE);
+		prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE);
 		if (tty_hung_up_p(filp)) {
 #ifdef SERIAL_DO_RESTART
 			retval = -ERESTARTSYS;
@@ -1132,9 +1150,7 @@ static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
 #endif
 			break;
 		}
-		spin_lock_bh(&moxa_lock);
-		dcd = ch->DCDState;
-		spin_unlock_bh(&moxa_lock);
+		dcd = tty_port_carrier_raised(port);
 		if (dcd)
 			break;
 
@@ -1144,7 +1160,7 @@ static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
 		}
 		schedule();
 	}
-	finish_wait(&ch->port.open_wait, &wait);
+	finish_wait(&port->open_wait, &wait);
 
 	return retval;
 }
diff --git a/drivers/char/mwave/mwavedd.c b/drivers/char/mwave/mwavedd.c
index 4f8d67fed292..94ad2c3bfc4a 100644
--- a/drivers/char/mwave/mwavedd.c
+++ b/drivers/char/mwave/mwavedd.c
@@ -663,7 +663,7 @@ static int __init mwave_init(void)
 #if 0
 	/* sysfs */
 	memset(&mwave_device, 0, sizeof (struct device));
-	snprintf(mwave_device.bus_id, BUS_ID_SIZE, "mwave");
+	dev_set_name(&mwave_device, "mwave");
 
 	if (device_register(&mwave_device))
 		goto cleanup_error;
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 047766915411..402c9f217f83 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -541,74 +541,21 @@ static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 	return status;
 }
 
-static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
-		struct mxser_port *port)
+static int mxser_carrier_raised(struct tty_port *port)
 {
-	DECLARE_WAITQUEUE(wait, current);
-	int retval;
-	int do_clocal = 0;
-	unsigned long flags;
-
-	/*
-	 * If non-blocking mode is set, or the port is not enabled,
-	 * then make the check up front and then exit.
-	 */
-	if ((filp->f_flags & O_NONBLOCK) ||
-			test_bit(TTY_IO_ERROR, &tty->flags)) {
-		port->port.flags |= ASYNC_NORMAL_ACTIVE;
-		return 0;
-	}
+	struct mxser_port *mp = container_of(port, struct mxser_port, port);
+	return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
+}
 
-	if (tty->termios->c_cflag & CLOCAL)
-		do_clocal = 1;
+static void mxser_raise_dtr_rts(struct tty_port *port)
+{
+	struct mxser_port *mp = container_of(port, struct mxser_port, port);
+	unsigned long flags;
 
-	/*
-	 * Block waiting for the carrier detect and the line to become
-	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, port->port.count is dropped by one, so that
-	 * mxser_close() knows when to free things.  We restore it upon
-	 * exit, either normal or abnormal.
-	 */
-	retval = 0;
-	add_wait_queue(&port->port.open_wait, &wait);
-
-	spin_lock_irqsave(&port->slock, flags);
-	if (!tty_hung_up_p(filp))
-		port->port.count--;
-	spin_unlock_irqrestore(&port->slock, flags);
-	port->port.blocked_open++;
-	while (1) {
-		spin_lock_irqsave(&port->slock, flags);
-		outb(inb(port->ioaddr + UART_MCR) |
-			UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
-		spin_unlock_irqrestore(&port->slock, flags);
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
-			if (port->port.flags & ASYNC_HUP_NOTIFY)
-				retval = -EAGAIN;
-			else
-				retval = -ERESTARTSYS;
-			break;
-		}
-		if (!(port->port.flags & ASYNC_CLOSING) &&
-				(do_clocal ||
-				(inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-		schedule();
-	}
-	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&port->port.open_wait, &wait);
-	if (!tty_hung_up_p(filp))
-		port->port.count++;
-	port->port.blocked_open--;
-	if (retval)
-		return retval;
-	port->port.flags |= ASYNC_NORMAL_ACTIVE;
-	return 0;
+	spin_lock_irqsave(&mp->slock, flags);
+	outb(inb(mp->ioaddr + UART_MCR) |
+		UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
+	spin_unlock_irqrestore(&mp->slock, flags);
 }
 
 static int mxser_set_baud(struct tty_struct *tty, long newspd)
@@ -1087,14 +1034,14 @@ static int mxser_open(struct tty_struct *tty, struct file *filp)
 	/*
 	 * Start up serial port
 	 */
-	spin_lock_irqsave(&info->slock, flags);
+	spin_lock_irqsave(&info->port.lock, flags);
 	info->port.count++;
-	spin_unlock_irqrestore(&info->slock, flags);
+	spin_unlock_irqrestore(&info->port.lock, flags);
 	retval = mxser_startup(tty);
 	if (retval)
 		return retval;
 
-	retval = mxser_block_til_ready(tty, filp, info);
+	retval = tty_port_block_til_ready(&info->port, tty, filp);
 	if (retval)
 		return retval;
 
@@ -1133,58 +1080,27 @@ static void mxser_flush_buffer(struct tty_struct *tty)
 static void mxser_close(struct tty_struct *tty, struct file *filp)
 {
 	struct mxser_port *info = tty->driver_data;
+	struct tty_port *port = &info->port;
 
 	unsigned long timeout;
-	unsigned long flags;
 
 	if (tty->index == MXSER_PORTS)
 		return;
 	if (!info)
 		return;
 
-	spin_lock_irqsave(&info->slock, flags);
-
-	if (tty_hung_up_p(filp)) {
-		spin_unlock_irqrestore(&info->slock, flags);
-		return;
-	}
-	if ((tty->count == 1) && (info->port.count != 1)) {
-		/*
-		 * Uh, oh.  tty->count is 1, which means that the tty
-		 * structure will be freed.  Info->port.count should always
-		 * be one in these conditions.  If it's greater than
-		 * one, we've got real problems, since it means the
-		 * serial port won't be shutdown.
-		 */
-		printk(KERN_ERR "mxser_close: bad serial port count; "
-			"tty->count is 1, info->port.count is %d\n", info->port.count);
-		info->port.count = 1;
-	}
-	if (--info->port.count < 0) {
-		printk(KERN_ERR "mxser_close: bad serial port count for "
-			"ttys%d: %d\n", tty->index, info->port.count);
-		info->port.count = 0;
-	}
-	if (info->port.count) {
-		spin_unlock_irqrestore(&info->slock, flags);
+	if (tty_port_close_start(port, tty, filp) == 0)
 		return;
-	}
-	info->port.flags |= ASYNC_CLOSING;
-	spin_unlock_irqrestore(&info->slock, flags);
+
 	/*
 	 * Save the termios structure, since this port may have
 	 * separate termios for callout and dialin.
+	 *
+	 * FIXME: Can this go ?
 	 */
 	if (info->port.flags & ASYNC_NORMAL_ACTIVE)
 		info->normal_termios = *tty->termios;
 	/*
-	 * Now we wait for the transmit buffer to clear; and we notify
-	 * the line discipline to only process XON/XOFF characters.
-	 */
-	tty->closing = 1;
-	if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
-		tty_wait_until_sent(tty, info->port.closing_wait);
-	/*
 	 * At this point we stop accepting input.  To do this, we
 	 * disable the receive line status interrupts, and tell the
 	 * interrupt driver to stop checking the data ready bit in the
@@ -1209,19 +1125,12 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 		}
 	}
 	mxser_shutdown(tty);
-
 	mxser_flush_buffer(tty);
-	tty_ldisc_flush(tty);
-
-	tty->closing = 0;
-	tty_port_tty_set(&info->port, NULL);
-	if (info->port.blocked_open) {
-		if (info->port.close_delay)
-			schedule_timeout_interruptible(info->port.close_delay);
-		wake_up_interruptible(&info->port.open_wait);
-	}
 
-	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+	/* Right now the tty_port set is done outside of the close_end helper
+	   as we don't yet have everyone using refcounts */	
+	tty_port_close_end(port, tty);
+	tty_port_tty_set(port, NULL);
 }
 
 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
@@ -2146,10 +2055,7 @@ static void mxser_hangup(struct tty_struct *tty)
 
 	mxser_flush_buffer(tty);
 	mxser_shutdown(tty);
-	info->port.count = 0;
-	info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-	tty_port_tty_set(&info->port, NULL);
-	wake_up_interruptible(&info->port.open_wait);
+	tty_port_hangup(&info->port);
 }
 
 /*
@@ -2449,6 +2355,11 @@ static const struct tty_operations mxser_ops = {
 	.tiocmset = mxser_tiocmset,
 };
 
+struct tty_port_operations mxser_port_ops = {
+	.carrier_raised = mxser_carrier_raised,
+	.raise_dtr_rts = mxser_raise_dtr_rts,
+};
+
 /*
  * The MOXA Smartio/Industio serial driver boot-time initialization code!
  */
@@ -2482,6 +2393,7 @@ static int __devinit mxser_initbrd(struct mxser_board *brd,
 	for (i = 0; i < brd->info->nports; i++) {
 		info = &brd->ports[i];
 		tty_port_init(&info->port);
+		info->port.ops = &mxser_port_ops;
 		info->board = brd;
 		info->stop_rx = 0;
 		info->ldisc_stop_rx = 0;
diff --git a/drivers/char/n_r3964.c b/drivers/char/n_r3964.c
index 4a8215a89ad3..d2e93e343226 100644
--- a/drivers/char/n_r3964.c
+++ b/drivers/char/n_r3964.c
@@ -1003,7 +1003,7 @@ static int r3964_open(struct tty_struct *tty)
 
 static void r3964_close(struct tty_struct *tty)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	struct r3964_client_info *pClient, *pNext;
 	struct r3964_message *pMsg;
 	struct r3964_block_header *pHeader, *pNextHeader;
@@ -1058,7 +1058,7 @@ static void r3964_close(struct tty_struct *tty)
 static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
 			  unsigned char __user * buf, size_t nr)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	struct r3964_client_info *pClient;
 	struct r3964_message *pMsg;
 	struct r3964_client_message theMsg;
@@ -1113,7 +1113,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
 static ssize_t r3964_write(struct tty_struct *tty, struct file *file,
 			   const unsigned char *data, size_t count)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	struct r3964_block_header *pHeader;
 	struct r3964_client_info *pClient;
 	unsigned char *new_data;
@@ -1182,7 +1182,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file,
 static int r3964_ioctl(struct tty_struct *tty, struct file *file,
 		unsigned int cmd, unsigned long arg)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	if (pInfo == NULL)
 		return -EINVAL;
 	switch (cmd) {
@@ -1216,7 +1216,7 @@ static void r3964_set_termios(struct tty_struct *tty, struct ktermios *old)
 static unsigned int r3964_poll(struct tty_struct *tty, struct file *file,
 			struct poll_table_struct *wait)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	struct r3964_client_info *pClient;
 	struct r3964_message *pMsg = NULL;
 	unsigned long flags;
@@ -1241,7 +1241,7 @@ static unsigned int r3964_poll(struct tty_struct *tty, struct file *file,
 static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 			char *fp, int count)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	const unsigned char *p;
 	char *f, flags = 0;
 	int i;
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index efbfe9612658..f6f0e4ec2b51 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -47,8 +47,8 @@
 #include <linux/bitops.h>
 #include <linux/audit.h>
 #include <linux/file.h>
+#include <linux/uaccess.h>
 
-#include <asm/uaccess.h>
 #include <asm/system.h>
 
 /* number of characters left in xmit buffer before select has we have room */
@@ -62,6 +62,17 @@
 #define TTY_THRESHOLD_THROTTLE		128 /* now based on remaining room */
 #define TTY_THRESHOLD_UNTHROTTLE 	128
 
+/*
+ * Special byte codes used in the echo buffer to represent operations
+ * or special handling of characters.  Bytes in the echo buffer that
+ * are not part of such special blocks are treated as normal character
+ * codes.
+ */
+#define ECHO_OP_START 0xff
+#define ECHO_OP_MOVE_BACK_COL 0x80
+#define ECHO_OP_SET_CANON_COL 0x81
+#define ECHO_OP_ERASE_TAB 0x82
+
 static inline unsigned char *alloc_buf(void)
 {
 	gfp_t prio = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
@@ -169,6 +180,7 @@ static void check_unthrottle(struct tty_struct *tty)
  *
  *	Locking: tty_read_lock for read fields.
  */
+
 static void reset_buffer_flags(struct tty_struct *tty)
 {
 	unsigned long flags;
@@ -176,6 +188,11 @@ static void reset_buffer_flags(struct tty_struct *tty)
 	spin_lock_irqsave(&tty->read_lock, flags);
 	tty->read_head = tty->read_tail = tty->read_cnt = 0;
 	spin_unlock_irqrestore(&tty->read_lock, flags);
+
+	mutex_lock(&tty->echo_lock);
+	tty->echo_pos = tty->echo_cnt = tty->echo_overrun = 0;
+	mutex_unlock(&tty->echo_lock);
+
 	tty->canon_head = tty->canon_data = tty->erasing = 0;
 	memset(&tty->read_flags, 0, sizeof tty->read_flags);
 	n_tty_set_room(tty);
@@ -266,89 +283,118 @@ static inline int is_continuation(unsigned char c, struct tty_struct *tty)
 }
 
 /**
- *	opost			-	output post processor
+ *	do_output_char			-	output one character
  *	@c: character (or partial unicode symbol)
  *	@tty: terminal device
+ *	@space: space available in tty driver write buffer
  *
- *	Perform OPOST processing.  Returns -1 when the output device is
- *	full and the character must be retried. Note that Linux currently
- *	ignores TABDLY, CRDLY, VTDLY, FFDLY and NLDLY. They simply aren't
- *	relevant in the world today. If you ever need them, add them here.
+ *	This is a helper function that handles one output character
+ *	(including special characters like TAB, CR, LF, etc.),
+ *	putting the results in the tty driver's write buffer.
+ *
+ *	Note that Linux currently ignores TABDLY, CRDLY, VTDLY, FFDLY
+ *	and NLDLY.  They simply aren't relevant in the world today.
+ *	If you ever need them, add them here.
+ *
+ *	Returns the number of bytes of buffer space used or -1 if
+ *	no space left.
  *
- *	Called from both the receive and transmit sides and can be called
- *	re-entrantly. Relies on lock_kernel() for tty->column state.
+ *	Locking: should be called under the output_lock to protect
+ *		 the column state and space left in the buffer
  */
 
-static int opost(unsigned char c, struct tty_struct *tty)
+static int do_output_char(unsigned char c, struct tty_struct *tty, int space)
 {
-	int	space, spaces;
+	int	spaces;
 
-	space = tty_write_room(tty);
 	if (!space)
 		return -1;
 
-	lock_kernel();
-	if (O_OPOST(tty)) {
-		switch (c) {
-		case '\n':
-			if (O_ONLRET(tty))
-				tty->column = 0;
-			if (O_ONLCR(tty)) {
-				if (space < 2) {
-					unlock_kernel();
-					return -1;
-				}
-				tty_put_char(tty, '\r');
-				tty->column = 0;
-			}
-			tty->canon_column = tty->column;
-			break;
-		case '\r':
-			if (O_ONOCR(tty) && tty->column == 0) {
-				unlock_kernel();
-				return 0;
-			}
-			if (O_OCRNL(tty)) {
-				c = '\n';
-				if (O_ONLRET(tty))
-					tty->canon_column = tty->column = 0;
-				break;
-			}
+	switch (c) {
+	case '\n':
+		if (O_ONLRET(tty))
+			tty->column = 0;
+		if (O_ONLCR(tty)) {
+			if (space < 2)
+				return -1;
 			tty->canon_column = tty->column = 0;
+			tty_put_char(tty, '\r');
+			tty_put_char(tty, c);
+			return 2;
+		}
+		tty->canon_column = tty->column;
+		break;
+	case '\r':
+		if (O_ONOCR(tty) && tty->column == 0)
+			return 0;
+		if (O_OCRNL(tty)) {
+			c = '\n';
+			if (O_ONLRET(tty))
+				tty->canon_column = tty->column = 0;
 			break;
-		case '\t':
-			spaces = 8 - (tty->column & 7);
-			if (O_TABDLY(tty) == XTABS) {
-				if (space < spaces) {
-					unlock_kernel();
-					return -1;
-				}
-				tty->column += spaces;
-				tty->ops->write(tty, "        ", spaces);
-				unlock_kernel();
-				return 0;
-			}
+		}
+		tty->canon_column = tty->column = 0;
+		break;
+	case '\t':
+		spaces = 8 - (tty->column & 7);
+		if (O_TABDLY(tty) == XTABS) {
+			if (space < spaces)
+				return -1;
 			tty->column += spaces;
-			break;
-		case '\b':
-			if (tty->column > 0)
-				tty->column--;
-			break;
-		default:
+			tty->ops->write(tty, "        ", spaces);
+			return spaces;
+		}
+		tty->column += spaces;
+		break;
+	case '\b':
+		if (tty->column > 0)
+			tty->column--;
+		break;
+	default:
+		if (!iscntrl(c)) {
 			if (O_OLCUC(tty))
 				c = toupper(c);
-			if (!iscntrl(c) && !is_continuation(c, tty))
+			if (!is_continuation(c, tty))
 				tty->column++;
-			break;
 		}
+		break;
 	}
+
 	tty_put_char(tty, c);
-	unlock_kernel();
-	return 0;
+	return 1;
 }
 
 /**
- *	opost_block		-	block postprocess
+ *	process_output			-	output post processor
+ *	@c: character (or partial unicode symbol)
+ *	@tty: terminal device
+ *
+ *	Perform OPOST processing.  Returns -1 when the output device is
+ *	full and the character must be retried.
+ *
+ *	Locking: output_lock to protect column state and space left
+ *		 (also, this is called from n_tty_write under the
+ *		  tty layer write lock)
+ */
+
+static int process_output(unsigned char c, struct tty_struct *tty)
+{
+	int	space, retval;
+
+	mutex_lock(&tty->output_lock);
+
+	space = tty_write_room(tty);
+	retval = do_output_char(c, tty, space);
+
+	mutex_unlock(&tty->output_lock);
+	if (retval < 0)
+		return -1;
+	else
+		return 0;
+}
+
+/**
+ *	process_output_block		-	block post processor
  *	@tty: terminal device
  *	@inbuf: user buffer
  *	@nr: number of bytes
@@ -358,26 +404,32 @@ static int opost(unsigned char c, struct tty_struct *tty)
  *	the simple cases normally found and helps to generate blocks of
  *	symbols for the console driver and thus improve performance.
  *
- *	Called from n_tty_write under the tty layer write lock. Relies
- *	on lock_kernel for the tty->column state.
+ *	Locking: output_lock to protect column state and space left
+ *		 (also, this is called from n_tty_write under the
+ *		  tty layer write lock)
  */
 
-static ssize_t opost_block(struct tty_struct *tty,
-		       const unsigned char *buf, unsigned int nr)
+static ssize_t process_output_block(struct tty_struct *tty,
+				    const unsigned char *buf, unsigned int nr)
 {
 	int	space;
 	int 	i;
 	const unsigned char *cp;
 
+	mutex_lock(&tty->output_lock);
+
 	space = tty_write_room(tty);
-	if (!space)
+	if (!space) {
+		mutex_unlock(&tty->output_lock);
 		return 0;
+	}
 	if (nr > space)
 		nr = space;
 
-	lock_kernel();
 	for (i = 0, cp = buf; i < nr; i++, cp++) {
-		switch (*cp) {
+		unsigned char c = *cp;
+
+		switch (c) {
 		case '\n':
 			if (O_ONLRET(tty))
 				tty->column = 0;
@@ -399,54 +451,403 @@ static ssize_t opost_block(struct tty_struct *tty,
 				tty->column--;
 			break;
 		default:
-			if (O_OLCUC(tty))
-				goto break_out;
-			if (!iscntrl(*cp))
-				tty->column++;
+			if (!iscntrl(c)) {
+				if (O_OLCUC(tty))
+					goto break_out;
+				if (!is_continuation(c, tty))
+					tty->column++;
+			}
 			break;
 		}
 	}
 break_out:
-	if (tty->ops->flush_chars)
-		tty->ops->flush_chars(tty);
 	i = tty->ops->write(tty, buf, i);
-	unlock_kernel();
+
+	mutex_unlock(&tty->output_lock);
 	return i;
 }
 
+/**
+ *	process_echoes	-	write pending echo characters
+ *	@tty: terminal device
+ *
+ *	Write previously buffered echo (and other ldisc-generated)
+ *	characters to the tty.
+ *
+ *	Characters generated by the ldisc (including echoes) need to
+ *	be buffered because the driver's write buffer can fill during
+ *	heavy program output.  Echoing straight to the driver will
+ *	often fail under these conditions, causing lost characters and
+ *	resulting mismatches of ldisc state information.
+ *
+ *	Since the ldisc state must represent the characters actually sent
+ *	to the driver at the time of the write, operations like certain
+ *	changes in column state are also saved in the buffer and executed
+ *	here.
+ *
+ *	A circular fifo buffer is used so that the most recent characters
+ *	are prioritized.  Also, when control characters are echoed with a
+ *	prefixed "^", the pair is treated atomically and thus not separated.
+ *
+ *	Locking: output_lock to protect column state and space left,
+ *		 echo_lock to protect the echo buffer
+ */
+
+static void process_echoes(struct tty_struct *tty)
+{
+	int	space, nr;
+	unsigned char c;
+	unsigned char *cp, *buf_end;
+
+	if (!tty->echo_cnt)
+		return;
+
+	mutex_lock(&tty->output_lock);
+	mutex_lock(&tty->echo_lock);
+
+	space = tty_write_room(tty);
+
+	buf_end = tty->echo_buf + N_TTY_BUF_SIZE;
+	cp = tty->echo_buf + tty->echo_pos;
+	nr = tty->echo_cnt;
+	while (nr > 0) {
+		c = *cp;
+		if (c == ECHO_OP_START) {
+			unsigned char op;
+			unsigned char *opp;
+			int no_space_left = 0;
+
+			/*
+			 * If the buffer byte is the start of a multi-byte
+			 * operation, get the next byte, which is either the
+			 * op code or a control character value.
+			 */
+			opp = cp + 1;
+			if (opp == buf_end)
+				opp -= N_TTY_BUF_SIZE;
+			op = *opp;
+
+			switch (op) {
+				unsigned int num_chars, num_bs;
+
+			case ECHO_OP_ERASE_TAB:
+				if (++opp == buf_end)
+					opp -= N_TTY_BUF_SIZE;
+				num_chars = *opp;
+
+				/*
+				 * Determine how many columns to go back
+				 * in order to erase the tab.
+				 * This depends on the number of columns
+				 * used by other characters within the tab
+				 * area.  If this (modulo 8) count is from
+				 * the start of input rather than from a
+				 * previous tab, we offset by canon column.
+				 * Otherwise, tab spacing is normal.
+				 */
+				if (!(num_chars & 0x80))
+					num_chars += tty->canon_column;
+				num_bs = 8 - (num_chars & 7);
+
+				if (num_bs > space) {
+					no_space_left = 1;
+					break;
+				}
+				space -= num_bs;
+				while (num_bs--) {
+					tty_put_char(tty, '\b');
+					if (tty->column > 0)
+						tty->column--;
+				}
+				cp += 3;
+				nr -= 3;
+				break;
+
+			case ECHO_OP_SET_CANON_COL:
+				tty->canon_column = tty->column;
+				cp += 2;
+				nr -= 2;
+				break;
+
+			case ECHO_OP_MOVE_BACK_COL:
+				if (tty->column > 0)
+					tty->column--;
+				cp += 2;
+				nr -= 2;
+				break;
+
+			case ECHO_OP_START:
+				/* This is an escaped echo op start code */
+				if (!space) {
+					no_space_left = 1;
+					break;
+				}
+				tty_put_char(tty, ECHO_OP_START);
+				tty->column++;
+				space--;
+				cp += 2;
+				nr -= 2;
+				break;
+
+			default:
+				if (iscntrl(op)) {
+					if (L_ECHOCTL(tty)) {
+						/*
+						 * Ensure there is enough space
+						 * for the whole ctrl pair.
+						 */
+						if (space < 2) {
+							no_space_left = 1;
+							break;
+						}
+						tty_put_char(tty, '^');
+						tty_put_char(tty, op ^ 0100);
+						tty->column += 2;
+						space -= 2;
+					} else {
+						if (!space) {
+							no_space_left = 1;
+							break;
+						}
+						tty_put_char(tty, op);
+						space--;
+					}
+				}
+				/*
+				 * If above falls through, this was an
+				 * undefined op.
+				 */
+				cp += 2;
+				nr -= 2;
+			}
+
+			if (no_space_left)
+				break;
+		} else {
+			int retval;
+
+			retval = do_output_char(c, tty, space);
+			if (retval < 0)
+				break;
+			space -= retval;
+			cp += 1;
+			nr -= 1;
+		}
+
+		/* When end of circular buffer reached, wrap around */
+		if (cp >= buf_end)
+			cp -= N_TTY_BUF_SIZE;
+	}
+
+	if (nr == 0) {
+		tty->echo_pos = 0;
+		tty->echo_cnt = 0;
+		tty->echo_overrun = 0;
+	} else {
+		int num_processed = tty->echo_cnt - nr;
+		tty->echo_pos += num_processed;
+		tty->echo_pos &= N_TTY_BUF_SIZE - 1;
+		tty->echo_cnt = nr;
+		if (num_processed > 0)
+			tty->echo_overrun = 0;
+	}
+
+	mutex_unlock(&tty->echo_lock);
+	mutex_unlock(&tty->output_lock);
+
+	if (tty->ops->flush_chars)
+		tty->ops->flush_chars(tty);
+}
 
 /**
- *	echo_char	-	echo characters
+ *	add_echo_byte	-	add a byte to the echo buffer
+ *	@c: unicode byte to echo
+ *	@tty: terminal device
+ *
+ *	Add a character or operation byte to the echo buffer.
+ *
+ *	Should be called under the echo lock to protect the echo buffer.
+ */
+
+static void add_echo_byte(unsigned char c, struct tty_struct *tty)
+{
+	int	new_byte_pos;
+
+	if (tty->echo_cnt == N_TTY_BUF_SIZE) {
+		/* Circular buffer is already at capacity */
+		new_byte_pos = tty->echo_pos;
+
+		/*
+		 * Since the buffer start position needs to be advanced,
+		 * be sure to step by a whole operation byte group.
+		 */
+		if (tty->echo_buf[tty->echo_pos] == ECHO_OP_START) {
+			if (tty->echo_buf[(tty->echo_pos + 1) &
+					  (N_TTY_BUF_SIZE - 1)] ==
+						ECHO_OP_ERASE_TAB) {
+				tty->echo_pos += 3;
+				tty->echo_cnt -= 2;
+			} else {
+				tty->echo_pos += 2;
+				tty->echo_cnt -= 1;
+			}
+		} else {
+			tty->echo_pos++;
+		}
+		tty->echo_pos &= N_TTY_BUF_SIZE - 1;
+
+		tty->echo_overrun = 1;
+	} else {
+		new_byte_pos = tty->echo_pos + tty->echo_cnt;
+		new_byte_pos &= N_TTY_BUF_SIZE - 1;
+		tty->echo_cnt++;
+	}
+
+	tty->echo_buf[new_byte_pos] = c;
+}
+
+/**
+ *	echo_move_back_col	-	add operation to move back a column
+ *	@tty: terminal device
+ *
+ *	Add an operation to the echo buffer to move back one column.
+ *
+ *	Locking: echo_lock to protect the echo buffer
+ */
+
+static void echo_move_back_col(struct tty_struct *tty)
+{
+	mutex_lock(&tty->echo_lock);
+
+	add_echo_byte(ECHO_OP_START, tty);
+	add_echo_byte(ECHO_OP_MOVE_BACK_COL, tty);
+
+	mutex_unlock(&tty->echo_lock);
+}
+
+/**
+ *	echo_set_canon_col	-	add operation to set the canon column
+ *	@tty: terminal device
+ *
+ *	Add an operation to the echo buffer to set the canon column
+ *	to the current column.
+ *
+ *	Locking: echo_lock to protect the echo buffer
+ */
+
+static void echo_set_canon_col(struct tty_struct *tty)
+{
+	mutex_lock(&tty->echo_lock);
+
+	add_echo_byte(ECHO_OP_START, tty);
+	add_echo_byte(ECHO_OP_SET_CANON_COL, tty);
+
+	mutex_unlock(&tty->echo_lock);
+}
+
+/**
+ *	echo_erase_tab	-	add operation to erase a tab
+ *	@num_chars: number of character columns already used
+ *	@after_tab: true if num_chars starts after a previous tab
+ *	@tty: terminal device
+ *
+ *	Add an operation to the echo buffer to erase a tab.
+ *
+ *	Called by the eraser function, which knows how many character
+ *	columns have been used since either a previous tab or the start
+ *	of input.  This information will be used later, along with
+ *	canon column (if applicable), to go back the correct number
+ *	of columns.
+ *
+ *	Locking: echo_lock to protect the echo buffer
+ */
+
+static void echo_erase_tab(unsigned int num_chars, int after_tab,
+			   struct tty_struct *tty)
+{
+	mutex_lock(&tty->echo_lock);
+
+	add_echo_byte(ECHO_OP_START, tty);
+	add_echo_byte(ECHO_OP_ERASE_TAB, tty);
+
+	/* We only need to know this modulo 8 (tab spacing) */
+	num_chars &= 7;
+
+	/* Set the high bit as a flag if num_chars is after a previous tab */
+	if (after_tab)
+		num_chars |= 0x80;
+
+	add_echo_byte(num_chars, tty);
+
+	mutex_unlock(&tty->echo_lock);
+}
+
+/**
+ *	echo_char_raw	-	echo a character raw
  *	@c: unicode byte to echo
  *	@tty: terminal device
  *
  *	Echo user input back onto the screen. This must be called only when
  *	L_ECHO(tty) is true. Called from the driver receive_buf path.
  *
- *	Relies on BKL for tty column locking
+ *	This variant does not treat control characters specially.
+ *
+ *	Locking: echo_lock to protect the echo buffer
+ */
+
+static void echo_char_raw(unsigned char c, struct tty_struct *tty)
+{
+	mutex_lock(&tty->echo_lock);
+
+	if (c == ECHO_OP_START) {
+		add_echo_byte(ECHO_OP_START, tty);
+		add_echo_byte(ECHO_OP_START, tty);
+	} else {
+		add_echo_byte(c, tty);
+	}
+
+	mutex_unlock(&tty->echo_lock);
+}
+
+/**
+ *	echo_char	-	echo a character
+ *	@c: unicode byte to echo
+ *	@tty: terminal device
+ *
+ *	Echo user input back onto the screen. This must be called only when
+ *	L_ECHO(tty) is true. Called from the driver receive_buf path.
+ *
+ *	This variant tags control characters to be possibly echoed as
+ *	as "^X" (where X is the letter representing the control char).
+ *
+ *	Locking: echo_lock to protect the echo buffer
  */
 
 static void echo_char(unsigned char c, struct tty_struct *tty)
 {
-	if (L_ECHOCTL(tty) && iscntrl(c) && c != '\t') {
-		tty_put_char(tty, '^');
-		tty_put_char(tty, c ^ 0100);
-		tty->column += 2;
-	} else
-		opost(c, tty);
+	mutex_lock(&tty->echo_lock);
+
+	if (c == ECHO_OP_START) {
+		add_echo_byte(ECHO_OP_START, tty);
+		add_echo_byte(ECHO_OP_START, tty);
+	} else {
+		if (iscntrl(c) && c != '\t')
+			add_echo_byte(ECHO_OP_START, tty);
+		add_echo_byte(c, tty);
+	}
+
+	mutex_unlock(&tty->echo_lock);
 }
 
 /**
- *	finsh_erasing		-	complete erase
+ *	finish_erasing		-	complete erase
  *	@tty: tty doing the erase
- *
- *	Relies on BKL for tty column locking
  */
+
 static inline void finish_erasing(struct tty_struct *tty)
 {
 	if (tty->erasing) {
-		tty_put_char(tty, '/');
-		tty->column++;
+		echo_char_raw('/', tty);
 		tty->erasing = 0;
 	}
 }
@@ -460,7 +861,7 @@ static inline void finish_erasing(struct tty_struct *tty)
  *	present in the stream from the driver layer. Handles the complexities
  *	of UTF-8 multibyte symbols.
  *
- *	Locking: read_lock for tty buffers, BKL for column/erasing state
+ *	Locking: read_lock for tty buffers
  */
 
 static void eraser(unsigned char c, struct tty_struct *tty)
@@ -471,7 +872,7 @@ static void eraser(unsigned char c, struct tty_struct *tty)
 
 	/* FIXME: locking needed ? */
 	if (tty->read_head == tty->canon_head) {
-		/* opost('\a', tty); */		/* what do you think? */
+		/* process_output('\a', tty); */ /* what do you think? */
 		return;
 	}
 	if (c == ERASE_CHAR(tty))
@@ -497,7 +898,7 @@ static void eraser(unsigned char c, struct tty_struct *tty)
 			echo_char(KILL_CHAR(tty), tty);
 			/* Add a newline if ECHOK is on and ECHOKE is off. */
 			if (L_ECHOK(tty))
-				opost('\n', tty);
+				echo_char_raw('\n', tty);
 			return;
 		}
 		kill_type = KILL;
@@ -533,67 +934,61 @@ static void eraser(unsigned char c, struct tty_struct *tty)
 		if (L_ECHO(tty)) {
 			if (L_ECHOPRT(tty)) {
 				if (!tty->erasing) {
-					tty_put_char(tty, '\\');
-					tty->column++;
+					echo_char_raw('\\', tty);
 					tty->erasing = 1;
 				}
 				/* if cnt > 1, output a multi-byte character */
 				echo_char(c, tty);
 				while (--cnt > 0) {
 					head = (head+1) & (N_TTY_BUF_SIZE-1);
-					tty_put_char(tty, tty->read_buf[head]);
+					echo_char_raw(tty->read_buf[head], tty);
+					echo_move_back_col(tty);
 				}
 			} else if (kill_type == ERASE && !L_ECHOE(tty)) {
 				echo_char(ERASE_CHAR(tty), tty);
 			} else if (c == '\t') {
-				unsigned int col = tty->canon_column;
-				unsigned long tail = tty->canon_head;
-
-				/* Find the column of the last char. */
-				while (tail != tty->read_head) {
+				unsigned int num_chars = 0;
+				int after_tab = 0;
+				unsigned long tail = tty->read_head;
+
+				/*
+				 * Count the columns used for characters
+				 * since the start of input or after a
+				 * previous tab.
+				 * This info is used to go back the correct
+				 * number of columns.
+				 */
+				while (tail != tty->canon_head) {
+					tail = (tail-1) & (N_TTY_BUF_SIZE-1);
 					c = tty->read_buf[tail];
-					if (c == '\t')
-						col = (col | 7) + 1;
-					else if (iscntrl(c)) {
+					if (c == '\t') {
+						after_tab = 1;
+						break;
+					} else if (iscntrl(c)) {
 						if (L_ECHOCTL(tty))
-							col += 2;
-					} else if (!is_continuation(c, tty))
-						col++;
-					tail = (tail+1) & (N_TTY_BUF_SIZE-1);
-				}
-
-				/* should never happen */
-				if (tty->column > 0x80000000)
-					tty->column = 0;
-
-				/* Now backup to that column. */
-				while (tty->column > col) {
-					/* Can't use opost here. */
-					tty_put_char(tty, '\b');
-					if (tty->column > 0)
-						tty->column--;
+							num_chars += 2;
+					} else if (!is_continuation(c, tty)) {
+						num_chars++;
+					}
 				}
+				echo_erase_tab(num_chars, after_tab, tty);
 			} else {
 				if (iscntrl(c) && L_ECHOCTL(tty)) {
-					tty_put_char(tty, '\b');
-					tty_put_char(tty, ' ');
-					tty_put_char(tty, '\b');
-					if (tty->column > 0)
-						tty->column--;
+					echo_char_raw('\b', tty);
+					echo_char_raw(' ', tty);
+					echo_char_raw('\b', tty);
 				}
 				if (!iscntrl(c) || L_ECHOCTL(tty)) {
-					tty_put_char(tty, '\b');
-					tty_put_char(tty, ' ');
-					tty_put_char(tty, '\b');
-					if (tty->column > 0)
-						tty->column--;
+					echo_char_raw('\b', tty);
+					echo_char_raw(' ', tty);
+					echo_char_raw('\b', tty);
 				}
 			}
 		}
 		if (kill_type == ERASE)
 			break;
 	}
-	if (tty->read_head == tty->canon_head)
+	if (tty->read_head == tty->canon_head && L_ECHO(tty))
 		finish_erasing(tty);
 }
 
@@ -712,6 +1107,7 @@ static inline void n_tty_receive_parity_error(struct tty_struct *tty,
 static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
 {
 	unsigned long flags;
+	int parmrk;
 
 	if (tty->raw) {
 		put_tty_queue(c, tty);
@@ -721,18 +1117,21 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
 	if (I_ISTRIP(tty))
 		c &= 0x7f;
 	if (I_IUCLC(tty) && L_IEXTEN(tty))
-		c=tolower(c);
+		c = tolower(c);
 
 	if (tty->stopped && !tty->flow_stopped && I_IXON(tty) &&
-	    ((I_IXANY(tty) && c != START_CHAR(tty) && c != STOP_CHAR(tty)) ||
-	     c == INTR_CHAR(tty) || c == QUIT_CHAR(tty) || c == SUSP_CHAR(tty)))
+	    I_IXANY(tty) && c != START_CHAR(tty) && c != STOP_CHAR(tty) &&
+	    c != INTR_CHAR(tty) && c != QUIT_CHAR(tty) && c != SUSP_CHAR(tty)) {
 		start_tty(tty);
+		process_echoes(tty);
+	}
 
 	if (tty->closing) {
 		if (I_IXON(tty)) {
-			if (c == START_CHAR(tty))
+			if (c == START_CHAR(tty)) {
 				start_tty(tty);
-			else if (c == STOP_CHAR(tty))
+				process_echoes(tty);
+			} else if (c == STOP_CHAR(tty))
 				stop_tty(tty);
 		}
 		return;
@@ -745,19 +1144,23 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
 	 * up.
 	 */
 	if (!test_bit(c, tty->process_char_map) || tty->lnext) {
-		finish_erasing(tty);
 		tty->lnext = 0;
+		parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
+		if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk - 1)) {
+			/* beep if no space */
+			if (L_ECHO(tty))
+				process_output('\a', tty);
+			return;
+		}
 		if (L_ECHO(tty)) {
-			if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
-				tty_put_char(tty, '\a'); /* beep if no space */
-				return;
-			}
+			finish_erasing(tty);
 			/* Record the column of first canon char. */
 			if (tty->canon_head == tty->read_head)
-				tty->canon_column = tty->column;
+				echo_set_canon_col(tty);
 			echo_char(c, tty);
+			process_echoes(tty);
 		}
-		if (I_PARMRK(tty) && c == (unsigned char) '\377')
+		if (parmrk)
 			put_tty_queue(c, tty);
 		put_tty_queue(c, tty);
 		return;
@@ -766,6 +1169,7 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
 	if (I_IXON(tty)) {
 		if (c == START_CHAR(tty)) {
 			start_tty(tty);
+			process_echoes(tty);
 			return;
 		}
 		if (c == STOP_CHAR(tty)) {
@@ -786,7 +1190,6 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
 		if (c == SUSP_CHAR(tty)) {
 send_signal:
 			/*
-			 * Echo character, and then send the signal.
 			 * Note that we do not use isig() here because we want
 			 * the order to be:
 			 * 1) flush, 2) echo, 3) signal
@@ -795,8 +1198,12 @@ send_signal:
 				n_tty_flush_buffer(tty);
 				tty_driver_flush_buffer(tty);
 			}
-			if (L_ECHO(tty))
+			if (I_IXON(tty))
+				start_tty(tty);
+			if (L_ECHO(tty)) {
 				echo_char(c, tty);
+				process_echoes(tty);
+			}
 			if (tty->pgrp)
 				kill_pgrp(tty->pgrp, signal, 1);
 			return;
@@ -815,6 +1222,7 @@ send_signal:
 		if (c == ERASE_CHAR(tty) || c == KILL_CHAR(tty) ||
 		    (c == WERASE_CHAR(tty) && L_IEXTEN(tty))) {
 			eraser(c, tty);
+			process_echoes(tty);
 			return;
 		}
 		if (c == LNEXT_CHAR(tty) && L_IEXTEN(tty)) {
@@ -822,8 +1230,9 @@ send_signal:
 			if (L_ECHO(tty)) {
 				finish_erasing(tty);
 				if (L_ECHOCTL(tty)) {
-					tty_put_char(tty, '^');
-					tty_put_char(tty, '\b');
+					echo_char_raw('^', tty);
+					echo_char_raw('\b', tty);
+					process_echoes(tty);
 				}
 			}
 			return;
@@ -834,22 +1243,29 @@ send_signal:
 
 			finish_erasing(tty);
 			echo_char(c, tty);
-			opost('\n', tty);
+			echo_char_raw('\n', tty);
 			while (tail != tty->read_head) {
 				echo_char(tty->read_buf[tail], tty);
 				tail = (tail+1) & (N_TTY_BUF_SIZE-1);
 			}
+			process_echoes(tty);
 			return;
 		}
 		if (c == '\n') {
+			if (tty->read_cnt >= N_TTY_BUF_SIZE) {
+				if (L_ECHO(tty))
+					process_output('\a', tty);
+				return;
+			}
 			if (L_ECHO(tty) || L_ECHONL(tty)) {
-				if (tty->read_cnt >= N_TTY_BUF_SIZE-1)
-					tty_put_char(tty, '\a');
-				opost('\n', tty);
+				echo_char_raw('\n', tty);
+				process_echoes(tty);
 			}
 			goto handle_newline;
 		}
 		if (c == EOF_CHAR(tty)) {
+			if (tty->read_cnt >= N_TTY_BUF_SIZE)
+				return;
 			if (tty->canon_head != tty->read_head)
 				set_bit(TTY_PUSH, &tty->flags);
 			c = __DISABLED_CHAR;
@@ -857,22 +1273,28 @@ send_signal:
 		}
 		if ((c == EOL_CHAR(tty)) ||
 		    (c == EOL2_CHAR(tty) && L_IEXTEN(tty))) {
+			parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty))
+				 ? 1 : 0;
+			if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk)) {
+				if (L_ECHO(tty))
+					process_output('\a', tty);
+				return;
+			}
 			/*
 			 * XXX are EOL_CHAR and EOL2_CHAR echoed?!?
 			 */
 			if (L_ECHO(tty)) {
-				if (tty->read_cnt >= N_TTY_BUF_SIZE-1)
-					tty_put_char(tty, '\a');
 				/* Record the column of first canon char. */
 				if (tty->canon_head == tty->read_head)
-					tty->canon_column = tty->column;
+					echo_set_canon_col(tty);
 				echo_char(c, tty);
+				process_echoes(tty);
 			}
 			/*
 			 * XXX does PARMRK doubling happen for
 			 * EOL_CHAR and EOL2_CHAR?
 			 */
-			if (I_PARMRK(tty) && c == (unsigned char) '\377')
+			if (parmrk)
 				put_tty_queue(c, tty);
 
 handle_newline:
@@ -889,23 +1311,27 @@ handle_newline:
 		}
 	}
 
-	finish_erasing(tty);
+	parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
+	if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk - 1)) {
+		/* beep if no space */
+		if (L_ECHO(tty))
+			process_output('\a', tty);
+		return;
+	}
 	if (L_ECHO(tty)) {
-		if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
-			tty_put_char(tty, '\a'); /* beep if no space */
-			return;
-		}
+		finish_erasing(tty);
 		if (c == '\n')
-			opost('\n', tty);
+			echo_char_raw('\n', tty);
 		else {
 			/* Record the column of first canon char. */
 			if (tty->canon_head == tty->read_head)
-				tty->canon_column = tty->column;
+				echo_set_canon_col(tty);
 			echo_char(c, tty);
 		}
+		process_echoes(tty);
 	}
 
-	if (I_PARMRK(tty) && c == (unsigned char) '\377')
+	if (parmrk)
 		put_tty_queue(c, tty);
 
 	put_tty_queue(c, tty);
@@ -923,10 +1349,11 @@ handle_newline:
 
 static void n_tty_write_wakeup(struct tty_struct *tty)
 {
-	if (tty->fasync) {
-		set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+	/* Write out any echoed characters that are still pending */
+	process_echoes(tty);
+
+	if (tty->fasync && test_and_clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags))
 		kill_fasync(&tty->fasync, SIGIO, POLL_OUT);
-	}
 }
 
 /**
@@ -1134,6 +1561,10 @@ static void n_tty_close(struct tty_struct *tty)
 		free_buf(tty->read_buf);
 		tty->read_buf = NULL;
 	}
+	if (tty->echo_buf) {
+		free_buf(tty->echo_buf);
+		tty->echo_buf = NULL;
+	}
 }
 
 /**
@@ -1151,13 +1582,19 @@ static int n_tty_open(struct tty_struct *tty)
 	if (!tty)
 		return -EINVAL;
 
-	/* This one is ugly. Currently a malloc failure here can panic */
+	/* These are ugly. Currently a malloc failure here can panic */
 	if (!tty->read_buf) {
 		tty->read_buf = alloc_buf();
 		if (!tty->read_buf)
 			return -ENOMEM;
 	}
+	if (!tty->echo_buf) {
+		tty->echo_buf = alloc_buf();
+		if (!tty->echo_buf)
+			return -ENOMEM;
+	}
 	memset(tty->read_buf, 0, N_TTY_BUF_SIZE);
+	memset(tty->echo_buf, 0, N_TTY_BUF_SIZE);
 	reset_buffer_flags(tty);
 	tty->column = 0;
 	n_tty_set_termios(tty, NULL);
@@ -1487,16 +1924,23 @@ do_it_again:
  *	@buf: userspace buffer pointer
  *	@nr: size of I/O
  *
- *	Write function of the terminal device. This is serialized with
+ *	Write function of the terminal device.  This is serialized with
  *	respect to other write callers but not to termios changes, reads
- *	and other such events. We must be careful with N_TTY as the receive
- *	code will echo characters, thus calling driver write methods.
+ *	and other such events.  Since the receive code will echo characters,
+ *	thus calling driver write methods, the output_lock is used in
+ *	the output processing functions called here as well as in the
+ *	echo processing function to protect the column state and space
+ *	left in the buffer.
  *
  *	This code must be sure never to sleep through a hangup.
+ *
+ *	Locking: output_lock to protect column state and space left
+ *		 (note that the process_output*() functions take this
+ *		  lock themselves)
  */
 
 static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
-			  const unsigned char *buf, size_t nr)
+			   const unsigned char *buf, size_t nr)
 {
 	const unsigned char *b = buf;
 	DECLARE_WAITQUEUE(wait, current);
@@ -1510,6 +1954,9 @@ static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
 			return retval;
 	}
 
+	/* Write out any echoed characters that are still pending */
+	process_echoes(tty);
+
 	add_wait_queue(&tty->write_wait, &wait);
 	while (1) {
 		set_current_state(TASK_INTERRUPTIBLE);
@@ -1523,7 +1970,7 @@ static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
 		}
 		if (O_OPOST(tty) && !(test_bit(TTY_HW_COOK_OUT, &tty->flags))) {
 			while (nr > 0) {
-				ssize_t num = opost_block(tty, b, nr);
+				ssize_t num = process_output_block(tty, b, nr);
 				if (num < 0) {
 					if (num == -EAGAIN)
 						break;
@@ -1535,7 +1982,7 @@ static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
 				if (nr == 0)
 					break;
 				c = *b;
-				if (opost(c, tty) < 0)
+				if (process_output(c, tty) < 0)
 					break;
 				b++; nr--;
 			}
@@ -1565,6 +2012,8 @@ static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
 break_out:
 	__set_current_state(TASK_RUNNING);
 	remove_wait_queue(&tty->write_wait, &wait);
+	if (b - buf != nr && tty->fasync)
+		set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
 	return (b - buf) ? b - buf : retval;
 }
 
@@ -1663,4 +2112,3 @@ struct tty_ldisc_ops tty_ldisc_N_TTY = {
 	.receive_buf     = n_tty_receive_buf,
 	.write_wakeup    = n_tty_write_wakeup
 };
-
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 9a34a1935283..d6102b644b55 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -353,6 +353,7 @@ struct ctrl_ul {
 
 /* This holds all information that is needed regarding a port */
 struct port {
+	struct tty_port port;
 	u8 update_flow_control;
 	struct ctrl_ul ctrl_ul;
 	struct ctrl_dl ctrl_dl;
@@ -365,8 +366,6 @@ struct port {
 	u8 toggle_ul;
 	u16 token_dl;
 
-	struct tty_struct *tty;
-	int tty_open_count;
 	/* mutex to ensure one access patch to this port */
 	struct mutex tty_sem;
 	wait_queue_head_t tty_wait;
@@ -788,14 +787,14 @@ static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
  * Return 1 - send buffer to card and ack.
  * Return 0 - don't ack, don't send buffer to card.
  */
-static int send_data(enum port_type index, const struct nozomi *dc)
+static int send_data(enum port_type index, struct nozomi *dc)
 {
 	u32 size = 0;
-	const struct port *port = &dc->port[index];
+	struct port *port = &dc->port[index];
 	const u8 toggle = port->toggle_ul;
 	void __iomem *addr = port->ul_addr[toggle];
 	const u32 ul_size = port->ul_size[toggle];
-	struct tty_struct *tty = port->tty;
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
 
 	/* Get data from tty and place in buf for now */
 	size = __kfifo_get(port->fifo_ul, dc->send_buf,
@@ -803,6 +802,7 @@ static int send_data(enum port_type index, const struct nozomi *dc)
 
 	if (size == 0) {
 		DBG4("No more data to send, disable link:");
+		tty_kref_put(tty);
 		return 0;
 	}
 
@@ -815,6 +815,7 @@ static int send_data(enum port_type index, const struct nozomi *dc)
 	if (tty)
 		tty_wakeup(tty);
 
+	tty_kref_put(tty);
 	return 1;
 }
 
@@ -826,7 +827,7 @@ static int receive_data(enum port_type index, struct nozomi *dc)
 	u32 offset = 4;
 	struct port *port = &dc->port[index];
 	void __iomem *addr = port->dl_addr[port->toggle_dl];
-	struct tty_struct *tty = port->tty;
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
 	int i;
 
 	if (unlikely(!tty)) {
@@ -870,7 +871,7 @@ static int receive_data(enum port_type index, struct nozomi *dc)
 	}
 
 	set_bit(index, &dc->flip);
-
+	tty_kref_put(tty);
 	return 1;
 }
 
@@ -1276,9 +1277,15 @@ static irqreturn_t interrupt_handler(int irq, void *dev_id)
 
 exit_handler:
 	spin_unlock(&dc->spin_mutex);
-	for (a = 0; a < NOZOMI_MAX_PORTS; a++)
-		if (test_and_clear_bit(a, &dc->flip))
-			tty_flip_buffer_push(dc->port[a].tty);
+	for (a = 0; a < NOZOMI_MAX_PORTS; a++) {
+		struct tty_struct *tty;
+		if (test_and_clear_bit(a, &dc->flip)) {
+			tty = tty_port_tty_get(&dc->port[a].port);
+			if (tty)
+				tty_flip_buffer_push(tty);
+			tty_kref_put(tty);
+		}
+	}
 	return IRQ_HANDLED;
 none:
 	spin_unlock(&dc->spin_mutex);
@@ -1453,12 +1460,10 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
 
 	for (i = 0; i < MAX_PORT; i++) {
 		mutex_init(&dc->port[i].tty_sem);
-		dc->port[i].tty_open_count = 0;
-		dc->port[i].tty = NULL;
+		tty_port_init(&dc->port[i].port);
 		tty_register_device(ntty_driver, dc->index_start + i,
 							&pdev->dev);
 	}
-
 	return 0;
 
 err_free_sbuf:
@@ -1482,14 +1487,16 @@ static void __devexit tty_exit(struct nozomi *dc)
 
 	flush_scheduled_work();
 
-	for (i = 0; i < MAX_PORT; ++i)
-		if (dc->port[i].tty && \
-				list_empty(&dc->port[i].tty->hangup_work.entry))
-			tty_hangup(dc->port[i].tty);
-
+	for (i = 0; i < MAX_PORT; ++i) {
+		struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
+		if (tty && list_empty(&tty->hangup_work.entry))
+			tty_hangup(tty);
+		tty_kref_put(tty);
+	}
+	/* Racy below - surely should wait for scheduled work to be done or
+	   complete off a hangup method ? */
 	while (dc->open_ttys)
 		msleep(1);
-
 	for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
 		tty_unregister_device(ntty_driver, i);
 }
@@ -1579,23 +1586,22 @@ static int ntty_open(struct tty_struct *tty, struct file *file)
 	if (mutex_lock_interruptible(&port->tty_sem))
 		return -ERESTARTSYS;
 
-	port->tty_open_count++;
+	port->port.count++;
 	dc->open_ttys++;
 
 	/* Enable interrupt downlink for channel */
-	if (port->tty_open_count == 1) {
+	if (port->port.count == 1) {
+		/* FIXME: is this needed now ? */
 		tty->low_latency = 1;
 		tty->driver_data = port;
-		port->tty = tty;
+		tty_port_tty_set(&port->port, tty);
 		DBG1("open: %d", port->token_dl);
 		spin_lock_irqsave(&dc->spin_mutex, flags);
 		dc->last_ier = dc->last_ier | port->token_dl;
 		writew(dc->last_ier, dc->reg_ier);
 		spin_unlock_irqrestore(&dc->spin_mutex, flags);
 	}
-
 	mutex_unlock(&port->tty_sem);
-
 	return 0;
 }
 
@@ -1606,31 +1612,30 @@ static int ntty_open(struct tty_struct *tty, struct file *file)
 static void ntty_close(struct tty_struct *tty, struct file *file)
 {
 	struct nozomi *dc = get_dc_by_tty(tty);
-	struct port *port = tty->driver_data;
+	struct port *nport = tty->driver_data;
+	struct tty_port *port = &nport->port;
 	unsigned long flags;
 
-	if (!dc || !port)
+	if (!dc || !nport)
 		return;
 
-	if (mutex_lock_interruptible(&port->tty_sem))
-		return;
+	/* Users cannot interrupt a close */
+	mutex_lock(&nport->tty_sem);
 
-	if (!port->tty_open_count)
-		goto exit;
+	WARN_ON(!port->count);
 
 	dc->open_ttys--;
-	port->tty_open_count--;
+	port->count--;
+	tty_port_tty_set(port, NULL);
 
-	if (port->tty_open_count == 0) {
-		DBG1("close: %d", port->token_dl);
+	if (port->count == 0) {
+		DBG1("close: %d", nport->token_dl);
 		spin_lock_irqsave(&dc->spin_mutex, flags);
-		dc->last_ier &= ~(port->token_dl);
+		dc->last_ier &= ~(nport->token_dl);
 		writew(dc->last_ier, dc->reg_ier);
 		spin_unlock_irqrestore(&dc->spin_mutex, flags);
 	}
-
-exit:
-	mutex_unlock(&port->tty_sem);
+	mutex_unlock(&nport->tty_sem);
 }
 
 /*
@@ -1660,7 +1665,7 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
 		return -EAGAIN;
 	}
 
-	if (unlikely(!port->tty_open_count)) {
+	if (unlikely(!port->port.count)) {
 		DBG1(" ");
 		goto exit;
 	}
@@ -1710,7 +1715,7 @@ static int ntty_write_room(struct tty_struct *tty)
 	if (!mutex_trylock(&port->tty_sem))
 		return 0;
 
-	if (!port->tty_open_count)
+	if (!port->port.count)
 		goto exit;
 
 	room = port->fifo_ul->size - __kfifo_len(port->fifo_ul);
@@ -1866,7 +1871,7 @@ static s32 ntty_chars_in_buffer(struct tty_struct *tty)
 		goto exit_in_buffer;
 	}
 
-	if (unlikely(!port->tty_open_count)) {
+	if (unlikely(!port->port.count)) {
 		dev_err(&dc->pdev->dev, "No tty open?\n");
 		rval = -ENODEV;
 		goto exit_in_buffer;
diff --git a/drivers/char/nwflash.c b/drivers/char/nwflash.c
index 006be92ee3f3..8c7df5ba088f 100644
--- a/drivers/char/nwflash.c
+++ b/drivers/char/nwflash.c
@@ -58,8 +58,6 @@ static volatile unsigned char *FLASH_BASE;
 static int gbFlashSize = KFLASH_SIZE;
 static DEFINE_MUTEX(nwflash_mutex);
 
-extern spinlock_t gpio_lock;
-
 static int get_flash_id(void)
 {
 	volatile unsigned int c1, c2;
@@ -616,9 +614,9 @@ static void kick_open(void)
 	 * we want to write a bit pattern XXX1 to Xilinx to enable
 	 * the write gate, which will be open for about the next 2ms.
 	 */
-	spin_lock_irqsave(&gpio_lock, flags);
-	cpld_modify(1, 1);
-	spin_unlock_irqrestore(&gpio_lock, flags);
+	spin_lock_irqsave(&nw_gpio_lock, flags);
+	nw_cpld_modify(CPLD_FLASH_WR_ENABLE, CPLD_FLASH_WR_ENABLE);
+	spin_unlock_irqrestore(&nw_gpio_lock, flags);
 
 	/*
 	 * let the ISA bus to catch on...
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 4d64a02612a4..dc073e167abc 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -138,20 +138,15 @@ struct _input_signal_events {
  */
 
 typedef struct _mgslpc_info {
+	struct tty_port		port;
 	void *if_ptr;	/* General purpose pointer (used by SPPP) */
 	int			magic;
-	int			flags;
-	int			count;		/* count of opens */
 	int			line;
-	unsigned short		close_delay;
-	unsigned short		closing_wait;	/* time to wait before closing */
 
 	struct mgsl_icount	icount;
 
-	struct tty_struct 	*tty;
 	int			timeout;
 	int			x_char;		/* xon/xoff character */
-	int			blocked_open;	/* # of blocked opens */
 	unsigned char		read_status_mask;
 	unsigned char		ignore_status_mask;
 
@@ -170,9 +165,6 @@ typedef struct _mgslpc_info {
 	int            rx_buf_count;   /* total number of rx buffers */
 	int            rx_frame_count; /* number of full rx buffers */
 
-	wait_queue_head_t	open_wait;
-	wait_queue_head_t	close_wait;
-
 	wait_queue_head_t	status_event_wait_q;
 	wait_queue_head_t	event_wait_q;
 	struct timer_list	tx_timer;	/* HDLC transmit timeout timer */
@@ -375,7 +367,7 @@ static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short
 static void rx_start(MGSLPC_INFO *info);
 static void rx_stop(MGSLPC_INFO *info);
 
-static void tx_start(MGSLPC_INFO *info);
+static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty);
 static void tx_stop(MGSLPC_INFO *info);
 static void tx_set_idle(MGSLPC_INFO *info);
 
@@ -389,7 +381,8 @@ static void async_mode(MGSLPC_INFO *info);
 
 static void tx_timeout(unsigned long context);
 
-static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg);
+static int carrier_raised(struct tty_port *port);
+static void raise_dtr_rts(struct tty_port *port);
 
 #if SYNCLINK_GENERIC_HDLC
 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
@@ -410,7 +403,7 @@ static void release_resources(MGSLPC_INFO *info);
 static void mgslpc_add_device(MGSLPC_INFO *info);
 static void mgslpc_remove_device(MGSLPC_INFO *info);
 
-static bool rx_get_frame(MGSLPC_INFO *info);
+static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty);
 static void rx_reset_buffers(MGSLPC_INFO *info);
 static int  rx_alloc_buffers(MGSLPC_INFO *info);
 static void rx_free_buffers(MGSLPC_INFO *info);
@@ -421,7 +414,7 @@ static irqreturn_t mgslpc_isr(int irq, void *dev_id);
  * Bottom half interrupt handlers
  */
 static void bh_handler(struct work_struct *work);
-static void bh_transmit(MGSLPC_INFO *info);
+static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty);
 static void bh_status(MGSLPC_INFO *info);
 
 /*
@@ -432,10 +425,10 @@ static int tiocmset(struct tty_struct *tty, struct file *file,
 		    unsigned int set, unsigned int clear);
 static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount);
 static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params);
-static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params);
+static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params, struct tty_struct *tty);
 static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode);
 static int set_txidle(MGSLPC_INFO *info, int idle_mode);
-static int set_txenable(MGSLPC_INFO *info, int enable);
+static int set_txenable(MGSLPC_INFO *info, int enable, struct tty_struct *tty);
 static int tx_abort(MGSLPC_INFO *info);
 static int set_rxenable(MGSLPC_INFO *info, int enable);
 static int wait_events(MGSLPC_INFO *info, int __user *mask);
@@ -474,7 +467,7 @@ static struct tty_driver *serial_driver;
 /* number of characters left in xmit buffer before we ask for more */
 #define WAKEUP_CHARS 256
 
-static void mgslpc_change_params(MGSLPC_INFO *info);
+static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty);
 static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
 
 /* PCMCIA prototypes */
@@ -517,6 +510,11 @@ static void ldisc_receive_buf(struct tty_struct *tty,
 	}
 }
 
+static const struct tty_port_operations mgslpc_port_ops = {
+	.carrier_raised = carrier_raised,
+	.raise_dtr_rts = raise_dtr_rts
+};
+
 static int mgslpc_probe(struct pcmcia_device *link)
 {
     MGSLPC_INFO *info;
@@ -532,12 +530,12 @@ static int mgslpc_probe(struct pcmcia_device *link)
     }
 
     info->magic = MGSLPC_MAGIC;
+    tty_port_init(&info->port);
+    info->port.ops = &mgslpc_port_ops;
     INIT_WORK(&info->task, bh_handler);
     info->max_frame_size = 4096;
-    info->close_delay = 5*HZ/10;
-    info->closing_wait = 30*HZ;
-    init_waitqueue_head(&info->open_wait);
-    init_waitqueue_head(&info->close_wait);
+    info->port.close_delay = 5*HZ/10;
+    info->port.closing_wait = 30*HZ;
     init_waitqueue_head(&info->status_event_wait_q);
     init_waitqueue_head(&info->event_wait_q);
     spin_lock_init(&info->lock);
@@ -784,7 +782,7 @@ static void tx_release(struct tty_struct *tty)
 
 	spin_lock_irqsave(&info->lock,flags);
 	if (!info->tx_enabled)
-	 	tx_start(info);
+	 	tx_start(info, tty);
 	spin_unlock_irqrestore(&info->lock,flags);
 }
 
@@ -823,6 +821,7 @@ static int bh_action(MGSLPC_INFO *info)
 static void bh_handler(struct work_struct *work)
 {
 	MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task);
+	struct tty_struct *tty;
 	int action;
 
 	if (!info)
@@ -833,6 +832,7 @@ static void bh_handler(struct work_struct *work)
 			__FILE__,__LINE__,info->device_name);
 
 	info->bh_running = true;
+	tty = tty_port_tty_get(&info->port);
 
 	while((action = bh_action(info)) != 0) {
 
@@ -844,10 +844,10 @@ static void bh_handler(struct work_struct *work)
 		switch (action) {
 
 		case BH_RECEIVE:
-			while(rx_get_frame(info));
+			while(rx_get_frame(info, tty));
 			break;
 		case BH_TRANSMIT:
-			bh_transmit(info);
+			bh_transmit(info, tty);
 			break;
 		case BH_STATUS:
 			bh_status(info);
@@ -859,14 +859,14 @@ static void bh_handler(struct work_struct *work)
 		}
 	}
 
+	tty_kref_put(tty);
 	if (debug_level >= DEBUG_LEVEL_BH)
 		printk( "%s(%d):bh_handler(%s) exit\n",
 			__FILE__,__LINE__,info->device_name);
 }
 
-static void bh_transmit(MGSLPC_INFO *info)
+static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty)
 {
-	struct tty_struct *tty = info->tty;
 	if (debug_level >= DEBUG_LEVEL_BH)
 		printk("bh_transmit() entry on %s\n", info->device_name);
 
@@ -945,12 +945,11 @@ static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
 	issue_command(info, CHA, CMD_RXFIFO);
 }
 
-static void rx_ready_async(MGSLPC_INFO *info, int tcd)
+static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty)
 {
 	unsigned char data, status, flag;
 	int fifo_count;
 	int work = 0;
- 	struct tty_struct *tty = info->tty;
  	struct mgsl_icount *icount = &info->icount;
 
 	if (tcd) {
@@ -1013,7 +1012,7 @@ static void rx_ready_async(MGSLPC_INFO *info, int tcd)
 }
 
 
-static void tx_done(MGSLPC_INFO *info)
+static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty)
 {
 	if (!info->tx_active)
 		return;
@@ -1042,7 +1041,7 @@ static void tx_done(MGSLPC_INFO *info)
 	else
 #endif
 	{
-		if (info->tty->stopped || info->tty->hw_stopped) {
+		if (tty->stopped || tty->hw_stopped) {
 			tx_stop(info);
 			return;
 		}
@@ -1050,7 +1049,7 @@ static void tx_done(MGSLPC_INFO *info)
 	}
 }
 
-static void tx_ready(MGSLPC_INFO *info)
+static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty)
 {
 	unsigned char fifo_count = 32;
 	int c;
@@ -1062,7 +1061,7 @@ static void tx_ready(MGSLPC_INFO *info)
 		if (!info->tx_active)
 			return;
 	} else {
-		if (info->tty->stopped || info->tty->hw_stopped) {
+		if (tty->stopped || tty->hw_stopped) {
 			tx_stop(info);
 			return;
 		}
@@ -1099,7 +1098,7 @@ static void tx_ready(MGSLPC_INFO *info)
 	}
 }
 
-static void cts_change(MGSLPC_INFO *info)
+static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty)
 {
 	get_signals(info);
 	if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
@@ -1112,14 +1111,14 @@ static void cts_change(MGSLPC_INFO *info)
 	wake_up_interruptible(&info->status_event_wait_q);
 	wake_up_interruptible(&info->event_wait_q);
 
-	if (info->flags & ASYNC_CTS_FLOW) {
-		if (info->tty->hw_stopped) {
+	if (info->port.flags & ASYNC_CTS_FLOW) {
+		if (tty->hw_stopped) {
 			if (info->serial_signals & SerialSignal_CTS) {
 				if (debug_level >= DEBUG_LEVEL_ISR)
 					printk("CTS tx start...");
-				if (info->tty)
-					info->tty->hw_stopped = 0;
-				tx_start(info);
+				if (tty)
+					tty->hw_stopped = 0;
+				tx_start(info, tty);
 				info->pending_bh |= BH_TRANSMIT;
 				return;
 			}
@@ -1127,8 +1126,8 @@ static void cts_change(MGSLPC_INFO *info)
 			if (!(info->serial_signals & SerialSignal_CTS)) {
 				if (debug_level >= DEBUG_LEVEL_ISR)
 					printk("CTS tx stop...");
-				if (info->tty)
-					info->tty->hw_stopped = 1;
+				if (tty)
+					tty->hw_stopped = 1;
 				tx_stop(info);
 			}
 		}
@@ -1136,7 +1135,7 @@ static void cts_change(MGSLPC_INFO *info)
 	info->pending_bh |= BH_STATUS;
 }
 
-static void dcd_change(MGSLPC_INFO *info)
+static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty)
 {
 	get_signals(info);
 	if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
@@ -1158,17 +1157,17 @@ static void dcd_change(MGSLPC_INFO *info)
 	wake_up_interruptible(&info->status_event_wait_q);
 	wake_up_interruptible(&info->event_wait_q);
 
-	if (info->flags & ASYNC_CHECK_CD) {
+	if (info->port.flags & ASYNC_CHECK_CD) {
 		if (debug_level >= DEBUG_LEVEL_ISR)
 			printk("%s CD now %s...", info->device_name,
 			       (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
 		if (info->serial_signals & SerialSignal_DCD)
-			wake_up_interruptible(&info->open_wait);
+			wake_up_interruptible(&info->port.open_wait);
 		else {
 			if (debug_level >= DEBUG_LEVEL_ISR)
 				printk("doing serial hangup...");
-			if (info->tty)
-				tty_hangup(info->tty);
+			if (tty)
+				tty_hangup(tty);
 		}
 	}
 	info->pending_bh |= BH_STATUS;
@@ -1214,6 +1213,7 @@ static void ri_change(MGSLPC_INFO *info)
 static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 {
 	MGSLPC_INFO *info = dev_id;
+	struct tty_struct *tty;
 	unsigned short isr;
 	unsigned char gis, pis;
 	int count=0;
@@ -1224,6 +1224,8 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 	if (!(info->p_dev->_locked))
 		return IRQ_HANDLED;
 
+	tty = tty_port_tty_get(&info->port);
+
 	spin_lock(&info->lock);
 
 	while ((gis = read_reg(info, CHA + GIS))) {
@@ -1239,9 +1241,9 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 		if (gis & (BIT1 + BIT0)) {
 			isr = read_reg16(info, CHB + ISR);
 			if (isr & IRQ_DCD)
-				dcd_change(info);
+				dcd_change(info, tty);
 			if (isr & IRQ_CTS)
-				cts_change(info);
+				cts_change(info, tty);
 		}
 		if (gis & (BIT3 + BIT2))
 		{
@@ -1258,8 +1260,8 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 			}
 			if (isr & IRQ_BREAK_ON) {
 				info->icount.brk++;
-				if (info->flags & ASYNC_SAK)
-					do_SAK(info->tty);
+				if (info->port.flags & ASYNC_SAK)
+					do_SAK(tty);
 			}
 			if (isr & IRQ_RXTIME) {
 				issue_command(info, CHA, CMD_RXFIFO_READ);
@@ -1268,7 +1270,7 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 				if (info->params.mode == MGSL_MODE_HDLC)
 					rx_ready_hdlc(info, isr & IRQ_RXEOM);
 				else
-					rx_ready_async(info, isr & IRQ_RXEOM);
+					rx_ready_async(info, isr & IRQ_RXEOM, tty);
 			}
 
 			/* transmit IRQs */
@@ -1277,14 +1279,14 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 					info->icount.txabort++;
 				else
 					info->icount.txunder++;
-				tx_done(info);
+				tx_done(info, tty);
 			}
 			else if (isr & IRQ_ALLSENT) {
 				info->icount.txok++;
-				tx_done(info);
+				tx_done(info, tty);
 			}
 			else if (isr & IRQ_TXFIFO)
-				tx_ready(info);
+				tx_ready(info, tty);
 		}
 		if (gis & BIT7) {
 			pis = read_reg(info, CHA + PIS);
@@ -1308,6 +1310,7 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 	}
 
 	spin_unlock(&info->lock);
+	tty_kref_put(tty);
 
 	if (debug_level >= DEBUG_LEVEL_ISR)
 		printk("%s(%d):mgslpc_isr(%d)exit.\n",
@@ -1318,14 +1321,14 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 
 /* Initialize and start device.
  */
-static int startup(MGSLPC_INFO * info)
+static int startup(MGSLPC_INFO * info, struct tty_struct *tty)
 {
 	int retval = 0;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name);
 
-	if (info->flags & ASYNC_INITIALIZED)
+	if (info->port.flags & ASYNC_INITIALIZED)
 		return 0;
 
 	if (!info->tx_buf) {
@@ -1352,30 +1355,30 @@ static int startup(MGSLPC_INFO * info)
 		retval = adapter_test(info);
 
 	if ( retval ) {
-  		if (capable(CAP_SYS_ADMIN) && info->tty)
-			set_bit(TTY_IO_ERROR, &info->tty->flags);
+  		if (capable(CAP_SYS_ADMIN) && tty)
+			set_bit(TTY_IO_ERROR, &tty->flags);
 		release_resources(info);
   		return retval;
   	}
 
 	/* program hardware for current parameters */
-	mgslpc_change_params(info);
+	mgslpc_change_params(info, tty);
 
-	if (info->tty)
-		clear_bit(TTY_IO_ERROR, &info->tty->flags);
+	if (tty)
+		clear_bit(TTY_IO_ERROR, &tty->flags);
 
-	info->flags |= ASYNC_INITIALIZED;
+	info->port.flags |= ASYNC_INITIALIZED;
 
 	return 0;
 }
 
 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
  */
-static void shutdown(MGSLPC_INFO * info)
+static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
 {
 	unsigned long flags;
 
-	if (!(info->flags & ASYNC_INITIALIZED))
+	if (!(info->port.flags & ASYNC_INITIALIZED))
 		return;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1402,7 +1405,7 @@ static void shutdown(MGSLPC_INFO * info)
 	/* TODO:disable interrupts instead of reset to preserve signal states */
 	reset_device(info);
 
- 	if (!info->tty || info->tty->termios->c_cflag & HUPCL) {
+ 	if (!tty || tty->termios->c_cflag & HUPCL) {
  		info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
 		set_signals(info);
 	}
@@ -1411,13 +1414,13 @@ static void shutdown(MGSLPC_INFO * info)
 
 	release_resources(info);
 
-	if (info->tty)
-		set_bit(TTY_IO_ERROR, &info->tty->flags);
+	if (tty)
+		set_bit(TTY_IO_ERROR, &tty->flags);
 
-	info->flags &= ~ASYNC_INITIALIZED;
+	info->port.flags &= ~ASYNC_INITIALIZED;
 }
 
-static void mgslpc_program_hw(MGSLPC_INFO *info)
+static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty)
 {
 	unsigned long flags;
 
@@ -1443,7 +1446,7 @@ static void mgslpc_program_hw(MGSLPC_INFO *info)
 	port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
 	get_signals(info);
 
-	if (info->netcount || info->tty->termios->c_cflag & CREAD)
+	if (info->netcount || (tty && (tty->termios->c_cflag & CREAD)))
 		rx_start(info);
 
 	spin_unlock_irqrestore(&info->lock,flags);
@@ -1451,19 +1454,19 @@ static void mgslpc_program_hw(MGSLPC_INFO *info)
 
 /* Reconfigure adapter based on new parameters
  */
-static void mgslpc_change_params(MGSLPC_INFO *info)
+static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
 {
 	unsigned cflag;
 	int bits_per_char;
 
-	if (!info->tty || !info->tty->termios)
+	if (!tty || !tty->termios)
 		return;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgslpc_change_params(%s)\n",
 			 __FILE__,__LINE__, info->device_name );
 
-	cflag = info->tty->termios->c_cflag;
+	cflag = tty->termios->c_cflag;
 
 	/* if B0 rate (hangup) specified then negate DTR and RTS */
 	/* otherwise assert DTR and RTS */
@@ -1510,7 +1513,7 @@ static void mgslpc_change_params(MGSLPC_INFO *info)
 	 * current data rate.
 	 */
 	if (info->params.data_rate <= 460800) {
-		info->params.data_rate = tty_get_baud_rate(info->tty);
+		info->params.data_rate = tty_get_baud_rate(tty);
 	}
 
 	if ( info->params.data_rate ) {
@@ -1520,24 +1523,24 @@ static void mgslpc_change_params(MGSLPC_INFO *info)
 	info->timeout += HZ/50;		/* Add .02 seconds of slop */
 
 	if (cflag & CRTSCTS)
-		info->flags |= ASYNC_CTS_FLOW;
+		info->port.flags |= ASYNC_CTS_FLOW;
 	else
-		info->flags &= ~ASYNC_CTS_FLOW;
+		info->port.flags &= ~ASYNC_CTS_FLOW;
 
 	if (cflag & CLOCAL)
-		info->flags &= ~ASYNC_CHECK_CD;
+		info->port.flags &= ~ASYNC_CHECK_CD;
 	else
-		info->flags |= ASYNC_CHECK_CD;
+		info->port.flags |= ASYNC_CHECK_CD;
 
 	/* process tty input control flags */
 
 	info->read_status_mask = 0;
-	if (I_INPCK(info->tty))
+	if (I_INPCK(tty))
 		info->read_status_mask |= BIT7 | BIT6;
-	if (I_IGNPAR(info->tty))
+	if (I_IGNPAR(tty))
 		info->ignore_status_mask |= BIT7 | BIT6;
 
-	mgslpc_program_hw(info);
+	mgslpc_program_hw(info, tty);
 }
 
 /* Add a character to the transmit buffer
@@ -1597,7 +1600,7 @@ static void mgslpc_flush_chars(struct tty_struct *tty)
 
 	spin_lock_irqsave(&info->lock,flags);
 	if (!info->tx_active)
-	 	tx_start(info);
+	 	tx_start(info, tty);
 	spin_unlock_irqrestore(&info->lock,flags);
 }
 
@@ -1659,7 +1662,7 @@ start:
  	if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
 		spin_lock_irqsave(&info->lock,flags);
 		if (!info->tx_active)
-		 	tx_start(info);
+		 	tx_start(info, tty);
 		spin_unlock_irqrestore(&info->lock,flags);
  	}
 cleanup:
@@ -1764,7 +1767,7 @@ static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
 	if (ch) {
 		spin_lock_irqsave(&info->lock,flags);
 		if (!info->tx_enabled)
-		 	tx_start(info);
+		 	tx_start(info, tty);
 		spin_unlock_irqrestore(&info->lock,flags);
 	}
 }
@@ -1862,7 +1865,7 @@ static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
  *
  * Returns:	0 if success, otherwise error code
  */
-static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params)
+static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty)
 {
  	unsigned long flags;
 	MGSL_PARAMS tmp_params;
@@ -1883,7 +1886,7 @@ static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params)
 	memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
 	spin_unlock_irqrestore(&info->lock,flags);
 
- 	mgslpc_change_params(info);
+ 	mgslpc_change_params(info, tty);
 
 	return 0;
 }
@@ -1944,7 +1947,7 @@ static int set_interface(MGSLPC_INFO * info, int if_mode)
 	return 0;
 }
 
-static int set_txenable(MGSLPC_INFO * info, int enable)
+static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty)
 {
  	unsigned long flags;
 
@@ -1954,7 +1957,7 @@ static int set_txenable(MGSLPC_INFO * info, int enable)
 	spin_lock_irqsave(&info->lock,flags);
 	if (enable) {
 		if (!info->tx_enabled)
-			tx_start(info);
+			tx_start(info, tty);
 	} else {
 		if (info->tx_enabled)
 			tx_stop(info);
@@ -2263,6 +2266,11 @@ static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
 			unsigned int cmd, unsigned long arg)
 {
 	MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+	int error;
+	struct mgsl_icount cnow;	/* kernel counter temps */
+	struct serial_icounter_struct __user *p_cuser;	/* user space */
+	void __user *argp = (void __user *)arg;
+	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
@@ -2277,22 +2285,11 @@ static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
 		    return -EIO;
 	}
 
-	return ioctl_common(info, cmd, arg);
-}
-
-static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg)
-{
-	int error;
-	struct mgsl_icount cnow;	/* kernel counter temps */
-	struct serial_icounter_struct __user *p_cuser;	/* user space */
-	void __user *argp = (void __user *)arg;
-	unsigned long flags;
-
 	switch (cmd) {
 	case MGSL_IOCGPARAMS:
 		return get_params(info, argp);
 	case MGSL_IOCSPARAMS:
-		return set_params(info, argp);
+		return set_params(info, argp, tty);
 	case MGSL_IOCGTXIDLE:
 		return get_txidle(info, argp);
 	case MGSL_IOCSTXIDLE:
@@ -2302,7 +2299,7 @@ static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg)
 	case MGSL_IOCSIF:
 		return set_interface(info,(int)arg);
 	case MGSL_IOCTXENABLE:
-		return set_txenable(info,(int)arg);
+		return set_txenable(info,(int)arg, tty);
 	case MGSL_IOCRXENABLE:
 		return set_rxenable(info,(int)arg);
 	case MGSL_IOCTXABORT:
@@ -2369,7 +2366,7 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term
 		== RELEVANT_IFLAG(old_termios->c_iflag)))
 	  return;
 
-	mgslpc_change_params(info);
+	mgslpc_change_params(info, tty);
 
 	/* Handle transition to B0 status */
 	if (old_termios->c_cflag & CBAUD &&
@@ -2404,81 +2401,34 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term
 static void mgslpc_close(struct tty_struct *tty, struct file * filp)
 {
 	MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+	struct tty_port *port = &info->port;
 
 	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close"))
 		return;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
-			 __FILE__,__LINE__, info->device_name, info->count);
-
-	if (!info->count)
-		return;
+			 __FILE__,__LINE__, info->device_name, port->count);
 
-	if (tty_hung_up_p(filp))
-		goto cleanup;
-
-	if ((tty->count == 1) && (info->count != 1)) {
-		/*
-		 * tty->count is 1 and the tty structure will be freed.
-		 * info->count should be one in this case.
-		 * if it's not, correct it so that the port is shutdown.
-		 */
-		printk("mgslpc_close: bad refcount; tty->count is 1, "
-		       "info->count is %d\n", info->count);
-		info->count = 1;
-	}
+	WARN_ON(!port->count);
 
-	info->count--;
-
-	/* if at least one open remaining, leave hardware active */
-	if (info->count)
+	if (tty_port_close_start(port, tty, filp) == 0)
 		goto cleanup;
 
-	info->flags |= ASYNC_CLOSING;
-
-	/* set tty->closing to notify line discipline to
-	 * only process XON/XOFF characters. Only the N_TTY
-	 * discipline appears to use this (ppp does not).
-	 */
-	tty->closing = 1;
-
-	/* wait for transmit data to clear all layers */
-
-	if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
-		if (debug_level >= DEBUG_LEVEL_INFO)
-			printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
-				 __FILE__,__LINE__, info->device_name );
-		tty_wait_until_sent(tty, info->closing_wait);
-	}
-
- 	if (info->flags & ASYNC_INITIALIZED)
+ 	if (port->flags & ASYNC_INITIALIZED)
  		mgslpc_wait_until_sent(tty, info->timeout);
 
 	mgslpc_flush_buffer(tty);
 
 	tty_ldisc_flush(tty);
-
-	shutdown(info);
-
-	tty->closing = 0;
-	info->tty = NULL;
-
-	if (info->blocked_open) {
-		if (info->close_delay) {
-			msleep_interruptible(jiffies_to_msecs(info->close_delay));
-		}
-		wake_up_interruptible(&info->open_wait);
-	}
-
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-
-	wake_up_interruptible(&info->close_wait);
-
+	shutdown(info, tty);
+	
+	tty_port_close_end(port, tty);
+	tty_port_tty_set(port, NULL);
 cleanup:
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__,
-			tty->driver->name, info->count);
+			tty->driver->name, port->count);
 }
 
 /* Wait until the transmitter is empty.
@@ -2498,7 +2448,7 @@ static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
 	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
 		return;
 
-	if (!(info->flags & ASYNC_INITIALIZED))
+	if (!(info->port.flags & ASYNC_INITIALIZED))
 		goto exit;
 
 	orig_jiffies = jiffies;
@@ -2559,120 +2509,40 @@ static void mgslpc_hangup(struct tty_struct *tty)
 		return;
 
 	mgslpc_flush_buffer(tty);
-	shutdown(info);
-
-	info->count = 0;
-	info->flags &= ~ASYNC_NORMAL_ACTIVE;
-	info->tty = NULL;
-
-	wake_up_interruptible(&info->open_wait);
+	shutdown(info, tty);
+	tty_port_hangup(&info->port);
 }
 
-/* Block the current process until the specified port
- * is ready to be opened.
- */
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
-			   MGSLPC_INFO *info)
+static int carrier_raised(struct tty_port *port)
 {
-	DECLARE_WAITQUEUE(wait, current);
-	int		retval;
-	bool		do_clocal = false;
-	bool		extra_count = false;
-	unsigned long	flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):block_til_ready on %s\n",
-			 __FILE__,__LINE__, tty->driver->name );
-
-	if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
-		/* nonblock mode is set or port is not enabled */
-		/* just verify that callout device is not active */
-		info->flags |= ASYNC_NORMAL_ACTIVE;
-		return 0;
-	}
-
-	if (tty->termios->c_cflag & CLOCAL)
-		do_clocal = true;
-
-	/* Wait for carrier detect and the line to become
-	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, info->count is dropped by one, so that
-	 * mgslpc_close() knows when to free things.  We restore it upon
-	 * exit, either normal or abnormal.
-	 */
-
-	retval = 0;
-	add_wait_queue(&info->open_wait, &wait);
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):block_til_ready before block on %s count=%d\n",
-			 __FILE__,__LINE__, tty->driver->name, info->count );
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (!tty_hung_up_p(filp)) {
-		extra_count = true;
-		info->count--;
-	}
-	spin_unlock_irqrestore(&info->lock, flags);
-	info->blocked_open++;
-
-	while (1) {
-		if ((tty->termios->c_cflag & CBAUD)) {
-			spin_lock_irqsave(&info->lock,flags);
-			info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
-		 	set_signals(info);
-			spin_unlock_irqrestore(&info->lock,flags);
-		}
-
-		set_current_state(TASK_INTERRUPTIBLE);
-
-		if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
-			retval = (info->flags & ASYNC_HUP_NOTIFY) ?
-					-EAGAIN : -ERESTARTSYS;
-			break;
-		}
-
-		spin_lock_irqsave(&info->lock,flags);
-	 	get_signals(info);
-		spin_unlock_irqrestore(&info->lock,flags);
-
- 		if (!(info->flags & ASYNC_CLOSING) &&
- 		    (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
- 			break;
-		}
-
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-
-		if (debug_level >= DEBUG_LEVEL_INFO)
-			printk("%s(%d):block_til_ready blocking on %s count=%d\n",
-				 __FILE__,__LINE__, tty->driver->name, info->count );
-
-		schedule();
-	}
-
-	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->open_wait, &wait);
+	MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
+	unsigned long flags;
 
-	if (extra_count)
-		info->count++;
-	info->blocked_open--;
+	spin_lock_irqsave(&info->lock,flags);
+ 	get_signals(info);
+	spin_unlock_irqrestore(&info->lock,flags);
 
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
-			 __FILE__,__LINE__, tty->driver->name, info->count );
+	if (info->serial_signals & SerialSignal_DCD)
+		return 1;
+	return 0;
+}
 
-	if (!retval)
-		info->flags |= ASYNC_NORMAL_ACTIVE;
+static void raise_dtr_rts(struct tty_port *port)
+{
+	MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
+	unsigned long flags;
 
-	return retval;
+	spin_lock_irqsave(&info->lock,flags);
+	info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+	set_signals(info);
+	spin_unlock_irqrestore(&info->lock,flags);
 }
 
+
 static int mgslpc_open(struct tty_struct *tty, struct file * filp)
 {
 	MGSLPC_INFO	*info;
+	struct tty_port *port;
 	int 			retval, line;
 	unsigned long flags;
 
@@ -2691,23 +2561,24 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
 	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open"))
 		return -ENODEV;
 
+	port = &info->port;
 	tty->driver_data = info;
-	info->tty = tty;
+	tty_port_tty_set(port, tty);
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
-			 __FILE__,__LINE__,tty->driver->name, info->count);
+			 __FILE__,__LINE__,tty->driver->name, port->count);
 
 	/* If port is closing, signal caller to try again */
-	if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){
-		if (info->flags & ASYNC_CLOSING)
-			interruptible_sleep_on(&info->close_wait);
-		retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
+	if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){
+		if (port->flags & ASYNC_CLOSING)
+			interruptible_sleep_on(&port->close_wait);
+		retval = ((port->flags & ASYNC_HUP_NOTIFY) ?
 			-EAGAIN : -ERESTARTSYS);
 		goto cleanup;
 	}
 
-	info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+	tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
 	spin_lock_irqsave(&info->netlock, flags);
 	if (info->netcount) {
@@ -2715,17 +2586,19 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
 		spin_unlock_irqrestore(&info->netlock, flags);
 		goto cleanup;
 	}
-	info->count++;
+	spin_lock(&port->lock);
+	port->count++;
+	spin_unlock(&port->lock);
 	spin_unlock_irqrestore(&info->netlock, flags);
 
-	if (info->count == 1) {
+	if (port->count == 1) {
 		/* 1st open on this device, init hardware */
-		retval = startup(info);
+		retval = startup(info, tty);
 		if (retval < 0)
 			goto cleanup;
 	}
 
-	retval = block_til_ready(tty, filp, info);
+	retval = tty_port_block_til_ready(&info->port, tty, filp);
 	if (retval) {
 		if (debug_level >= DEBUG_LEVEL_INFO)
 			printk("%s(%d):block_til_ready(%s) returned %d\n",
@@ -2739,13 +2612,6 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
 	retval = 0;
 
 cleanup:
-	if (retval) {
-		if (tty->count == 1)
-			info->tty = NULL; /* tty layer will release tty struct */
-		if(info->count)
-			info->count--;
-	}
-
 	return retval;
 }
 
@@ -3500,7 +3366,7 @@ static void rx_start(MGSLPC_INFO *info)
 	info->rx_enabled = true;
 }
 
-static void tx_start(MGSLPC_INFO *info)
+static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty)
 {
 	if (debug_level >= DEBUG_LEVEL_ISR)
 		printk("%s(%d):tx_start(%s)\n",
@@ -3524,11 +3390,11 @@ static void tx_start(MGSLPC_INFO *info)
 		if (info->params.mode == MGSL_MODE_ASYNC) {
 			if (!info->tx_active) {
 				info->tx_active = true;
-				tx_ready(info);
+				tx_ready(info, tty);
 			}
 		} else {
 			info->tx_active = true;
-			tx_ready(info);
+			tx_ready(info, tty);
 			mod_timer(&info->tx_timer, jiffies +
 					msecs_to_jiffies(5000));
 		}
@@ -3849,13 +3715,12 @@ static void rx_reset_buffers(MGSLPC_INFO *info)
  *
  * Returns true if frame returned, otherwise false
  */
-static bool rx_get_frame(MGSLPC_INFO *info)
+static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty)
 {
 	unsigned short status;
 	RXBUF *buf;
 	unsigned int framesize = 0;
 	unsigned long flags;
-	struct tty_struct *tty = info->tty;
 	bool return_frame = false;
 
 	if (info->rx_frame_count == 0)
@@ -4075,7 +3940,11 @@ static void tx_timeout(unsigned long context)
 		hdlcdev_tx_done(info);
 	else
 #endif
-		bh_transmit(info);
+	{
+		struct tty_struct *tty = tty_port_tty_get(&info->port);
+		bh_transmit(info, tty);
+		tty_kref_put(tty);
+	}
 }
 
 #if SYNCLINK_GENERIC_HDLC
@@ -4094,11 +3963,12 @@ static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
 			  unsigned short parity)
 {
 	MGSLPC_INFO *info = dev_to_port(dev);
+	struct tty_struct *tty;
 	unsigned char  new_encoding;
 	unsigned short new_crctype;
 
 	/* return error if TTY interface open */
-	if (info->count)
+	if (info->port.count)
 		return -EBUSY;
 
 	switch (encoding)
@@ -4123,8 +3993,11 @@ static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
 	info->params.crc_type = new_crctype;
 
 	/* if network interface up, reprogram hardware */
-	if (info->netcount)
-		mgslpc_program_hw(info);
+	if (info->netcount) {
+		tty = tty_port_tty_get(&info->port);
+		mgslpc_program_hw(info, tty);
+		tty_kref_put(tty);
+	}
 
 	return 0;
 }
@@ -4165,8 +4038,11 @@ static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	/* start hardware transmitter if necessary */
 	spin_lock_irqsave(&info->lock,flags);
-	if (!info->tx_active)
-	 	tx_start(info);
+	if (!info->tx_active) {
+		struct tty_struct *tty = tty_port_tty_get(&info->port);
+	 	tx_start(info, tty);
+	 	tty_kref_put(tty);
+	}
 	spin_unlock_irqrestore(&info->lock,flags);
 
 	return 0;
@@ -4183,6 +4059,7 @@ static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
 static int hdlcdev_open(struct net_device *dev)
 {
 	MGSLPC_INFO *info = dev_to_port(dev);
+	struct tty_struct *tty;
 	int rc;
 	unsigned long flags;
 
@@ -4195,7 +4072,7 @@ static int hdlcdev_open(struct net_device *dev)
 
 	/* arbitrate between network and tty opens */
 	spin_lock_irqsave(&info->netlock, flags);
-	if (info->count != 0 || info->netcount != 0) {
+	if (info->port.count != 0 || info->netcount != 0) {
 		printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
 		spin_unlock_irqrestore(&info->netlock, flags);
 		return -EBUSY;
@@ -4203,17 +4080,19 @@ static int hdlcdev_open(struct net_device *dev)
 	info->netcount=1;
 	spin_unlock_irqrestore(&info->netlock, flags);
 
+	tty = tty_port_tty_get(&info->port);
 	/* claim resources and init adapter */
-	if ((rc = startup(info)) != 0) {
+	if ((rc = startup(info, tty)) != 0) {
+		tty_kref_put(tty);
 		spin_lock_irqsave(&info->netlock, flags);
 		info->netcount=0;
 		spin_unlock_irqrestore(&info->netlock, flags);
 		return rc;
 	}
-
 	/* assert DTR and RTS, apply hardware settings */
 	info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
-	mgslpc_program_hw(info);
+	mgslpc_program_hw(info, tty);
+	tty_kref_put(tty);
 
 	/* enable network layer transmit */
 	dev->trans_start = jiffies;
@@ -4241,6 +4120,7 @@ static int hdlcdev_open(struct net_device *dev)
 static int hdlcdev_close(struct net_device *dev)
 {
 	MGSLPC_INFO *info = dev_to_port(dev);
+	struct tty_struct *tty = tty_port_tty_get(&info->port);
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -4249,8 +4129,8 @@ static int hdlcdev_close(struct net_device *dev)
 	netif_stop_queue(dev);
 
 	/* shutdown adapter and release resources */
-	shutdown(info);
-
+	shutdown(info, tty);
+	tty_kref_put(tty);
 	hdlc_close(dev);
 
 	spin_lock_irqsave(&info->netlock, flags);
@@ -4281,7 +4161,7 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 		printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
 
 	/* return error if TTY interface open */
-	if (info->count)
+	if (info->port.count)
 		return -EBUSY;
 
 	if (cmd != SIOCWANDEV)
@@ -4354,8 +4234,11 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 			info->params.clock_speed = 0;
 
 		/* if network interface up, reprogram hardware */
-		if (info->netcount)
-			mgslpc_program_hw(info);
+		if (info->netcount) {
+			struct tty_struct *tty = tty_port_tty_get(&info->port);
+			mgslpc_program_hw(info, tty);
+			tty_kref_put(tty);
+		}
 		return 0;
 
 	default:
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index 6d4582712b1f..146c97613da0 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -5,8 +5,6 @@
  *
  *  Added support for a Unix98-style ptmx device.
  *    -- C. Scott Ananian <cananian@alumni.princeton.edu>, 14-Jan-1998
- *  Added TTY_DO_WRITE_WAKEUP to enable n_tty to send POLL_OUT to
- *      waiting writers -- Sapan Bhatia <sapan@corewars.org>
  *
  *  When reading this code see also fs/devpts. In particular note that the
  *  driver_data field is used by the devpts side as a binding to the devpts
@@ -34,7 +32,7 @@
 
 /* These are global because they are accessed in tty_io.c */
 #ifdef CONFIG_UNIX98_PTYS
-struct tty_driver *ptm_driver;
+static struct tty_driver *ptm_driver;
 static struct tty_driver *pts_driver;
 #endif
 
@@ -217,7 +215,6 @@ static int pty_open(struct tty_struct *tty, struct file *filp)
 
 	clear_bit(TTY_OTHER_CLOSED, &tty->link->flags);
 	set_bit(TTY_THROTTLED, &tty->flags);
-	set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
 	retval = 0;
 out:
 	return retval;
@@ -230,6 +227,55 @@ static void pty_set_termios(struct tty_struct *tty,
 	tty->termios->c_cflag |= (CS8 | CREAD);
 }
 
+/**
+ *	pty_do_resize		-	resize event
+ *	@tty: tty being resized
+ *	@real_tty: real tty (not the same as tty if using a pty/tty pair)
+ *	@rows: rows (character)
+ *	@cols: cols (character)
+ *
+ *	Update the termios variables and send the neccessary signals to
+ *	peform a terminal resize correctly
+ */
+
+int pty_resize(struct tty_struct *tty,  struct winsize *ws)
+{
+	struct pid *pgrp, *rpgrp;
+	unsigned long flags;
+	struct tty_struct *pty = tty->link;
+
+	/* For a PTY we need to lock the tty side */
+	mutex_lock(&tty->termios_mutex);
+	if (!memcmp(ws, &tty->winsize, sizeof(*ws)))
+		goto done;
+
+	/* Get the PID values and reference them so we can
+	   avoid holding the tty ctrl lock while sending signals.
+	   We need to lock these individually however. */
+
+	spin_lock_irqsave(&tty->ctrl_lock, flags);
+	pgrp = get_pid(tty->pgrp);
+	spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+
+	spin_lock_irqsave(&pty->ctrl_lock, flags);
+	rpgrp = get_pid(pty->pgrp);
+	spin_unlock_irqrestore(&pty->ctrl_lock, flags);
+
+	if (pgrp)
+		kill_pgrp(pgrp, SIGWINCH, 1);
+	if (rpgrp != pgrp && rpgrp)
+		kill_pgrp(rpgrp, SIGWINCH, 1);
+
+	put_pid(pgrp);
+	put_pid(rpgrp);
+
+	tty->winsize = *ws;
+	pty->winsize = *ws;	/* Never used so will go away soon */
+done:
+	mutex_unlock(&tty->termios_mutex);
+	return 0;
+}
+
 static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
 {
 	struct tty_struct *o_tty;
@@ -290,6 +336,7 @@ static const struct tty_operations pty_ops = {
 	.chars_in_buffer = pty_chars_in_buffer,
 	.unthrottle = pty_unthrottle,
 	.set_termios = pty_set_termios,
+	.resize = pty_resize
 };
 
 /* Traditional BSD devices */
@@ -319,6 +366,7 @@ static const struct tty_operations pty_ops_bsd = {
 	.unthrottle = pty_unthrottle,
 	.set_termios = pty_set_termios,
 	.ioctl = pty_bsd_ioctl,
+	.resize = pty_resize
 };
 
 static void __init legacy_pty_init(void)
@@ -561,7 +609,8 @@ static const struct tty_operations ptm_unix98_ops = {
 	.unthrottle = pty_unthrottle,
 	.set_termios = pty_set_termios,
 	.ioctl = pty_unix98_ioctl,
-	.shutdown = pty_unix98_shutdown
+	.shutdown = pty_unix98_shutdown,
+	.resize = pty_resize
 };
 
 static const struct tty_operations pty_unix98_ops = {
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 675076f5fca8..7c13581ca9cd 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -407,7 +407,7 @@ struct entropy_store {
 	/* read-write data: */
 	spinlock_t lock;
 	unsigned add_ptr;
-	int entropy_count;	/* Must at no time exceed ->POOLBITS! */
+	int entropy_count;
 	int input_rotate;
 };
 
@@ -558,24 +558,43 @@ struct timer_rand_state {
 	unsigned dont_count_entropy:1;
 };
 
+#ifndef CONFIG_SPARSE_IRQ
+
 static struct timer_rand_state *irq_timer_state[NR_IRQS];
 
 static struct timer_rand_state *get_timer_rand_state(unsigned int irq)
 {
-	if (irq >= nr_irqs)
-		return NULL;
-
 	return irq_timer_state[irq];
 }
 
-static void set_timer_rand_state(unsigned int irq, struct timer_rand_state *state)
+static void set_timer_rand_state(unsigned int irq,
+				 struct timer_rand_state *state)
 {
-	if (irq >= nr_irqs)
-		return;
-
 	irq_timer_state[irq] = state;
 }
 
+#else
+
+static struct timer_rand_state *get_timer_rand_state(unsigned int irq)
+{
+	struct irq_desc *desc;
+
+	desc = irq_to_desc(irq);
+
+	return desc->timer_rand_state;
+}
+
+static void set_timer_rand_state(unsigned int irq,
+				 struct timer_rand_state *state)
+{
+	struct irq_desc *desc;
+
+	desc = irq_to_desc(irq);
+
+	desc->timer_rand_state = state;
+}
+#endif
+
 static struct timer_rand_state input_timer_state;
 
 /*
@@ -748,11 +767,10 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min,
 {
 	unsigned long flags;
 
-	BUG_ON(r->entropy_count > r->poolinfo->POOLBITS);
-
 	/* Hold lock while accounting */
 	spin_lock_irqsave(&r->lock, flags);
 
+	BUG_ON(r->entropy_count > r->poolinfo->POOLBITS);
 	DEBUG_ENT("trying to extract %d bits from %s\n",
 		  nbytes * 8, r->name);
 
@@ -933,9 +951,6 @@ void rand_initialize_irq(int irq)
 {
 	struct timer_rand_state *state;
 
-	if (irq >= nr_irqs)
-		return;
-
 	state = get_timer_rand_state(irq);
 
 	if (state)
diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c
index a8f68a3f14dd..2e8a6eed34be 100644
--- a/drivers/char/rio/rio_linux.c
+++ b/drivers/char/rio/rio_linux.c
@@ -173,7 +173,7 @@ static void rio_disable_tx_interrupts(void *ptr);
 static void rio_enable_tx_interrupts(void *ptr);
 static void rio_disable_rx_interrupts(void *ptr);
 static void rio_enable_rx_interrupts(void *ptr);
-static int rio_get_CD(void *ptr);
+static int rio_carrier_raised(struct tty_port *port);
 static void rio_shutdown_port(void *ptr);
 static int rio_set_real_termios(void *ptr);
 static void rio_hungup(void *ptr);
@@ -224,7 +224,6 @@ static struct real_driver rio_real_driver = {
 	rio_enable_tx_interrupts,
 	rio_disable_rx_interrupts,
 	rio_enable_rx_interrupts,
-	rio_get_CD,
 	rio_shutdown_port,
 	rio_set_real_termios,
 	rio_chars_in_buffer,
@@ -476,9 +475,9 @@ static void rio_enable_rx_interrupts(void *ptr)
 
 
 /* Jeez. Isn't this simple?  */
-static int rio_get_CD(void *ptr)
+static int rio_carrier_raised(struct tty_port *port)
 {
-	struct Port *PortP = ptr;
+	struct Port *PortP = container_of(port, struct Port, gs.port);
 	int rv;
 
 	func_enter();
@@ -797,16 +796,9 @@ static int rio_init_drivers(void)
 	return 1;
 }
 
-
-static void *ckmalloc(int size)
-{
-	void *p;
-
-	p = kzalloc(size, GFP_KERNEL);
-	return p;
-}
-
-
+static const struct tty_port_operations rio_port_ops = {
+	.carrier_raised = rio_carrier_raised,
+};
 
 static int rio_init_datastructures(void)
 {
@@ -826,33 +818,30 @@ static int rio_init_datastructures(void)
 #define TMIO_SZ sizeof(struct termios *)
 	rio_dprintk(RIO_DEBUG_INIT, "getting : %Zd %Zd %Zd %Zd %Zd bytes\n", RI_SZ, RIO_HOSTS * HOST_SZ, RIO_PORTS * PORT_SZ, RIO_PORTS * TMIO_SZ, RIO_PORTS * TMIO_SZ);
 
-	if (!(p = ckmalloc(RI_SZ)))
+	if (!(p = kzalloc(RI_SZ, GFP_KERNEL)))
 		goto free0;
-	if (!(p->RIOHosts = ckmalloc(RIO_HOSTS * HOST_SZ)))
+	if (!(p->RIOHosts = kzalloc(RIO_HOSTS * HOST_SZ, GFP_KERNEL)))
 		goto free1;
-	if (!(p->RIOPortp = ckmalloc(RIO_PORTS * PORT_SZ)))
+	if (!(p->RIOPortp = kzalloc(RIO_PORTS * PORT_SZ, GFP_KERNEL)))
 		goto free2;
 	p->RIOConf = RIOConf;
 	rio_dprintk(RIO_DEBUG_INIT, "Got : %p %p %p\n", p, p->RIOHosts, p->RIOPortp);
 
 #if 1
 	for (i = 0; i < RIO_PORTS; i++) {
-		port = p->RIOPortp[i] = ckmalloc(sizeof(struct Port));
+		port = p->RIOPortp[i] = kzalloc(sizeof(struct Port), GFP_KERNEL);
 		if (!port) {
 			goto free6;
 		}
 		rio_dprintk(RIO_DEBUG_INIT, "initing port %d (%d)\n", i, port->Mapped);
+		tty_port_init(&port->gs.port);
+		port->gs.port.ops = &rio_port_ops;
 		port->PortNum = i;
 		port->gs.magic = RIO_MAGIC;
 		port->gs.close_delay = HZ / 2;
 		port->gs.closing_wait = 30 * HZ;
 		port->gs.rd = &rio_real_driver;
 		spin_lock_init(&port->portSem);
-		/*
-		 * Initializing wait queue
-		 */
-		init_waitqueue_head(&port->gs.port.open_wait);
-		init_waitqueue_head(&port->gs.port.close_wait);
 	}
 #else
 	/* We could postpone initializing them to when they are configured. */
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index 2c6c8f33d6b4..9af8d74875bc 100644
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -857,98 +857,21 @@ static void rc_shutdown_port(struct tty_struct *tty,
 		rc_shutdown_board(bp);
 }
 
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
-			   struct riscom_port *port)
+static int carrier_raised(struct tty_port *port)
 {
-	DECLARE_WAITQUEUE(wait, current);
-	struct riscom_board *bp = port_Board(port);
-	int    retval;
-	int    do_clocal = 0;
-	int    CD;
+	struct riscom_port *p = container_of(port, struct riscom_port, port);
+	struct riscom_board *bp = port_Board(p);
 	unsigned long flags;
-
-	/*
-	 * If the device is in the middle of being closed, then block
-	 * until it's done, and then try again.
-	 */
-	if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&port->port.close_wait);
-		if (port->port.flags & ASYNC_HUP_NOTIFY)
-			return -EAGAIN;
-		else
-			return -ERESTARTSYS;
-	}
-
-	/*
-	 * If non-blocking mode is set, or the port is not enabled,
-	 * then make the check up front and then exit.
-	 */
-	if ((filp->f_flags & O_NONBLOCK) ||
-	    (tty->flags & (1 << TTY_IO_ERROR))) {
-		port->port.flags |= ASYNC_NORMAL_ACTIVE;
-		return 0;
-	}
-
-	if (C_CLOCAL(tty))
-		do_clocal = 1;
-
-	/*
-	 * Block waiting for the carrier detect and the line to become
-	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, info->count is dropped by one, so that
-	 * rs_close() knows when to free things.  We restore it upon
-	 * exit, either normal or abnormal.
-	 */
-	retval = 0;
-	add_wait_queue(&port->port.open_wait, &wait);
-
+	int CD;
+	
 	spin_lock_irqsave(&riscom_lock, flags);
-
-	if (!tty_hung_up_p(filp))
-		port->port.count--;
-
+	rc_out(bp, CD180_CAR, port_No(p));
+	CD = rc_in(bp, CD180_MSVR) & MSVR_CD;
+	rc_out(bp, CD180_MSVR, MSVR_RTS);
+	bp->DTR &= ~(1u << port_No(p));
+	rc_out(bp, RC_DTR, bp->DTR);
 	spin_unlock_irqrestore(&riscom_lock, flags);
-
-	port->port.blocked_open++;
-	while (1) {
-		spin_lock_irqsave(&riscom_lock, flags);
-
-		rc_out(bp, CD180_CAR, port_No(port));
-		CD = rc_in(bp, CD180_MSVR) & MSVR_CD;
-		rc_out(bp, CD180_MSVR, MSVR_RTS);
-		bp->DTR &= ~(1u << port_No(port));
-		rc_out(bp, RC_DTR, bp->DTR);
-
-		spin_unlock_irqrestore(&riscom_lock, flags);
-
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) ||
-		    !(port->port.flags & ASYNC_INITIALIZED)) {
-			if (port->port.flags & ASYNC_HUP_NOTIFY)
-				retval = -EAGAIN;
-			else
-				retval = -ERESTARTSYS;
-			break;
-		}
-		if (!(port->port.flags & ASYNC_CLOSING) &&
-		    (do_clocal || CD))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-		schedule();
-	}
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&port->port.open_wait, &wait);
-	if (!tty_hung_up_p(filp))
-		port->port.count++;
-	port->port.blocked_open--;
-	if (retval)
-		return retval;
-
-	port->port.flags |= ASYNC_NORMAL_ACTIVE;
-	return 0;
+	return CD;
 }
 
 static int rc_open(struct tty_struct *tty, struct file *filp)
@@ -977,13 +900,13 @@ static int rc_open(struct tty_struct *tty, struct file *filp)
 
 	error = rc_setup_port(bp, port);
 	if (error == 0)
-		error = block_til_ready(tty, filp, port);
+		error = tty_port_block_til_ready(&port->port, tty, filp);
 	return error;
 }
 
 static void rc_flush_buffer(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	unsigned long flags;
 
 	if (rc_paranoia_check(port, tty->name, "rc_flush_buffer"))
@@ -998,7 +921,7 @@ static void rc_flush_buffer(struct tty_struct *tty)
 
 static void rc_close(struct tty_struct *tty, struct file *filp)
 {
-	struct riscom_port *port = (struct riscom_port *) tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp;
 	unsigned long flags;
 	unsigned long timeout;
@@ -1006,40 +929,19 @@ static void rc_close(struct tty_struct *tty, struct file *filp)
 	if (!port || rc_paranoia_check(port, tty->name, "close"))
 		return;
 
-	spin_lock_irqsave(&riscom_lock, flags);
-
-	if (tty_hung_up_p(filp))
-		goto out;
-
 	bp = port_Board(port);
-	if ((tty->count == 1) && (port->port.count != 1))  {
-		printk(KERN_INFO "rc%d: rc_close: bad port count;"
-		       " tty->count is 1, port count is %d\n",
-		       board_No(bp), port->port.count);
-		port->port.count = 1;
-	}
-	if (--port->port.count < 0)  {
-		printk(KERN_INFO "rc%d: rc_close: bad port count "
-				 "for tty%d: %d\n",
-		       board_No(bp), port_No(port), port->port.count);
-		port->port.count = 0;
-	}
-	if (port->port.count)
-		goto out;
-	port->port.flags |= ASYNC_CLOSING;
-	/*
-	 * Now we wait for the transmit buffer to clear; and we notify
-	 * the line discipline to only process XON/XOFF characters.
-	 */
-	tty->closing = 1;
-	if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
-		tty_wait_until_sent(tty, port->port.closing_wait);
+	
+	if (tty_port_close_start(&port->port, tty, filp) == 0)
+		return;
+	
 	/*
 	 * At this point we stop accepting input.  To do this, we
 	 * disable the receive line status interrupts, and tell the
 	 * interrupt driver to stop checking the data ready bit in the
 	 * line status register.
 	 */
+
+	spin_lock_irqsave(&riscom_lock, flags);
 	port->IER &= ~IER_RXD;
 	if (port->port.flags & ASYNC_INITIALIZED) {
 		port->IER &= ~IER_TXRDY;
@@ -1053,33 +955,24 @@ static void rc_close(struct tty_struct *tty, struct file *filp)
 		 */
 		timeout = jiffies + HZ;
 		while (port->IER & IER_TXEMPTY) {
+			spin_unlock_irqrestore(&riscom_lock, flags);
 			msleep_interruptible(jiffies_to_msecs(port->timeout));
+			spin_lock_irqsave(&riscom_lock, flags);
 			if (time_after(jiffies, timeout))
 				break;
 		}
 	}
 	rc_shutdown_port(tty, bp, port);
 	rc_flush_buffer(tty);
-	tty_ldisc_flush(tty);
-
-	tty->closing = 0;
-	port->port.tty = NULL;
-	if (port->port.blocked_open) {
-		if (port->port.close_delay)
-			msleep_interruptible(jiffies_to_msecs(port->port.close_delay));
-		wake_up_interruptible(&port->port.open_wait);
-	}
-	port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-	wake_up_interruptible(&port->port.close_wait);
-
-out:
 	spin_unlock_irqrestore(&riscom_lock, flags);
+
+	tty_port_close_end(&port->port, tty);
 }
 
 static int rc_write(struct tty_struct *tty,
 		    const unsigned char *buf, int count)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp;
 	int c, total = 0;
 	unsigned long flags;
@@ -1122,7 +1015,7 @@ static int rc_write(struct tty_struct *tty,
 
 static int rc_put_char(struct tty_struct *tty, unsigned char ch)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	unsigned long flags;
 	int ret = 0;
 
@@ -1146,7 +1039,7 @@ out:
 
 static void rc_flush_chars(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	unsigned long flags;
 
 	if (rc_paranoia_check(port, tty->name, "rc_flush_chars"))
@@ -1166,7 +1059,7 @@ static void rc_flush_chars(struct tty_struct *tty)
 
 static int rc_write_room(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	int	ret;
 
 	if (rc_paranoia_check(port, tty->name, "rc_write_room"))
@@ -1180,7 +1073,7 @@ static int rc_write_room(struct tty_struct *tty)
 
 static int rc_chars_in_buffer(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 
 	if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer"))
 		return 0;
@@ -1190,7 +1083,7 @@ static int rc_chars_in_buffer(struct tty_struct *tty)
 
 static int rc_tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp;
 	unsigned char status;
 	unsigned int result;
@@ -1220,7 +1113,7 @@ static int rc_tiocmget(struct tty_struct *tty, struct file *file)
 static int rc_tiocmset(struct tty_struct *tty, struct file *file,
 		       unsigned int set, unsigned int clear)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	unsigned long flags;
 	struct riscom_board *bp;
 
@@ -1252,7 +1145,7 @@ static int rc_tiocmset(struct tty_struct *tty, struct file *file,
 
 static int rc_send_break(struct tty_struct *tty, int length)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp = port_Board(port);
 	unsigned long flags;
 
@@ -1345,7 +1238,7 @@ static int rc_get_serial_info(struct riscom_port *port,
 static int rc_ioctl(struct tty_struct *tty, struct file *filp,
 		    unsigned int cmd, unsigned long arg)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	void __user *argp = (void __user *)arg;
 	int retval;
 
@@ -1371,7 +1264,7 @@ static int rc_ioctl(struct tty_struct *tty, struct file *filp,
 
 static void rc_throttle(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp;
 	unsigned long flags;
 
@@ -1393,7 +1286,7 @@ static void rc_throttle(struct tty_struct *tty)
 
 static void rc_unthrottle(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp;
 	unsigned long flags;
 
@@ -1415,7 +1308,7 @@ static void rc_unthrottle(struct tty_struct *tty)
 
 static void rc_stop(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp;
 	unsigned long flags;
 
@@ -1433,7 +1326,7 @@ static void rc_stop(struct tty_struct *tty)
 
 static void rc_start(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp;
 	unsigned long flags;
 
@@ -1454,8 +1347,9 @@ static void rc_start(struct tty_struct *tty)
 
 static void rc_hangup(struct tty_struct *tty)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	struct riscom_board *bp;
+	unsigned long flags;
 
 	if (rc_paranoia_check(port, tty->name, "rc_hangup"))
 		return;
@@ -1463,16 +1357,18 @@ static void rc_hangup(struct tty_struct *tty)
 	bp = port_Board(port);
 
 	rc_shutdown_port(tty, bp, port);
+	spin_lock_irqsave(&port->port.lock, flags);
 	port->port.count = 0;
 	port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
 	port->port.tty = NULL;
 	wake_up_interruptible(&port->port.open_wait);
+	spin_unlock_irqrestore(&port->port.lock, flags);
 }
 
 static void rc_set_termios(struct tty_struct *tty,
 					struct ktermios *old_termios)
 {
-	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+	struct riscom_port *port = tty->driver_data;
 	unsigned long flags;
 
 	if (rc_paranoia_check(port, tty->name, "rc_set_termios"))
@@ -1510,6 +1406,11 @@ static const struct tty_operations riscom_ops = {
 	.break_ctl = rc_send_break,
 };
 
+static const struct tty_port_operations riscom_port_ops = {
+	.carrier_raised = carrier_raised,
+};
+
+
 static int __init rc_init_drivers(void)
 {
 	int error;
@@ -1541,6 +1442,7 @@ static int __init rc_init_drivers(void)
 	memset(rc_port, 0, sizeof(rc_port));
 	for (i = 0; i < RC_NPORT * RC_NBOARD; i++)  {
 		tty_port_init(&rc_port[i].port);
+		rc_port[i].port.ops = &riscom_port_ops;
 		rc_port[i].magic = RISCOM8_MAGIC;
 	}
 	return 0;
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index 584d791e84a6..f59fc5cea067 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -135,6 +135,7 @@ static int rcktpt_type[NUM_BOARDS];
 static int is_PCI[NUM_BOARDS];
 static rocketModel_t rocketModel[NUM_BOARDS];
 static int max_board;
+static const struct tty_port_operations rocket_port_ops;
 
 /*
  * The following arrays define the interrupt bits corresponding to each AIOP.
@@ -435,15 +436,15 @@ static void rp_do_transmit(struct r_port *info)
 #endif
 	if (!info)
 		return;
-	if (!info->port.tty) {
-		printk(KERN_WARNING "rp: WARNING %s called with "
-				"info->port.tty==NULL\n", __func__);
+	tty = tty_port_tty_get(&info->port);
+
+	if (tty == NULL) {
+		printk(KERN_WARNING "rp: WARNING %s called with tty==NULL\n", __func__);
 		clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 		return;
 	}
 
 	spin_lock_irqsave(&info->slock, flags);
-	tty = info->port.tty;
 	info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
 
 	/*  Loop sending data to FIFO until done or FIFO full */
@@ -477,6 +478,7 @@ static void rp_do_transmit(struct r_port *info)
 	}
 
 	spin_unlock_irqrestore(&info->slock, flags);
+	tty_kref_put(tty);
 
 #ifdef ROCKET_DEBUG_INTR
 	printk(KERN_DEBUG "(%d,%d,%d,%d)...\n", info->xmit_cnt, info->xmit_head,
@@ -498,18 +500,18 @@ static void rp_handle_port(struct r_port *info)
 	if (!info)
 		return;
 
-	if ((info->flags & ROCKET_INITIALIZED) == 0) {
+	if ((info->port.flags & ASYNC_INITIALIZED) == 0) {
 		printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
 				"info->flags & NOT_INIT\n");
 		return;
 	}
-	if (!info->port.tty) {
+	tty = tty_port_tty_get(&info->port);
+	if (!tty) {
 		printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
-				"info->port.tty==NULL\n");
+				"tty==NULL\n");
 		return;
 	}
 	cp = &info->channel;
-	tty = info->port.tty;
 
 	IntMask = sGetChanIntID(cp) & info->intmask;
 #ifdef ROCKET_DEBUG_INTR
@@ -541,6 +543,7 @@ static void rp_handle_port(struct r_port *info)
 		printk(KERN_INFO "DSR change...\n");
 	}
 #endif
+	tty_kref_put(tty);
 }
 
 /*
@@ -649,9 +652,8 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
 	info->board = board;
 	info->aiop = aiop;
 	info->chan = chan;
-	info->port.closing_wait = 3000;
-	info->port.close_delay = 50;
-	init_waitqueue_head(&info->port.open_wait);
+	tty_port_init(&info->port);
+	info->port.ops = &rocket_port_ops;
 	init_completion(&info->close_wait);
 	info->flags &= ~ROCKET_MODE_MASK;
 	switch (pc104[board][line]) {
@@ -710,7 +712,7 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
  *  Configures a rocketport port according to its termio settings.  Called from 
  *  user mode into the driver (exception handler).  *info CD manipulation is spinlock protected.
  */
-static void configure_r_port(struct r_port *info,
+static void configure_r_port(struct tty_struct *tty, struct r_port *info,
 			     struct ktermios *old_termios)
 {
 	unsigned cflag;
@@ -718,7 +720,7 @@ static void configure_r_port(struct r_port *info,
 	unsigned rocketMode;
 	int bits, baud, divisor;
 	CHANNEL_t *cp;
-	struct ktermios *t = info->port.tty->termios;
+	struct ktermios *t = tty->termios;
 
 	cp = &info->channel;
 	cflag = t->c_cflag;
@@ -751,7 +753,7 @@ static void configure_r_port(struct r_port *info,
 	}
 
 	/* baud rate */
-	baud = tty_get_baud_rate(info->port.tty);
+	baud = tty_get_baud_rate(tty);
 	if (!baud)
 		baud = 9600;
 	divisor = ((rp_baud_base[info->board] + (baud >> 1)) / baud) - 1;
@@ -769,7 +771,7 @@ static void configure_r_port(struct r_port *info,
 	sSetBaud(cp, divisor);
 
 	/* FIXME: Should really back compute a baud rate from the divisor */
-	tty_encode_baud_rate(info->port.tty, baud, baud);
+	tty_encode_baud_rate(tty, baud, baud);
 
 	if (cflag & CRTSCTS) {
 		info->intmask |= DELTA_CTS;
@@ -794,15 +796,15 @@ static void configure_r_port(struct r_port *info,
 	 * Handle software flow control in the board
 	 */
 #ifdef ROCKET_SOFT_FLOW
-	if (I_IXON(info->port.tty)) {
+	if (I_IXON(tty)) {
 		sEnTxSoftFlowCtl(cp);
-		if (I_IXANY(info->port.tty)) {
+		if (I_IXANY(tty)) {
 			sEnIXANY(cp);
 		} else {
 			sDisIXANY(cp);
 		}
-		sSetTxXONChar(cp, START_CHAR(info->port.tty));
-		sSetTxXOFFChar(cp, STOP_CHAR(info->port.tty));
+		sSetTxXONChar(cp, START_CHAR(tty));
+		sSetTxXOFFChar(cp, STOP_CHAR(tty));
 	} else {
 		sDisTxSoftFlowCtl(cp);
 		sDisIXANY(cp);
@@ -814,24 +816,24 @@ static void configure_r_port(struct r_port *info,
 	 * Set up ignore/read mask words
 	 */
 	info->read_status_mask = STMRCVROVRH | 0xFF;
-	if (I_INPCK(info->port.tty))
+	if (I_INPCK(tty))
 		info->read_status_mask |= STMFRAMEH | STMPARITYH;
-	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
+	if (I_BRKINT(tty) || I_PARMRK(tty))
 		info->read_status_mask |= STMBREAKH;
 
 	/*
 	 * Characters to ignore
 	 */
 	info->ignore_status_mask = 0;
-	if (I_IGNPAR(info->port.tty))
+	if (I_IGNPAR(tty))
 		info->ignore_status_mask |= STMFRAMEH | STMPARITYH;
-	if (I_IGNBRK(info->port.tty)) {
+	if (I_IGNBRK(tty)) {
 		info->ignore_status_mask |= STMBREAKH;
 		/*
 		 * If we're ignoring parity and break indicators,
 		 * ignore overruns too.  (For real raw support).
 		 */
-		if (I_IGNPAR(info->port.tty))
+		if (I_IGNPAR(tty))
 			info->ignore_status_mask |= STMRCVROVRH;
 	}
 
@@ -864,106 +866,17 @@ static void configure_r_port(struct r_port *info,
 	}
 }
 
-/*  info->port.count is considered critical, protected by spinlocks.  */
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
-			   struct r_port *info)
+static int carrier_raised(struct tty_port *port)
 {
-	DECLARE_WAITQUEUE(wait, current);
-	int retval;
-	int do_clocal = 0, extra_count = 0;
-	unsigned long flags;
-
-	/*
-	 * If the device is in the middle of being closed, then block
-	 * until it's done, and then try again.
-	 */
-	if (tty_hung_up_p(filp))
-		return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
-	if (info->flags & ROCKET_CLOSING) {
-		if (wait_for_completion_interruptible(&info->close_wait))
-			return -ERESTARTSYS;
-		return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
-	}
-
-	/*
-	 * If non-blocking mode is set, or the port is not enabled,
-	 * then make the check up front and then exit.
-	 */
-	if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
-		info->flags |= ROCKET_NORMAL_ACTIVE;
-		return 0;
-	}
-	if (tty->termios->c_cflag & CLOCAL)
-		do_clocal = 1;
-
-	/*
-	 * Block waiting for the carrier detect and the line to become free.  While we are in
-	 * this loop, info->port.count is dropped by one, so that rp_close() knows when to free things.
-         * We restore it upon exit, either normal or abnormal.
-	 */
-	retval = 0;
-	add_wait_queue(&info->port.open_wait, &wait);
-#ifdef ROCKET_DEBUG_OPEN
-	printk(KERN_INFO "block_til_ready before block: ttyR%d, count = %d\n", info->line, info->port.count);
-#endif
-	spin_lock_irqsave(&info->slock, flags);
-
-#ifdef ROCKET_DISABLE_SIMUSAGE
-	info->flags |= ROCKET_NORMAL_ACTIVE;
-#else
-	if (!tty_hung_up_p(filp)) {
-		extra_count = 1;
-		info->port.count--;
-	}
-#endif
-	info->port.blocked_open++;
-
-	spin_unlock_irqrestore(&info->slock, flags);
-
-	while (1) {
-		if (tty->termios->c_cflag & CBAUD) {
-			sSetDTR(&info->channel);
-			sSetRTS(&info->channel);
-		}
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) || !(info->flags & ROCKET_INITIALIZED)) {
-			if (info->flags & ROCKET_HUP_NOTIFY)
-				retval = -EAGAIN;
-			else
-				retval = -ERESTARTSYS;
-			break;
-		}
-		if (!(info->flags & ROCKET_CLOSING) && (do_clocal || (sGetChanStatusLo(&info->channel) & CD_ACT)))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-#ifdef ROCKET_DEBUG_OPEN
-		printk(KERN_INFO "block_til_ready blocking: ttyR%d, count = %d, flags=0x%0x\n",
-		     info->line, info->port.count, info->flags);
-#endif
-		schedule();	/*  Don't hold spinlock here, will hang PC */
-	}
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->port.open_wait, &wait);
-
-	spin_lock_irqsave(&info->slock, flags);
-
-	if (extra_count)
-		info->port.count++;
-	info->port.blocked_open--;
-
-	spin_unlock_irqrestore(&info->slock, flags);
+	struct r_port *info = container_of(port, struct r_port, port);
+	return (sGetChanStatusLo(&info->channel) & CD_ACT) ? 1 : 0;
+}
 
-#ifdef ROCKET_DEBUG_OPEN
-	printk(KERN_INFO "block_til_ready after blocking: ttyR%d, count = %d\n",
-	       info->line, info->port.count);
-#endif
-	if (retval)
-		return retval;
-	info->flags |= ROCKET_NORMAL_ACTIVE;
-	return 0;
+static void raise_dtr_rts(struct tty_port *port)
+{
+	struct r_port *info = container_of(port, struct r_port, port);
+	sSetDTR(&info->channel);
+	sSetRTS(&info->channel);
 }
 
 /*
@@ -973,24 +886,26 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 static int rp_open(struct tty_struct *tty, struct file *filp)
 {
 	struct r_port *info;
+	struct tty_port *port;
 	int line = 0, retval;
 	CHANNEL_t *cp;
 	unsigned long page;
 
 	line = tty->index;
-	if ((line < 0) || (line >= MAX_RP_PORTS) || ((info = rp_table[line]) == NULL))
+	if (line < 0 || line >= MAX_RP_PORTS || ((info = rp_table[line]) == NULL))
 		return -ENXIO;
-
+	port = &info->port;
+	
 	page = __get_free_page(GFP_KERNEL);
 	if (!page)
 		return -ENOMEM;
 
-	if (info->flags & ROCKET_CLOSING) {
+	if (port->flags & ASYNC_CLOSING) {
 		retval = wait_for_completion_interruptible(&info->close_wait);
 		free_page(page);
 		if (retval)
 			return retval;
-		return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
+		return ((port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
 	}
 
 	/*
@@ -1002,9 +917,9 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 		info->xmit_buf = (unsigned char *) page;
 
 	tty->driver_data = info;
-	info->port.tty = tty;
+	tty_port_tty_set(port, tty);
 
-	if (info->port.count++ == 0) {
+	if (port->count++ == 0) {
 		atomic_inc(&rp_num_ports_open);
 
 #ifdef ROCKET_DEBUG_OPEN
@@ -1019,7 +934,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 	/*
 	 * Info->count is now 1; so it's safe to sleep now.
 	 */
-	if ((info->flags & ROCKET_INITIALIZED) == 0) {
+	if (!test_bit(ASYNC_INITIALIZED, &port->flags)) {
 		cp = &info->channel;
 		sSetRxTrigger(cp, TRIG_1);
 		if (sGetChanStatus(cp) & CD_ACT)
@@ -1043,21 +958,21 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 		sEnRxFIFO(cp);
 		sEnTransmit(cp);
 
-		info->flags |= ROCKET_INITIALIZED;
+		set_bit(ASYNC_INITIALIZED, &info->port.flags);
 
 		/*
 		 * Set up the tty->alt_speed kludge
 		 */
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
-			info->port.tty->alt_speed = 57600;
+			tty->alt_speed = 57600;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
-			info->port.tty->alt_speed = 115200;
+			tty->alt_speed = 115200;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
-			info->port.tty->alt_speed = 230400;
+			tty->alt_speed = 230400;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
-			info->port.tty->alt_speed = 460800;
+			tty->alt_speed = 460800;
 
-		configure_r_port(info, NULL);
+		configure_r_port(tty, info, NULL);
 		if (tty->termios->c_cflag & CBAUD) {
 			sSetDTR(cp);
 			sSetRTS(cp);
@@ -1066,7 +981,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 	/*  Starts (or resets) the maint polling loop */
 	mod_timer(&rocket_timer, jiffies + POLL_PERIOD);
 
-	retval = block_til_ready(tty, filp, info);
+	retval = tty_port_block_til_ready(port, tty, filp);
 	if (retval) {
 #ifdef ROCKET_DEBUG_OPEN
 		printk(KERN_INFO "rp_open returning after block_til_ready with %d\n", retval);
@@ -1081,8 +996,8 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
  */
 static void rp_close(struct tty_struct *tty, struct file *filp)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
-	unsigned long flags;
+	struct r_port *info = tty->driver_data;
+	struct tty_port *port = &info->port;
 	int timeout;
 	CHANNEL_t *cp;
 	
@@ -1093,53 +1008,10 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 	printk(KERN_INFO "rp_close ttyR%d, count = %d\n", info->line, info->port.count);
 #endif
 
-	if (tty_hung_up_p(filp))
-		return;
-	spin_lock_irqsave(&info->slock, flags);
-
-	if ((tty->count == 1) && (info->port.count != 1)) {
-		/*
-		 * Uh, oh.  tty->count is 1, which means that the tty
-		 * structure will be freed.  Info->count should always
-		 * be one in these conditions.  If it's greater than
-		 * one, we've got real problems, since it means the
-		 * serial port won't be shutdown.
-		 */
-		printk(KERN_WARNING "rp_close: bad serial port count; "
-			"tty->count is 1, info->port.count is %d\n", info->port.count);
-		info->port.count = 1;
-	}
-	if (--info->port.count < 0) {
-		printk(KERN_WARNING "rp_close: bad serial port count for "
-				"ttyR%d: %d\n", info->line, info->port.count);
-		info->port.count = 0;
-	}
-	if (info->port.count) {
-		spin_unlock_irqrestore(&info->slock, flags);
+	if (tty_port_close_start(port, tty, filp) == 0)
 		return;
-	}
-	info->flags |= ROCKET_CLOSING;
-	spin_unlock_irqrestore(&info->slock, flags);
 
 	cp = &info->channel;
-
-	/*
-	 * Notify the line discpline to only process XON/XOFF characters
-	 */
-	tty->closing = 1;
-
-	/*
-	 * If transmission was throttled by the application request,
-	 * just flush the xmit buffer.
-	 */
-	if (tty->flow_stopped)
-		rp_flush_buffer(tty);
-
-	/*
-	 * Wait for the transmit buffer to clear
-	 */
-	if (info->port.closing_wait != ROCKET_CLOSING_WAIT_NONE)
-		tty_wait_until_sent(tty, info->port.closing_wait);
 	/*
 	 * Before we drop DTR, make sure the UART transmitter
 	 * has completely drained; this is especially
@@ -1168,19 +1040,24 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 
 	clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 
-	if (info->port.blocked_open) {
-		if (info->port.close_delay) {
-			msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
+	/* We can't yet use tty_port_close_end as the buffer handling in this
+	   driver is a bit different to the usual */
+
+	if (port->blocked_open) {
+		if (port->close_delay) {
+			msleep_interruptible(jiffies_to_msecs(port->close_delay));
 		}
-		wake_up_interruptible(&info->port.open_wait);
+		wake_up_interruptible(&port->open_wait);
 	} else {
 		if (info->xmit_buf) {
 			free_page((unsigned long) info->xmit_buf);
 			info->xmit_buf = NULL;
 		}
 	}
-	info->flags &= ~(ROCKET_INITIALIZED | ROCKET_CLOSING | ROCKET_NORMAL_ACTIVE);
+	info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE);
 	tty->closing = 0;
+	tty_port_tty_set(port, NULL);
+	wake_up_interruptible(&port->close_wait);
 	complete_all(&info->close_wait);
 	atomic_dec(&rp_num_ports_open);
 
@@ -1195,7 +1072,7 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 static void rp_set_termios(struct tty_struct *tty,
 			   struct ktermios *old_termios)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned cflag;
 
@@ -1213,7 +1090,7 @@ static void rp_set_termios(struct tty_struct *tty,
 	/* Or CMSPAR */
 	tty->termios->c_cflag &= ~CMSPAR;
 
-	configure_r_port(info, old_termios);
+	configure_r_port(tty, info, old_termios);
 
 	cp = &info->channel;
 
@@ -1238,7 +1115,7 @@ static void rp_set_termios(struct tty_struct *tty,
 
 static int rp_break(struct tty_struct *tty, int break_state)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	unsigned long flags;
 
 	if (rocket_paranoia_check(info, "rp_break"))
@@ -1284,7 +1161,7 @@ static int sGetChanRI(CHANNEL_T * ChP)
  */
 static int rp_tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct r_port *info = (struct r_port *)tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	unsigned int control, result, ChanStatus;
 
 	ChanStatus = sGetChanStatusLo(&info->channel);
@@ -1305,7 +1182,7 @@ static int rp_tiocmget(struct tty_struct *tty, struct file *file)
 static int rp_tiocmset(struct tty_struct *tty, struct file *file,
 		    unsigned int set, unsigned int clear)
 {
-	struct r_port *info = (struct r_port *)tty->driver_data;
+	struct r_port *info = tty->driver_data;
 
 	if (set & TIOCM_RTS)
 		info->channel.TxControl[3] |= SET_RTS;
@@ -1338,7 +1215,8 @@ static int get_config(struct r_port *info, struct rocket_config __user *retinfo)
 	return 0;
 }
 
-static int set_config(struct r_port *info, struct rocket_config __user *new_info)
+static int set_config(struct tty_struct *tty, struct r_port *info,
+					struct rocket_config __user *new_info)
 {
 	struct rocket_config new_serial;
 
@@ -1350,7 +1228,7 @@ static int set_config(struct r_port *info, struct rocket_config __user *new_info
 		if ((new_serial.flags & ~ROCKET_USR_MASK) != (info->flags & ~ROCKET_USR_MASK))
 			return -EPERM;
 		info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK));
-		configure_r_port(info, NULL);
+		configure_r_port(tty, info, NULL);
 		return 0;
 	}
 
@@ -1359,15 +1237,15 @@ static int set_config(struct r_port *info, struct rocket_config __user *new_info
 	info->port.closing_wait = new_serial.closing_wait;
 
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
-		info->port.tty->alt_speed = 57600;
+		tty->alt_speed = 57600;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
-		info->port.tty->alt_speed = 115200;
+		tty->alt_speed = 115200;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
-		info->port.tty->alt_speed = 230400;
+		tty->alt_speed = 230400;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
-		info->port.tty->alt_speed = 460800;
+		tty->alt_speed = 460800;
 
-	configure_r_port(info, NULL);
+	configure_r_port(tty, info, NULL);
 	return 0;
 }
 
@@ -1434,7 +1312,7 @@ static int get_version(struct r_port *info, struct rocket_version __user *retver
 static int rp_ioctl(struct tty_struct *tty, struct file *file,
 		    unsigned int cmd, unsigned long arg)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	void __user *argp = (void __user *)arg;
 	int ret = 0;
 
@@ -1452,7 +1330,7 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file,
 		ret = get_config(info, argp);
 		break;
 	case RCKP_SET_CONFIG:
-		ret = set_config(info, argp);
+		ret = set_config(tty, info, argp);
 		break;
 	case RCKP_GET_PORTS:
 		ret = get_ports(info, argp);
@@ -1472,7 +1350,7 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file,
 
 static void rp_send_xchar(struct tty_struct *tty, char ch)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 
 	if (rocket_paranoia_check(info, "rp_send_xchar"))
@@ -1487,7 +1365,7 @@ static void rp_send_xchar(struct tty_struct *tty, char ch)
 
 static void rp_throttle(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 
 #ifdef ROCKET_DEBUG_THROTTLE
@@ -1507,7 +1385,7 @@ static void rp_throttle(struct tty_struct *tty)
 
 static void rp_unthrottle(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 #ifdef ROCKET_DEBUG_THROTTLE
 	printk(KERN_INFO "unthrottle %s: %d....\n", tty->name,
@@ -1534,7 +1412,7 @@ static void rp_unthrottle(struct tty_struct *tty)
  */
 static void rp_stop(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 
 #ifdef ROCKET_DEBUG_FLOW
 	printk(KERN_INFO "stop %s: %d %d....\n", tty->name,
@@ -1550,7 +1428,7 @@ static void rp_stop(struct tty_struct *tty)
 
 static void rp_start(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 
 #ifdef ROCKET_DEBUG_FLOW
 	printk(KERN_INFO "start %s: %d %d....\n", tty->name,
@@ -1570,7 +1448,7 @@ static void rp_start(struct tty_struct *tty)
  */
 static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned long orig_jiffies;
 	int check_time, exit_time;
@@ -1627,7 +1505,7 @@ static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
 static void rp_hangup(struct tty_struct *tty)
 {
 	CHANNEL_t *cp;
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 
 	if (rocket_paranoia_check(info, "rp_hangup"))
 		return;
@@ -1636,15 +1514,13 @@ static void rp_hangup(struct tty_struct *tty)
 	printk(KERN_INFO "rp_hangup of ttyR%d...\n", info->line);
 #endif
 	rp_flush_buffer(tty);
-	if (info->flags & ROCKET_CLOSING)
+	if (info->port.flags & ASYNC_CLOSING)
 		return;
 	if (info->port.count)
 		atomic_dec(&rp_num_ports_open);
 	clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 
-	info->port.count = 0;
-	info->flags &= ~ROCKET_NORMAL_ACTIVE;
-	info->port.tty = NULL;
+	tty_port_hangup(&info->port);
 
 	cp = &info->channel;
 	sDisRxFIFO(cp);
@@ -1653,7 +1529,7 @@ static void rp_hangup(struct tty_struct *tty)
 	sDisCTSFlowCtl(cp);
 	sDisTxSoftFlowCtl(cp);
 	sClrTxXOFF(cp);
-	info->flags &= ~ROCKET_INITIALIZED;
+	info->port.flags &= ~ASYNC_INITIALIZED;
 
 	wake_up_interruptible(&info->port.open_wait);
 }
@@ -1667,7 +1543,7 @@ static void rp_hangup(struct tty_struct *tty)
  */
 static int rp_put_char(struct tty_struct *tty, unsigned char ch)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned long flags;
 
@@ -1714,7 +1590,7 @@ static int rp_put_char(struct tty_struct *tty, unsigned char ch)
 static int rp_write(struct tty_struct *tty,
 		    const unsigned char *buf, int count)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	const unsigned char *b;
 	int c, retval = 0;
@@ -1764,7 +1640,8 @@ static int rp_write(struct tty_struct *tty,
 
 	/*  Write remaining data into the port's xmit_buf */
 	while (1) {
-		if (!info->port.tty)		/* Seemingly obligatory check... */
+		/* Hung up ? */
+		if (!test_bit(ASYNC_NORMAL_ACTIVE, &info->port.flags))
 			goto end;
 		c = min(count, XMIT_BUF_SIZE - info->xmit_cnt - 1);
 		c = min(c, XMIT_BUF_SIZE - info->xmit_head);
@@ -1806,7 +1683,7 @@ end:
  */
 static int rp_write_room(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	int ret;
 
 	if (rocket_paranoia_check(info, "rp_write_room"))
@@ -1827,7 +1704,7 @@ static int rp_write_room(struct tty_struct *tty)
  */
 static int rp_chars_in_buffer(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 
 	if (rocket_paranoia_check(info, "rp_chars_in_buffer"))
@@ -1848,7 +1725,7 @@ static int rp_chars_in_buffer(struct tty_struct *tty)
  */
 static void rp_flush_buffer(struct tty_struct *tty)
 {
-	struct r_port *info = (struct r_port *) tty->driver_data;
+	struct r_port *info = tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned long flags;
 
@@ -2371,6 +2248,11 @@ static const struct tty_operations rocket_ops = {
 	.tiocmset = rp_tiocmset,
 };
 
+static const struct tty_port_operations rocket_port_ops = {
+	.carrier_raised = carrier_raised,
+	.raise_dtr_rts = raise_dtr_rts,
+};
+
 /*
  * The module "startup" routine; it's run when the module is loaded.
  */
diff --git a/drivers/char/rocket.h b/drivers/char/rocket.h
index a8b09195ebba..ec863f35f1a9 100644
--- a/drivers/char/rocket.h
+++ b/drivers/char/rocket.h
@@ -39,7 +39,7 @@ struct rocket_version {
 /*
  * Rocketport flags
  */
-#define ROCKET_CALLOUT_NOHUP    0x00000001
+/*#define ROCKET_CALLOUT_NOHUP    0x00000001 */
 #define ROCKET_FORCE_CD		0x00000002
 #define ROCKET_HUP_NOTIFY	0x00000004
 #define ROCKET_SPLIT_TERMIOS	0x00000008
diff --git a/drivers/char/rocket_int.h b/drivers/char/rocket_int.h
index 21f3ff53ba32..67e0f1e778a2 100644
--- a/drivers/char/rocket_int.h
+++ b/drivers/char/rocket_int.h
@@ -1162,11 +1162,6 @@ struct r_port {
 /* number of characters left in xmit buffer before we ask for more */
 #define WAKEUP_CHARS 256
 
-/* Internal flags used only by the rocketport driver */
-#define ROCKET_INITIALIZED	0x80000000	/* Port is active */
-#define ROCKET_CLOSING		0x40000000	/* Serial port is closing */
-#define ROCKET_NORMAL_ACTIVE	0x20000000	/* Normal port is active */
-
 /*
  * Assigned major numbers for the Comtrol Rocketport
  */
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index 20d6efb6324e..e0d0f8b2696b 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -48,9 +48,10 @@
  *		CONFIG_HPET_EMULATE_RTC
  *	1.12a	Maciej W. Rozycki: Handle memory-mapped chips properly.
  *	1.12ac	Alan Cox: Allow read access to the day of week register
+ *	1.12b	David John: Remove calls to the BKL.
  */
 
-#define RTC_VERSION		"1.12ac"
+#define RTC_VERSION		"1.12b"
 
 /*
  *	Note that *all* calls to CMOS_READ and CMOS_WRITE are done with
@@ -73,7 +74,6 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/spinlock.h>
-#include <linux/smp_lock.h>
 #include <linux/sysctl.h>
 #include <linux/wait.h>
 #include <linux/bcd.h>
@@ -182,8 +182,8 @@ static int rtc_proc_open(struct inode *inode, struct file *file);
 
 /*
  * rtc_status is never changed by rtc_interrupt, and ioctl/open/close is
- * protected by the big kernel lock. However, ioctl can still disable the timer
- * in rtc_status and then with del_timer after the interrupt has read
+ * protected by the spin lock rtc_lock. However, ioctl can still disable the
+ * timer in rtc_status and then with del_timer after the interrupt has read
  * rtc_status but before mod_timer is called, which would then reenable the
  * timer (but you would need to have an awful timing before you'd trip on it)
  */
@@ -720,9 +720,7 @@ static int rtc_do_ioctl(unsigned int cmd, unsigned long arg, int kernel)
 static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	long ret;
-	lock_kernel();
 	ret = rtc_do_ioctl(cmd, arg, 0);
-	unlock_kernel();
 	return ret;
 }
 
@@ -731,12 +729,8 @@ static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
  *	Also clear the previous interrupt data on an open, and clean
  *	up things on a close.
  */
-
-/* We use rtc_lock to protect against concurrent opens. So the BKL is not
- * needed here. Or anywhere else in this driver. */
 static int rtc_open(struct inode *inode, struct file *file)
 {
-	lock_kernel();
 	spin_lock_irq(&rtc_lock);
 
 	if (rtc_status & RTC_IS_OPEN)
@@ -746,12 +740,10 @@ static int rtc_open(struct inode *inode, struct file *file)
 
 	rtc_irq_data = 0;
 	spin_unlock_irq(&rtc_lock);
-	unlock_kernel();
 	return 0;
 
 out_busy:
 	spin_unlock_irq(&rtc_lock);
-	unlock_kernel();
 	return -EBUSY;
 }
 
@@ -800,7 +792,6 @@ no_irq:
 }
 
 #ifdef RTC_IRQ
-/* Called without the kernel lock - fine */
 static unsigned int rtc_poll(struct file *file, poll_table *wait)
 {
 	unsigned long l;
diff --git a/drivers/char/selection.c b/drivers/char/selection.c
index 2978a49a172b..f29fbe9b8ed7 100644
--- a/drivers/char/selection.c
+++ b/drivers/char/selection.c
@@ -306,7 +306,7 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
  */
 int paste_selection(struct tty_struct *tty)
 {
-	struct vc_data *vc = (struct vc_data *)tty->driver_data;
+	struct vc_data *vc = tty->driver_data;
 	int	pasted = 0;
 	unsigned int count;
 	struct  tty_ldisc *ld;
diff --git a/drivers/char/ser_a2232.c b/drivers/char/ser_a2232.c
index 7b0c35207d9b..33872a219df6 100644
--- a/drivers/char/ser_a2232.c
+++ b/drivers/char/ser_a2232.c
@@ -122,7 +122,7 @@ static void a2232_disable_tx_interrupts(void *ptr);
 static void a2232_enable_tx_interrupts(void *ptr);
 static void a2232_disable_rx_interrupts(void *ptr);
 static void a2232_enable_rx_interrupts(void *ptr);
-static int  a2232_get_CD(void *ptr);
+static int  a2232_carrier_raised(struct tty_port *port);
 static void a2232_shutdown_port(void *ptr);
 static int  a2232_set_real_termios(void *ptr);
 static int  a2232_chars_in_buffer(void *ptr);
@@ -148,7 +148,6 @@ static struct real_driver a2232_real_driver = {
         a2232_enable_tx_interrupts,
         a2232_disable_rx_interrupts,
         a2232_enable_rx_interrupts,
-        a2232_get_CD,
         a2232_shutdown_port,
         a2232_set_real_termios,
         a2232_chars_in_buffer,
@@ -260,9 +259,10 @@ static void a2232_enable_rx_interrupts(void *ptr)
 	port->disable_rx = 0;
 }
 
-static int  a2232_get_CD(void *ptr)
+static int  a2232_carrier_raised(struct tty_port *port)
 {
-	return ((struct a2232_port *) ptr)->cd_status;
+	struct a2232_port *ap = container_of(port, struct a2232_port, gs.port);
+	return ap->cd_status;
 }
 
 static void a2232_shutdown_port(void *ptr)
@@ -460,14 +460,14 @@ static void a2232_throttle(struct tty_struct *tty)
    if switched on. So the only thing we can do at this
    layer here is not taking any characters out of the
    A2232 buffer any more. */
-	struct a2232_port *port = (struct a2232_port *) tty->driver_data;
+	struct a2232_port *port = tty->driver_data;
 	port->throttle_input = -1;
 }
 
 static void a2232_unthrottle(struct tty_struct *tty)
 {
 /* Unthrottle: dual to "throttle()" above. */
-	struct a2232_port *port = (struct a2232_port *) tty->driver_data;
+	struct a2232_port *port = tty->driver_data;
 	port->throttle_input = 0;
 }
 
@@ -638,6 +638,10 @@ int ch, err, n, p;
 	return IRQ_HANDLED;
 }
 
+static const struct tty_port_operations a2232_port_ops = {
+	.carrier_raised = a2232_carrier_raised,
+};
+
 static void a2232_init_portstructs(void)
 {
 	struct a2232_port *port;
@@ -645,6 +649,8 @@ static void a2232_init_portstructs(void)
 
 	for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) {
 		port = a2232_ports + i;
+		tty_port_init(&port->gs.port);
+		port->gs.port.ops = &a2232_port_ops;
 		port->which_a2232 = i/NUMLINES;
 		port->which_port_on_a2232 = i%NUMLINES;
 		port->disable_rx = port->throttle_input = port->cd_status = 0;
@@ -652,11 +658,6 @@ static void a2232_init_portstructs(void)
 		port->gs.close_delay = HZ/2;
 		port->gs.closing_wait = 30 * HZ;
 		port->gs.rd = &a2232_real_driver;
-#ifdef NEW_WRITE_LOCKING
-		mutex_init(&(port->gs.port_write_mutex));
-#endif
-		init_waitqueue_head(&port->gs.port.open_wait);
-		init_waitqueue_head(&port->gs.port.close_wait);
 	}
 }
 
diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c
index a8f15e6be594..f1f24f0ee26f 100644
--- a/drivers/char/serial167.c
+++ b/drivers/char/serial167.c
@@ -315,7 +315,7 @@ u_short write_cy_cmd(volatile u_char * base_addr, u_char cmd)
 
 static void cy_stop(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
 	int channel;
 	unsigned long flags;
@@ -337,7 +337,7 @@ static void cy_stop(struct tty_struct *tty)
 
 static void cy_start(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
 	int channel;
 	unsigned long flags;
@@ -1062,7 +1062,7 @@ static void config_setup(struct cyclades_port *info)
 
 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	unsigned long flags;
 
 #ifdef SERIAL_DEBUG_IO
@@ -1090,7 +1090,7 @@ static int cy_put_char(struct tty_struct *tty, unsigned char ch)
 
 static void cy_flush_chars(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	unsigned long flags;
 	volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
 	int channel;
@@ -1122,7 +1122,7 @@ static void cy_flush_chars(struct tty_struct *tty)
  */
 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	unsigned long flags;
 	int c, total = 0;
 
@@ -1166,7 +1166,7 @@ static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
 
 static int cy_write_room(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	int ret;
 
 #ifdef SERIAL_DEBUG_IO
@@ -1183,7 +1183,7 @@ static int cy_write_room(struct tty_struct *tty)
 
 static int cy_chars_in_buffer(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 
 #ifdef SERIAL_DEBUG_IO
 	printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt);	/* */
@@ -1197,7 +1197,7 @@ static int cy_chars_in_buffer(struct tty_struct *tty)
 
 static void cy_flush_buffer(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	unsigned long flags;
 
 #ifdef SERIAL_DEBUG_IO
@@ -1218,7 +1218,7 @@ static void cy_flush_buffer(struct tty_struct *tty)
  */
 static void cy_throttle(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	unsigned long flags;
 	volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
 	int channel;
@@ -1250,7 +1250,7 @@ static void cy_throttle(struct tty_struct *tty)
 
 static void cy_unthrottle(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	unsigned long flags;
 	volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
 	int channel;
@@ -1345,7 +1345,7 @@ check_and_exit:
 
 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	int channel;
 	volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
 	unsigned long flags;
@@ -1369,7 +1369,7 @@ static int
 cy_tiocmset(struct tty_struct *tty, struct file *file,
 	    unsigned int set, unsigned int clear)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	int channel;
 	volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
 	unsigned long flags;
@@ -1532,7 +1532,7 @@ cy_ioctl(struct tty_struct *tty, struct file *file,
 	 unsigned int cmd, unsigned long arg)
 {
 	unsigned long val;
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 	int ret_val = 0;
 	void __user *argp = (void __user *)arg;
 
@@ -1607,7 +1607,7 @@ cy_ioctl(struct tty_struct *tty, struct file *file,
 
 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 
 #ifdef SERIAL_DEBUG_OTHER
 	printk("cy_set_termios %s\n", tty->name);
@@ -1631,7 +1631,7 @@ static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 
 static void cy_close(struct tty_struct *tty, struct file *filp)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 
 /* CP('C'); */
 #ifdef SERIAL_DEBUG_OTHER
@@ -1698,7 +1698,7 @@ static void cy_close(struct tty_struct *tty, struct file *filp)
  */
 void cy_hangup(struct tty_struct *tty)
 {
-	struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+	struct cyclades_port *info = tty->driver_data;
 
 #ifdef SERIAL_DEBUG_OTHER
 	printk("cy_hangup %s\n", tty->name);	/* */
diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index a16b94f12eb2..3c67c3d83de9 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -1450,7 +1450,7 @@ static int sx_open(struct tty_struct *tty, struct file *filp)
 
 static void sx_flush_buffer(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	unsigned long flags;
 	struct specialix_board  *bp;
 
@@ -1472,7 +1472,7 @@ static void sx_flush_buffer(struct tty_struct *tty)
 
 static void sx_close(struct tty_struct *tty, struct file *filp)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp;
 	unsigned long flags;
 	unsigned long timeout;
@@ -1585,7 +1585,7 @@ static void sx_close(struct tty_struct *tty, struct file *filp)
 static int sx_write(struct tty_struct *tty,
 					const unsigned char *buf, int count)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp;
 	int c, total = 0;
 	unsigned long flags;
@@ -1637,7 +1637,7 @@ static int sx_write(struct tty_struct *tty,
 
 static int sx_put_char(struct tty_struct *tty, unsigned char ch)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	unsigned long flags;
 	struct specialix_board  *bp;
 
@@ -1676,7 +1676,7 @@ static int sx_put_char(struct tty_struct *tty, unsigned char ch)
 
 static void sx_flush_chars(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	unsigned long flags;
 	struct specialix_board  *bp = port_Board(port);
 
@@ -1703,7 +1703,7 @@ static void sx_flush_chars(struct tty_struct *tty)
 
 static int sx_write_room(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	int	ret;
 
 	func_enter();
@@ -1724,7 +1724,7 @@ static int sx_write_room(struct tty_struct *tty)
 
 static int sx_chars_in_buffer(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 
 	func_enter();
 
@@ -1738,7 +1738,7 @@ static int sx_chars_in_buffer(struct tty_struct *tty)
 
 static int sx_tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp;
 	unsigned char status;
 	unsigned int result;
@@ -1780,7 +1780,7 @@ static int sx_tiocmget(struct tty_struct *tty, struct file *file)
 static int sx_tiocmset(struct tty_struct *tty, struct file *file,
 		       unsigned int set, unsigned int clear)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	unsigned long flags;
 	struct specialix_board *bp;
 
@@ -1820,7 +1820,7 @@ static int sx_tiocmset(struct tty_struct *tty, struct file *file,
 
 static int sx_send_break(struct tty_struct *tty, int length)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp = port_Board(port);
 	unsigned long flags;
 
@@ -1931,7 +1931,7 @@ static int sx_get_serial_info(struct specialix_port *port,
 static int sx_ioctl(struct tty_struct *tty, struct file *filp,
 				unsigned int cmd, unsigned long arg)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	void __user *argp = (void __user *)arg;
 
 	func_enter();
@@ -1959,7 +1959,7 @@ static int sx_ioctl(struct tty_struct *tty, struct file *filp,
 
 static void sx_throttle(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp;
 	unsigned long flags;
 
@@ -2004,7 +2004,7 @@ static void sx_throttle(struct tty_struct *tty)
 
 static void sx_unthrottle(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp;
 	unsigned long flags;
 
@@ -2045,7 +2045,7 @@ static void sx_unthrottle(struct tty_struct *tty)
 
 static void sx_stop(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp;
 	unsigned long flags;
 
@@ -2072,7 +2072,7 @@ static void sx_stop(struct tty_struct *tty)
 
 static void sx_start(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp;
 	unsigned long flags;
 
@@ -2100,7 +2100,7 @@ static void sx_start(struct tty_struct *tty)
 
 static void sx_hangup(struct tty_struct *tty)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	struct specialix_board *bp;
 	unsigned long flags;
 
@@ -2135,7 +2135,7 @@ static void sx_hangup(struct tty_struct *tty)
 static void sx_set_termios(struct tty_struct *tty,
 					struct ktermios *old_termios)
 {
-	struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+	struct specialix_port *port = tty->driver_data;
 	unsigned long flags;
 	struct specialix_board  *bp;
 
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
index 963b03fb29e5..e1e0dd89ac9a 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -130,6 +130,8 @@ static char		stl_unwanted[SC26198_RXFIFOSIZE];
 static DEFINE_MUTEX(stl_brdslock);
 static struct stlbrd		*stl_brds[STL_MAXBRDS];
 
+static const struct tty_port_operations stl_port_ops;
+
 /*
  *	Per board state flags. Used with the state field of the board struct.
  *	Not really much here!
@@ -407,7 +409,6 @@ static int	stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, uns
 static int	stl_brdinit(struct stlbrd *brdp);
 static int	stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp);
 static int	stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
-static int	stl_waitcarrier(struct tty_struct *tty, struct stlport *portp, struct file *filp);
 
 /*
  *	CD1400 uart specific handling functions.
@@ -703,8 +704,9 @@ static int stl_open(struct tty_struct *tty, struct file *filp)
 {
 	struct stlport	*portp;
 	struct stlbrd	*brdp;
+	struct tty_port *port;
 	unsigned int	minordev, brdnr, panelnr;
-	int		portnr, rc;
+	int		portnr;
 
 	pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
 
@@ -715,6 +717,7 @@ static int stl_open(struct tty_struct *tty, struct file *filp)
 	brdp = stl_brds[brdnr];
 	if (brdp == NULL)
 		return -ENODEV;
+
 	minordev = MINOR2PORT(minordev);
 	for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
 		if (brdp->panels[panelnr] == NULL)
@@ -731,16 +734,17 @@ static int stl_open(struct tty_struct *tty, struct file *filp)
 	portp = brdp->panels[panelnr]->ports[portnr];
 	if (portp == NULL)
 		return -ENODEV;
+	port = &portp->port;
 
 /*
  *	On the first open of the device setup the port hardware, and
  *	initialize the per port data structure.
  */
-	tty_port_tty_set(&portp->port, tty);
+	tty_port_tty_set(port, tty);
 	tty->driver_data = portp;
-	portp->port.count++;
+	port->count++;
 
-	if ((portp->port.flags & ASYNC_INITIALIZED) == 0) {
+	if ((port->flags & ASYNC_INITIALIZED) == 0) {
 		if (!portp->tx.buf) {
 			portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
 			if (!portp->tx.buf)
@@ -754,91 +758,24 @@ static int stl_open(struct tty_struct *tty, struct file *filp)
 		stl_enablerxtx(portp, 1, 1);
 		stl_startrxtx(portp, 1, 0);
 		clear_bit(TTY_IO_ERROR, &tty->flags);
-		portp->port.flags |= ASYNC_INITIALIZED;
-	}
-
-/*
- *	Check if this port is in the middle of closing. If so then wait
- *	until it is closed then return error status, based on flag settings.
- *	The sleep here does not need interrupt protection since the wakeup
- *	for it is done with the same context.
- */
-	if (portp->port.flags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&portp->port.close_wait);
-		if (portp->port.flags & ASYNC_HUP_NOTIFY)
-			return -EAGAIN;
-		return -ERESTARTSYS;
+		port->flags |= ASYNC_INITIALIZED;
 	}
-
-/*
- *	Based on type of open being done check if it can overlap with any
- *	previous opens still in effect. If we are a normal serial device
- *	then also we might have to wait for carrier.
- */
-	if (!(filp->f_flags & O_NONBLOCK))
-		if ((rc = stl_waitcarrier(tty, portp, filp)) != 0)
-			return rc;
-
-	portp->port.flags |= ASYNC_NORMAL_ACTIVE;
-
-	return 0;
+	return tty_port_block_til_ready(port, tty, filp);
 }
 
 /*****************************************************************************/
 
-/*
- *	Possibly need to wait for carrier (DCD signal) to come high. Say
- *	maybe because if we are clocal then we don't need to wait...
- */
-
-static int stl_waitcarrier(struct tty_struct *tty, struct stlport *portp,
-							struct file *filp)
+static int stl_carrier_raised(struct tty_port *port)
 {
-	unsigned long	flags;
-	int		rc, doclocal;
-
-	pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
-
-	rc = 0;
-	doclocal = 0;
-
-	spin_lock_irqsave(&stallion_lock, flags);
-
-	if (tty->termios->c_cflag & CLOCAL)
-		doclocal++;
-
-	portp->openwaitcnt++;
-	if (! tty_hung_up_p(filp))
-		portp->port.count--;
-
-	for (;;) {
-		/* Takes brd_lock internally */
-		stl_setsignals(portp, 1, 1);
-		if (tty_hung_up_p(filp) ||
-		    ((portp->port.flags & ASYNC_INITIALIZED) == 0)) {
-			if (portp->port.flags & ASYNC_HUP_NOTIFY)
-				rc = -EBUSY;
-			else
-				rc = -ERESTARTSYS;
-			break;
-		}
-		if (((portp->port.flags & ASYNC_CLOSING) == 0) &&
-		    (doclocal || (portp->sigs & TIOCM_CD)))
-			break;
-		if (signal_pending(current)) {
-			rc = -ERESTARTSYS;
-			break;
-		}
-		/* FIXME */
-		interruptible_sleep_on(&portp->port.open_wait);
-	}
-
-	if (! tty_hung_up_p(filp))
-		portp->port.count++;
-	portp->openwaitcnt--;
-	spin_unlock_irqrestore(&stallion_lock, flags);
+	struct stlport *portp = container_of(port, struct stlport, port);
+	return (portp->sigs & TIOCM_CD) ? 1 : 0;
+}
 
-	return rc;
+static void stl_raise_dtr_rts(struct tty_port *port)
+{
+	struct stlport *portp = container_of(port, struct stlport, port);
+	/* Takes brd_lock internally */
+	stl_setsignals(portp, 1, 1);
 }
 
 /*****************************************************************************/
@@ -890,47 +827,29 @@ static void stl_waituntilsent(struct tty_struct *tty, int timeout)
 static void stl_close(struct tty_struct *tty, struct file *filp)
 {
 	struct stlport	*portp;
+	struct tty_port *port;
 	unsigned long	flags;
 
 	pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
 
 	portp = tty->driver_data;
-	if (portp == NULL)
-		return;
+	BUG_ON(portp == NULL);
 
-	spin_lock_irqsave(&stallion_lock, flags);
-	if (tty_hung_up_p(filp)) {
-		spin_unlock_irqrestore(&stallion_lock, flags);
-		return;
-	}
-	if ((tty->count == 1) && (portp->port.count != 1))
-		portp->port.count = 1;
-	if (portp->port.count-- > 1) {
-		spin_unlock_irqrestore(&stallion_lock, flags);
-		return;
-	}
-
-	portp->port.count = 0;
-	portp->port.flags |= ASYNC_CLOSING;
+	port = &portp->port;
 
+	if (tty_port_close_start(port, tty, filp) == 0)
+		return;
 /*
  *	May want to wait for any data to drain before closing. The BUSY
  *	flag keeps track of whether we are still sending or not - it is
  *	very accurate for the cd1400, not quite so for the sc26198.
  *	(The sc26198 has no "end-of-data" interrupt only empty FIFO)
  */
-	tty->closing = 1;
-
-	spin_unlock_irqrestore(&stallion_lock, flags);
-
-	if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
-		tty_wait_until_sent(tty, portp->closing_wait);
 	stl_waituntilsent(tty, (HZ / 2));
 
-
-	spin_lock_irqsave(&stallion_lock, flags);
+	spin_lock_irqsave(&port->lock, flags);
 	portp->port.flags &= ~ASYNC_INITIALIZED;
-	spin_unlock_irqrestore(&stallion_lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
 
 	stl_disableintrs(portp);
 	if (tty->termios->c_cflag & HUPCL)
@@ -944,20 +863,9 @@ static void stl_close(struct tty_struct *tty, struct file *filp)
 		portp->tx.head = NULL;
 		portp->tx.tail = NULL;
 	}
-	set_bit(TTY_IO_ERROR, &tty->flags);
-	tty_ldisc_flush(tty);
 
-	tty->closing = 0;
-	tty_port_tty_set(&portp->port, NULL);
-
-	if (portp->openwaitcnt) {
-		if (portp->close_delay)
-			msleep_interruptible(jiffies_to_msecs(portp->close_delay));
-		wake_up_interruptible(&portp->port.open_wait);
-	}
-
-	portp->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-	wake_up_interruptible(&portp->port.close_wait);
+	tty_port_close_end(port, tty);
+	tty_port_tty_set(port, NULL);
 }
 
 /*****************************************************************************/
@@ -1405,14 +1313,20 @@ static void stl_stop(struct tty_struct *tty)
 static void stl_hangup(struct tty_struct *tty)
 {
 	struct stlport	*portp;
+	struct tty_port *port;
+	unsigned long flags;
 
 	pr_debug("stl_hangup(tty=%p)\n", tty);
 
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
+	port = &portp->port;
+
+	spin_lock_irqsave(&port->lock, flags);
+	port->flags &= ~ASYNC_INITIALIZED;
+	spin_unlock_irqrestore(&port->lock, flags);
 
-	portp->port.flags &= ~ASYNC_INITIALIZED;
 	stl_disableintrs(portp);
 	if (tty->termios->c_cflag & HUPCL)
 		stl_setsignals(portp, 0, 0);
@@ -1426,10 +1340,7 @@ static void stl_hangup(struct tty_struct *tty)
 		portp->tx.head = NULL;
 		portp->tx.tail = NULL;
 	}
-	tty_port_tty_set(&portp->port, NULL);
-	portp->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-	portp->port.count = 0;
-	wake_up_interruptible(&portp->port.open_wait);
+	tty_port_hangup(port);
 }
 
 /*****************************************************************************/
@@ -1776,6 +1687,7 @@ static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
 			break;
 		}
 		tty_port_init(&portp->port);
+		portp->port.ops = &stl_port_ops;
 		portp->magic = STL_PORTMAGIC;
 		portp->portnr = i;
 		portp->brdnr = panelp->brdnr;
@@ -2659,6 +2571,11 @@ static const struct tty_operations stl_ops = {
 	.tiocmset = stl_tiocmset,
 };
 
+static const struct tty_port_operations stl_port_ops = {
+	.carrier_raised = stl_carrier_raised,
+	.raise_dtr_rts = stl_raise_dtr_rts,
+};
+
 /*****************************************************************************/
 /*                       CD1400 HARDWARE FUNCTIONS                           */
 /*****************************************************************************/
diff --git a/drivers/char/sx.c b/drivers/char/sx.c
index ba4e86281fbf..b60be7b0decf 100644
--- a/drivers/char/sx.c
+++ b/drivers/char/sx.c
@@ -279,7 +279,7 @@ static void sx_disable_tx_interrupts(void *ptr);
 static void sx_enable_tx_interrupts(void *ptr);
 static void sx_disable_rx_interrupts(void *ptr);
 static void sx_enable_rx_interrupts(void *ptr);
-static int sx_get_CD(void *ptr);
+static int sx_carrier_raised(struct tty_port *port);
 static void sx_shutdown_port(void *ptr);
 static int sx_set_real_termios(void *ptr);
 static void sx_close(void *ptr);
@@ -360,7 +360,6 @@ static struct real_driver sx_real_driver = {
 	sx_enable_tx_interrupts,
 	sx_disable_rx_interrupts,
 	sx_enable_rx_interrupts,
-	sx_get_CD,
 	sx_shutdown_port,
 	sx_set_real_termios,
 	sx_chars_in_buffer,
@@ -791,7 +790,7 @@ static int sx_getsignals(struct sx_port *port)
 	sx_dprintk(SX_DEBUG_MODEMSIGNALS, "getsignals: %d/%d  (%d/%d) "
 			"%02x/%02x\n",
 			(o_stat & OP_DTR) != 0, (o_stat & OP_RTS) != 0,
-			port->c_dcd, sx_get_CD(port),
+			port->c_dcd, tty_port_carrier_raised(&port->gs.port),
 			sx_read_channel_byte(port, hi_ip),
 			sx_read_channel_byte(port, hi_state));
 
@@ -1190,7 +1189,7 @@ static inline void sx_check_modem_signals(struct sx_port *port)
 
 	hi_state = sx_read_channel_byte(port, hi_state);
 	sx_dprintk(SX_DEBUG_MODEMSIGNALS, "Checking modem signals (%d/%d)\n",
-			port->c_dcd, sx_get_CD(port));
+			port->c_dcd, tty_port_carrier_raised(&port->gs.port));
 
 	if (hi_state & ST_BREAK) {
 		hi_state &= ~ST_BREAK;
@@ -1202,11 +1201,11 @@ static inline void sx_check_modem_signals(struct sx_port *port)
 		hi_state &= ~ST_DCD;
 		sx_dprintk(SX_DEBUG_MODEMSIGNALS, "got a DCD change.\n");
 		sx_write_channel_byte(port, hi_state, hi_state);
-		c_dcd = sx_get_CD(port);
+		c_dcd = tty_port_carrier_raised(&port->gs.port);
 		sx_dprintk(SX_DEBUG_MODEMSIGNALS, "DCD is now %d\n", c_dcd);
 		if (c_dcd != port->c_dcd) {
 			port->c_dcd = c_dcd;
-			if (sx_get_CD(port)) {
+			if (tty_port_carrier_raised(&port->gs.port)) {
 				/* DCD went UP */
 				if ((sx_read_channel_byte(port, hi_hstat) !=
 						HS_IDLE_CLOSED) &&
@@ -1415,13 +1414,10 @@ static void sx_enable_rx_interrupts(void *ptr)
 }
 
 /* Jeez. Isn't this simple? */
-static int sx_get_CD(void *ptr)
+static int sx_carrier_raised(struct tty_port *port)
 {
-	struct sx_port *port = ptr;
-	func_enter2();
-
-	func_exit();
-	return ((sx_read_channel_byte(port, hi_ip) & IP_DCD) != 0);
+	struct sx_port *sp = container_of(port, struct sx_port, gs.port);
+	return ((sx_read_channel_byte(sp, hi_ip) & IP_DCD) != 0);
 }
 
 /* Jeez. Isn't this simple? */
@@ -1536,7 +1532,7 @@ static int sx_open(struct tty_struct *tty, struct file *filp)
 	}
 	/* tty->low_latency = 1; */
 
-	port->c_dcd = sx_get_CD(port);
+	port->c_dcd = sx_carrier_raised(&port->gs.port);
 	sx_dprintk(SX_DEBUG_OPEN, "at open: cd=%d\n", port->c_dcd);
 
 	func_exit();
@@ -1945,7 +1941,7 @@ static int sx_ioctl(struct tty_struct *tty, struct file *filp,
 
 static void sx_throttle(struct tty_struct *tty)
 {
-	struct sx_port *port = (struct sx_port *)tty->driver_data;
+	struct sx_port *port = tty->driver_data;
 
 	func_enter2();
 	/* If the port is using any type of input flow
@@ -1959,7 +1955,7 @@ static void sx_throttle(struct tty_struct *tty)
 
 static void sx_unthrottle(struct tty_struct *tty)
 {
-	struct sx_port *port = (struct sx_port *)tty->driver_data;
+	struct sx_port *port = tty->driver_data;
 
 	func_enter2();
 	/* Always unthrottle even if flow control is not enabled on
@@ -2354,6 +2350,10 @@ static const struct tty_operations sx_ops = {
 	.tiocmset = sx_tiocmset,
 };
 
+static const struct tty_port_operations sx_port_ops = {
+	.carrier_raised = sx_carrier_raised,
+};
+
 static int sx_init_drivers(void)
 {
 	int error;
@@ -2410,6 +2410,7 @@ static int sx_init_portstructs(int nboards, int nports)
 		for (j = 0; j < boards[i].nports; j++) {
 			sx_dprintk(SX_DEBUG_INIT, "initing port %d\n", j);
 			tty_port_init(&port->gs.port);
+			port->gs.port.ops = &sx_port_ops;
 			port->gs.magic = SX_MAGIC;
 			port->gs.close_delay = HZ / 2;
 			port->gs.closing_wait = 30 * HZ;
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 500f5176b6ba..b8063d4cad32 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -977,7 +977,7 @@ static void ldisc_receive_buf(struct tty_struct *tty,
  */
 static void mgsl_stop(struct tty_struct *tty)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 	
 	if (mgsl_paranoia_check(info, tty->name, "mgsl_stop"))
@@ -1000,7 +1000,7 @@ static void mgsl_stop(struct tty_struct *tty)
  */
 static void mgsl_start(struct tty_struct *tty)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 	
 	if (mgsl_paranoia_check(info, tty->name, "mgsl_start"))
@@ -2057,7 +2057,7 @@ static int mgsl_put_char(struct tty_struct *tty, unsigned char ch)
  */
 static void mgsl_flush_chars(struct tty_struct *tty)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 				
 	if ( debug_level >= DEBUG_LEVEL_INFO )
@@ -2109,7 +2109,7 @@ static int mgsl_write(struct tty_struct * tty,
 		    const unsigned char *buf, int count)
 {
 	int	c, ret = 0;
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 	
 	if ( debug_level >= DEBUG_LEVEL_INFO )
@@ -2232,7 +2232,7 @@ cleanup:
  */
 static int mgsl_write_room(struct tty_struct *tty)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	int	ret;
 				
 	if (mgsl_paranoia_check(info, tty->name, "mgsl_write_room"))
@@ -2267,7 +2267,7 @@ static int mgsl_write_room(struct tty_struct *tty)
  */
 static int mgsl_chars_in_buffer(struct tty_struct *tty)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 			 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgsl_chars_in_buffer(%s)\n",
@@ -2301,7 +2301,7 @@ static int mgsl_chars_in_buffer(struct tty_struct *tty)
  */
 static void mgsl_flush_buffer(struct tty_struct *tty)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -2329,7 +2329,7 @@ static void mgsl_flush_buffer(struct tty_struct *tty)
  */
 static void mgsl_send_xchar(struct tty_struct *tty, char ch)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -2358,7 +2358,7 @@ static void mgsl_send_xchar(struct tty_struct *tty, char ch)
  */
 static void mgsl_throttle(struct tty_struct * tty)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -2388,7 +2388,7 @@ static void mgsl_throttle(struct tty_struct * tty)
  */
 static void mgsl_unthrottle(struct tty_struct * tty)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -2841,7 +2841,7 @@ static int modem_input_wait(struct mgsl_struct *info,int arg)
  */
 static int tiocmget(struct tty_struct *tty, struct file *file)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned int result;
  	unsigned long flags;
 
@@ -2867,7 +2867,7 @@ static int tiocmget(struct tty_struct *tty, struct file *file)
 static int tiocmset(struct tty_struct *tty, struct file *file,
 		    unsigned int set, unsigned int clear)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
  	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -2898,7 +2898,7 @@ static int tiocmset(struct tty_struct *tty, struct file *file,
  */
 static int mgsl_break(struct tty_struct *tty, int break_state)
 {
-	struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct * info = tty->driver_data;
 	unsigned long flags;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -2932,7 +2932,7 @@ static int mgsl_break(struct tty_struct *tty, int break_state)
 static int mgsl_ioctl(struct tty_struct *tty, struct file * file,
 		    unsigned int cmd, unsigned long arg)
 {
-	struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct * info = tty->driver_data;
 	int ret;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -3042,7 +3042,7 @@ static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigne
  */
 static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 {
-	struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct *info = tty->driver_data;
 	unsigned long flags;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -3096,7 +3096,7 @@ static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termio
  */
 static void mgsl_close(struct tty_struct *tty, struct file * filp)
 {
-	struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct * info = tty->driver_data;
 
 	if (mgsl_paranoia_check(info, tty->name, "mgsl_close"))
 		return;
@@ -3104,70 +3104,18 @@ static void mgsl_close(struct tty_struct *tty, struct file * filp)
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgsl_close(%s) entry, count=%d\n",
 			 __FILE__,__LINE__, info->device_name, info->port.count);
-			 
-	if (!info->port.count)
-		return;
 
-	if (tty_hung_up_p(filp))
+	if (tty_port_close_start(&info->port, tty, filp) == 0)			 
 		goto cleanup;
 			
-	if ((tty->count == 1) && (info->port.count != 1)) {
-		/*
-		 * tty->count is 1 and the tty structure will be freed.
-		 * info->port.count should be one in this case.
-		 * if it's not, correct it so that the port is shutdown.
-		 */
-		printk("mgsl_close: bad refcount; tty->count is 1, "
-		       "info->port.count is %d\n", info->port.count);
-		info->port.count = 1;
-	}
-	
-	info->port.count--;
-	
-	/* if at least one open remaining, leave hardware active */
-	if (info->port.count)
-		goto cleanup;
-	
-	info->port.flags |= ASYNC_CLOSING;
-	
-	/* set tty->closing to notify line discipline to 
-	 * only process XON/XOFF characters. Only the N_TTY
-	 * discipline appears to use this (ppp does not).
-	 */
-	tty->closing = 1;
-	
-	/* wait for transmit data to clear all layers */
-	
-	if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) {
-		if (debug_level >= DEBUG_LEVEL_INFO)
-			printk("%s(%d):mgsl_close(%s) calling tty_wait_until_sent\n",
-				 __FILE__,__LINE__, info->device_name );
-		tty_wait_until_sent(tty, info->port.closing_wait);
-	}
-		
  	if (info->port.flags & ASYNC_INITIALIZED)
  		mgsl_wait_until_sent(tty, info->timeout);
-
 	mgsl_flush_buffer(tty);
-
 	tty_ldisc_flush(tty);
-		
 	shutdown(info);
-	
-	tty->closing = 0;
+
+	tty_port_close_end(&info->port, tty);	
 	info->port.tty = NULL;
-	
-	if (info->port.blocked_open) {
-		if (info->port.close_delay) {
-			msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
-		}
-		wake_up_interruptible(&info->port.open_wait);
-	}
-	
-	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-			 
-	wake_up_interruptible(&info->port.close_wait);
-	
 cleanup:			
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__,
@@ -3188,7 +3136,7 @@ cleanup:
  */
 static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout)
 {
-	struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct * info = tty->driver_data;
 	unsigned long orig_jiffies, char_time;
 
 	if (!info )
@@ -3261,7 +3209,7 @@ exit:
  */
 static void mgsl_hangup(struct tty_struct *tty)
 {
-	struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
+	struct mgsl_struct * info = tty->driver_data;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgsl_hangup(%s)\n",
@@ -3281,6 +3229,35 @@ static void mgsl_hangup(struct tty_struct *tty)
 	
 }	/* end of mgsl_hangup() */
 
+/*
+ * carrier_raised()
+ *
+ *	Return true if carrier is raised
+ */
+
+static int carrier_raised(struct tty_port *port)
+{
+	unsigned long flags;
+	struct mgsl_struct *info = container_of(port, struct mgsl_struct, port);
+	
+	spin_lock_irqsave(&info->irq_spinlock, flags);
+ 	usc_get_serial_signals(info);
+	spin_unlock_irqrestore(&info->irq_spinlock, flags);
+	return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
+}
+
+static void raise_dtr_rts(struct tty_port *port)
+{
+	struct mgsl_struct *info = container_of(port, struct mgsl_struct, port);
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->irq_spinlock,flags);
+	info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ 	usc_set_serial_signals(info);
+	spin_unlock_irqrestore(&info->irq_spinlock,flags);
+}
+
+
 /* block_til_ready()
  * 
  * 	Block the current process until the specified port
@@ -3302,6 +3279,8 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 	bool		do_clocal = false;
 	bool		extra_count = false;
 	unsigned long	flags;
+	int		dcd;
+	struct tty_port *port = &info->port;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):block_til_ready on %s\n",
@@ -3309,7 +3288,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 
 	if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
 		/* nonblock mode is set or port is not enabled */
-		info->port.flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 
@@ -3318,50 +3297,42 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 
 	/* Wait for carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, info->port.count is dropped by one, so that
+	 * this loop, port->count is dropped by one, so that
 	 * mgsl_close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 	 
 	retval = 0;
-	add_wait_queue(&info->port.open_wait, &wait);
+	add_wait_queue(&port->open_wait, &wait);
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):block_til_ready before block on %s count=%d\n",
-			 __FILE__,__LINE__, tty->driver->name, info->port.count );
+			 __FILE__,__LINE__, tty->driver->name, port->count );
 
 	spin_lock_irqsave(&info->irq_spinlock, flags);
 	if (!tty_hung_up_p(filp)) {
 		extra_count = true;
-		info->port.count--;
+		port->count--;
 	}
 	spin_unlock_irqrestore(&info->irq_spinlock, flags);
-	info->port.blocked_open++;
+	port->blocked_open++;
 	
 	while (1) {
-		if (tty->termios->c_cflag & CBAUD) {
-			spin_lock_irqsave(&info->irq_spinlock,flags);
-			info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
-		 	usc_set_serial_signals(info);
-			spin_unlock_irqrestore(&info->irq_spinlock,flags);
-		}
+		if (tty->termios->c_cflag & CBAUD)
+			tty_port_raise_dtr_rts(port);
 		
 		set_current_state(TASK_INTERRUPTIBLE);
 		
-		if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){
-			retval = (info->port.flags & ASYNC_HUP_NOTIFY) ?
+		if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
+			retval = (port->flags & ASYNC_HUP_NOTIFY) ?
 					-EAGAIN : -ERESTARTSYS;
 			break;
 		}
 		
-		spin_lock_irqsave(&info->irq_spinlock,flags);
-	 	usc_get_serial_signals(info);
-		spin_unlock_irqrestore(&info->irq_spinlock,flags);
+		dcd = tty_port_carrier_raised(&info->port);
 		
- 		if (!(info->port.flags & ASYNC_CLOSING) &&
- 		    (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
+ 		if (!(port->flags & ASYNC_CLOSING) && (do_clocal || dcd))
  			break;
-		}
 			
 		if (signal_pending(current)) {
 			retval = -ERESTARTSYS;
@@ -3370,24 +3341,25 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 		
 		if (debug_level >= DEBUG_LEVEL_INFO)
 			printk("%s(%d):block_til_ready blocking on %s count=%d\n",
-				 __FILE__,__LINE__, tty->driver->name, info->port.count );
+				 __FILE__,__LINE__, tty->driver->name, port->count );
 				 
 		schedule();
 	}
 	
 	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->port.open_wait, &wait);
+	remove_wait_queue(&port->open_wait, &wait);
 	
+	/* FIXME: Racy on hangup during close wait */
 	if (extra_count)
-		info->port.count++;
-	info->port.blocked_open--;
+		port->count++;
+	port->blocked_open--;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
-			 __FILE__,__LINE__, tty->driver->name, info->port.count );
+			 __FILE__,__LINE__, tty->driver->name, port->count );
 			 
 	if (!retval)
-		info->port.flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 		
 	return retval;
 	
@@ -4304,6 +4276,12 @@ static void mgsl_add_device( struct mgsl_struct *info )
 
 }	/* end of mgsl_add_device() */
 
+static const struct tty_port_operations mgsl_port_ops = {
+	.carrier_raised = carrier_raised,
+	.raise_dtr_rts = raise_dtr_rts,
+};
+
+
 /* mgsl_allocate_device()
  * 
  * 	Allocate and initialize a device instance structure
@@ -4322,6 +4300,7 @@ static struct mgsl_struct* mgsl_allocate_device(void)
 		printk("Error can't allocate device instance data\n");
 	} else {
 		tty_port_init(&info->port);
+		info->port.ops = &mgsl_port_ops;
 		info->magic = MGSL_MAGIC;
 		INIT_WORK(&info->task, mgsl_bh_handler);
 		info->max_frame_size = 4096;
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index 08911ed66494..53544e21f191 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -720,44 +720,9 @@ static void close(struct tty_struct *tty, struct file *filp)
 		return;
 	DBGINFO(("%s close entry, count=%d\n", info->device_name, info->port.count));
 
-	if (!info->port.count)
-		return;
-
-	if (tty_hung_up_p(filp))
-		goto cleanup;
-
-	if ((tty->count == 1) && (info->port.count != 1)) {
-		/*
-		 * tty->count is 1 and the tty structure will be freed.
-		 * info->port.count should be one in this case.
-		 * if it's not, correct it so that the port is shutdown.
-		 */
-		DBGERR(("%s close: bad refcount; tty->count=1, "
-		       "info->port.count=%d\n", info->device_name, info->port.count));
-		info->port.count = 1;
-	}
-
-	info->port.count--;
-
-	/* if at least one open remaining, leave hardware active */
-	if (info->port.count)
+	if (tty_port_close_start(&info->port, tty, filp) == 0)
 		goto cleanup;
 
-	info->port.flags |= ASYNC_CLOSING;
-
-	/* set tty->closing to notify line discipline to
-	 * only process XON/XOFF characters. Only the N_TTY
-	 * discipline appears to use this (ppp does not).
-	 */
-	tty->closing = 1;
-
-	/* wait for transmit data to clear all layers */
-
-	if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) {
-		DBGINFO(("%s call tty_wait_until_sent\n", info->device_name));
-		tty_wait_until_sent(tty, info->port.closing_wait);
-	}
-
  	if (info->port.flags & ASYNC_INITIALIZED)
  		wait_until_sent(tty, info->timeout);
 	flush_buffer(tty);
@@ -765,20 +730,8 @@ static void close(struct tty_struct *tty, struct file *filp)
 
 	shutdown(info);
 
-	tty->closing = 0;
+	tty_port_close_end(&info->port, tty);
 	info->port.tty = NULL;
-
-	if (info->port.blocked_open) {
-		if (info->port.close_delay) {
-			msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
-		}
-		wake_up_interruptible(&info->port.open_wait);
-	}
-
-	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-
-	wake_up_interruptible(&info->port.close_wait);
-
 cleanup:
 	DBGINFO(("%s close exit, count=%d\n", tty->driver->name, info->port.count));
 }
@@ -3132,6 +3085,29 @@ static int tiocmset(struct tty_struct *tty, struct file *file,
 	return 0;
 }
 
+static int carrier_raised(struct tty_port *port)
+{
+	unsigned long flags;
+	struct slgt_info *info = container_of(port, struct slgt_info, port);
+
+	spin_lock_irqsave(&info->lock,flags);
+ 	get_signals(info);
+	spin_unlock_irqrestore(&info->lock,flags);
+	return (info->signals & SerialSignal_DCD) ? 1 : 0;
+}
+
+static void raise_dtr_rts(struct tty_port *port)
+{
+	unsigned long flags;
+	struct slgt_info *info = container_of(port, struct slgt_info, port);
+
+	spin_lock_irqsave(&info->lock,flags);
+	info->signals |= SerialSignal_RTS + SerialSignal_DTR;
+ 	set_signals(info);
+	spin_unlock_irqrestore(&info->lock,flags);
+}
+
+
 /*
  *  block current process until the device is ready to open
  */
@@ -3143,12 +3119,14 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	bool		do_clocal = false;
 	bool		extra_count = false;
 	unsigned long	flags;
+	int		cd;
+	struct tty_port *port = &info->port;
 
 	DBGINFO(("%s block_til_ready\n", tty->driver->name));
 
 	if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
 		/* nonblock mode is set or port is not enabled */
-		info->port.flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 
@@ -3157,46 +3135,38 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 
 	/* Wait for carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, info->port.count is dropped by one, so that
+	 * this loop, port->count is dropped by one, so that
 	 * close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 
 	retval = 0;
-	add_wait_queue(&info->port.open_wait, &wait);
+	add_wait_queue(&port->open_wait, &wait);
 
 	spin_lock_irqsave(&info->lock, flags);
 	if (!tty_hung_up_p(filp)) {
 		extra_count = true;
-		info->port.count--;
+		port->count--;
 	}
 	spin_unlock_irqrestore(&info->lock, flags);
-	info->port.blocked_open++;
+	port->blocked_open++;
 
 	while (1) {
-		if ((tty->termios->c_cflag & CBAUD)) {
-			spin_lock_irqsave(&info->lock,flags);
-			info->signals |= SerialSignal_RTS + SerialSignal_DTR;
-		 	set_signals(info);
-			spin_unlock_irqrestore(&info->lock,flags);
-		}
+		if ((tty->termios->c_cflag & CBAUD))
+			tty_port_raise_dtr_rts(port);
 
 		set_current_state(TASK_INTERRUPTIBLE);
 
-		if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){
-			retval = (info->port.flags & ASYNC_HUP_NOTIFY) ?
+		if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
+			retval = (port->flags & ASYNC_HUP_NOTIFY) ?
 					-EAGAIN : -ERESTARTSYS;
 			break;
 		}
 
-		spin_lock_irqsave(&info->lock,flags);
-	 	get_signals(info);
-		spin_unlock_irqrestore(&info->lock,flags);
+		cd = tty_port_carrier_raised(port);
 
- 		if (!(info->port.flags & ASYNC_CLOSING) &&
- 		    (do_clocal || (info->signals & SerialSignal_DCD)) ) {
+ 		if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd ))
  			break;
-		}
 
 		if (signal_pending(current)) {
 			retval = -ERESTARTSYS;
@@ -3208,14 +3178,14 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	}
 
 	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->port.open_wait, &wait);
+	remove_wait_queue(&port->open_wait, &wait);
 
 	if (extra_count)
-		info->port.count++;
-	info->port.blocked_open--;
+		port->count++;
+	port->blocked_open--;
 
 	if (!retval)
-		info->port.flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 
 	DBGINFO(("%s block_til_ready ready, rc=%d\n", tty->driver->name, retval));
 	return retval;
@@ -3444,6 +3414,11 @@ static void add_device(struct slgt_info *info)
 #endif
 }
 
+static const struct tty_port_operations slgt_port_ops = {
+	.carrier_raised = carrier_raised,
+	.raise_dtr_rts = raise_dtr_rts,
+};
+
 /*
  *  allocate device instance structure, return NULL on failure
  */
@@ -3458,6 +3433,7 @@ static struct slgt_info *alloc_dev(int adapter_num, int port_num, struct pci_dev
 			driver_name, adapter_num, port_num));
 	} else {
 		tty_port_init(&info->port);
+		info->port.ops = &slgt_port_ops;
 		info->magic = MGSL_MAGIC;
 		INIT_WORK(&info->task, bh_handler);
 		info->max_frame_size = 4096;
diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c
index 6bdb44f7bec2..7b0c5b2dd263 100644
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -558,6 +558,7 @@ static void release_resources(SLMP_INFO *info);
 
 static int  startup(SLMP_INFO *info);
 static int  block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
+static int carrier_raised(struct tty_port *port);
 static void shutdown(SLMP_INFO *info);
 static void program_hw(SLMP_INFO *info);
 static void change_params(SLMP_INFO *info);
@@ -800,7 +801,7 @@ cleanup:
  */
 static void close(struct tty_struct *tty, struct file *filp)
 {
-	SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO * info = tty->driver_data;
 
 	if (sanity_check(info, tty->name, "close"))
 		return;
@@ -809,70 +810,18 @@ static void close(struct tty_struct *tty, struct file *filp)
 		printk("%s(%d):%s close() entry, count=%d\n",
 			 __FILE__,__LINE__, info->device_name, info->port.count);
 
-	if (!info->port.count)
-		return;
-
-	if (tty_hung_up_p(filp))
-		goto cleanup;
-
-	if ((tty->count == 1) && (info->port.count != 1)) {
-		/*
-		 * tty->count is 1 and the tty structure will be freed.
-		 * info->port.count should be one in this case.
-		 * if it's not, correct it so that the port is shutdown.
-		 */
-		printk("%s(%d):%s close: bad refcount; tty->count is 1, "
-		       "info->port.count is %d\n",
-			 __FILE__,__LINE__, info->device_name, info->port.count);
-		info->port.count = 1;
-	}
-
-	info->port.count--;
-
-	/* if at least one open remaining, leave hardware active */
-	if (info->port.count)
+	if (tty_port_close_start(&info->port, tty, filp) == 0)
 		goto cleanup;
-
-	info->port.flags |= ASYNC_CLOSING;
-
-	/* set tty->closing to notify line discipline to
-	 * only process XON/XOFF characters. Only the N_TTY
-	 * discipline appears to use this (ppp does not).
-	 */
-	tty->closing = 1;
-
-	/* wait for transmit data to clear all layers */
-
-	if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) {
-		if (debug_level >= DEBUG_LEVEL_INFO)
-			printk("%s(%d):%s close() calling tty_wait_until_sent\n",
-				 __FILE__,__LINE__, info->device_name );
-		tty_wait_until_sent(tty, info->port.closing_wait);
-	}
-
+		
  	if (info->port.flags & ASYNC_INITIALIZED)
  		wait_until_sent(tty, info->timeout);
 
 	flush_buffer(tty);
-
 	tty_ldisc_flush(tty);
-
 	shutdown(info);
 
-	tty->closing = 0;
+	tty_port_close_end(&info->port, tty);
 	info->port.tty = NULL;
-
-	if (info->port.blocked_open) {
-		if (info->port.close_delay) {
-			msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
-		}
-		wake_up_interruptible(&info->port.open_wait);
-	}
-
-	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-
-	wake_up_interruptible(&info->port.close_wait);
-
 cleanup:
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
@@ -884,7 +833,7 @@ cleanup:
  */
 static void hangup(struct tty_struct *tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):%s hangup()\n",
@@ -907,7 +856,7 @@ static void hangup(struct tty_struct *tty)
  */
 static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -960,7 +909,7 @@ static int write(struct tty_struct *tty,
 		 const unsigned char *buf, int count)
 {
 	int	c, ret = 0;
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1038,7 +987,7 @@ cleanup:
  */
 static int put_char(struct tty_struct *tty, unsigned char ch)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 	int ret = 0;
 
@@ -1075,7 +1024,7 @@ static int put_char(struct tty_struct *tty, unsigned char ch)
  */
 static void send_xchar(struct tty_struct *tty, char ch)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1099,7 +1048,7 @@ static void send_xchar(struct tty_struct *tty, char ch)
  */
 static void wait_until_sent(struct tty_struct *tty, int timeout)
 {
-	SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO * info = tty->driver_data;
 	unsigned long orig_jiffies, char_time;
 
 	if (!info )
@@ -1166,7 +1115,7 @@ exit:
  */
 static int write_room(struct tty_struct *tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	int ret;
 
 	if (sanity_check(info, tty->name, "write_room"))
@@ -1193,7 +1142,7 @@ static int write_room(struct tty_struct *tty)
  */
 static void flush_chars(struct tty_struct *tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if ( debug_level >= DEBUG_LEVEL_INFO )
@@ -1232,7 +1181,7 @@ static void flush_chars(struct tty_struct *tty)
  */
 static void flush_buffer(struct tty_struct *tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1254,7 +1203,7 @@ static void flush_buffer(struct tty_struct *tty)
  */
 static void tx_hold(struct tty_struct *tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if (sanity_check(info, tty->name, "tx_hold"))
@@ -1274,7 +1223,7 @@ static void tx_hold(struct tty_struct *tty)
  */
 static void tx_release(struct tty_struct *tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if (sanity_check(info, tty->name, "tx_release"))
@@ -1304,7 +1253,7 @@ static void tx_release(struct tty_struct *tty)
 static int do_ioctl(struct tty_struct *tty, struct file *file,
 		 unsigned int cmd, unsigned long arg)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	int error;
 	struct mgsl_icount cnow;	/* kernel counter temps */
 	struct serial_icounter_struct __user *p_cuser;	/* user space */
@@ -1515,7 +1464,7 @@ done:
  */
 static int chars_in_buffer(struct tty_struct *tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 
 	if (sanity_check(info, tty->name, "chars_in_buffer"))
 		return 0;
@@ -1531,7 +1480,7 @@ static int chars_in_buffer(struct tty_struct *tty)
  */
 static void throttle(struct tty_struct * tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1556,7 +1505,7 @@ static void throttle(struct tty_struct * tty)
  */
 static void unthrottle(struct tty_struct * tty)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1587,7 +1536,7 @@ static void unthrottle(struct tty_struct * tty)
 static int set_break(struct tty_struct *tty, int break_state)
 {
 	unsigned char RegValue;
-	SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO * info = tty->driver_data;
 	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -3269,7 +3218,7 @@ static int modem_input_wait(SLMP_INFO *info,int arg)
  */
 static int tiocmget(struct tty_struct *tty, struct file *file)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
 	unsigned int result;
  	unsigned long flags;
 
@@ -3295,7 +3244,7 @@ static int tiocmget(struct tty_struct *tty, struct file *file)
 static int tiocmset(struct tty_struct *tty, struct file *file,
 		    unsigned int set, unsigned int clear)
 {
-	SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
+	SLMP_INFO *info = tty->driver_data;
  	unsigned long flags;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
@@ -3318,7 +3267,28 @@ static int tiocmset(struct tty_struct *tty, struct file *file,
 	return 0;
 }
 
+static int carrier_raised(struct tty_port *port)
+{
+	SLMP_INFO *info = container_of(port, SLMP_INFO, port);
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->lock,flags);
+ 	get_signals(info);
+	spin_unlock_irqrestore(&info->lock,flags);
 
+	return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
+}
+
+static void raise_dtr_rts(struct tty_port *port)
+{
+	SLMP_INFO *info = container_of(port, SLMP_INFO, port);
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->lock,flags);
+	info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ 	set_signals(info);
+	spin_unlock_irqrestore(&info->lock,flags);
+}
 
 /* Block the current process until the specified port is ready to open.
  */
@@ -3330,6 +3300,8 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	bool		do_clocal = false;
 	bool		extra_count = false;
 	unsigned long	flags;
+	int		cd;
+	struct tty_port *port = &info->port;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):%s block_til_ready()\n",
@@ -3338,7 +3310,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
 		/* nonblock mode is set or port is not enabled */
 		/* just verify that callout device is not active */
-		info->port.flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 
@@ -3347,50 +3319,42 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 
 	/* Wait for carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, info->port.count is dropped by one, so that
+	 * this loop, port->count is dropped by one, so that
 	 * close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 
 	retval = 0;
-	add_wait_queue(&info->port.open_wait, &wait);
+	add_wait_queue(&port->open_wait, &wait);
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):%s block_til_ready() before block, count=%d\n",
-			 __FILE__,__LINE__, tty->driver->name, info->port.count );
+			 __FILE__,__LINE__, tty->driver->name, port->count );
 
 	spin_lock_irqsave(&info->lock, flags);
 	if (!tty_hung_up_p(filp)) {
 		extra_count = true;
-		info->port.count--;
+		port->count--;
 	}
 	spin_unlock_irqrestore(&info->lock, flags);
-	info->port.blocked_open++;
+	port->blocked_open++;
 
 	while (1) {
-		if ((tty->termios->c_cflag & CBAUD)) {
-			spin_lock_irqsave(&info->lock,flags);
-			info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
-		 	set_signals(info);
-			spin_unlock_irqrestore(&info->lock,flags);
-		}
+		if (tty->termios->c_cflag & CBAUD)
+			tty_port_raise_dtr_rts(port);
 
 		set_current_state(TASK_INTERRUPTIBLE);
 
-		if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){
-			retval = (info->port.flags & ASYNC_HUP_NOTIFY) ?
+		if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
+			retval = (port->flags & ASYNC_HUP_NOTIFY) ?
 					-EAGAIN : -ERESTARTSYS;
 			break;
 		}
 
-		spin_lock_irqsave(&info->lock,flags);
-	 	get_signals(info);
-		spin_unlock_irqrestore(&info->lock,flags);
+		cd = tty_port_carrier_raised(port);
 
- 		if (!(info->port.flags & ASYNC_CLOSING) &&
- 		    (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
+ 		if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd))
  			break;
-		}
 
 		if (signal_pending(current)) {
 			retval = -ERESTARTSYS;
@@ -3399,24 +3363,24 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 
 		if (debug_level >= DEBUG_LEVEL_INFO)
 			printk("%s(%d):%s block_til_ready() count=%d\n",
-				 __FILE__,__LINE__, tty->driver->name, info->port.count );
+				 __FILE__,__LINE__, tty->driver->name, port->count );
 
 		schedule();
 	}
 
 	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->port.open_wait, &wait);
+	remove_wait_queue(&port->open_wait, &wait);
 
 	if (extra_count)
-		info->port.count++;
-	info->port.blocked_open--;
+		port->count++;
+	port->blocked_open--;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):%s block_til_ready() after, count=%d\n",
-			 __FILE__,__LINE__, tty->driver->name, info->port.count );
+			 __FILE__,__LINE__, tty->driver->name, port->count );
 
 	if (!retval)
-		info->port.flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 
 	return retval;
 }
@@ -3782,6 +3746,11 @@ static void add_device(SLMP_INFO *info)
 #endif
 }
 
+static const struct tty_port_operations port_ops = {
+	.carrier_raised = carrier_raised,
+	.raise_dtr_rts = raise_dtr_rts,
+};
+
 /* Allocate and initialize a device instance structure
  *
  * Return Value:	pointer to SLMP_INFO if success, otherwise NULL
@@ -3798,6 +3767,7 @@ static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
 			__FILE__,__LINE__, adapter_num, port_num);
 	} else {
 		tty_port_init(&info->port);
+		info->port.ops = &port_ops;
 		info->magic = MGSL_MAGIC;
 		INIT_WORK(&info->task, bh_handler);
 		info->max_frame_size = 4096;
@@ -3940,6 +3910,7 @@ static const struct tty_operations ops = {
 	.tiocmset = tiocmset,
 };
 
+
 static void synclinkmp_cleanup(void)
 {
 	int rc;
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 9bcf0c9848b1..5a3eab0882a0 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -83,7 +83,7 @@ static void sysrq_handle_loglevel(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_loglevel_op = {
 	.handler	= sysrq_handle_loglevel,
-	.help_msg	= "loglevel0-8",
+	.help_msg	= "loglevel(0-9)",
 	.action_msg	= "Changing Loglevel",
 	.enable_mask	= SYSRQ_ENABLE_LOG,
 };
@@ -234,7 +234,7 @@ static void sysrq_handle_showallcpus(int key, struct tty_struct *tty)
 
 static struct sysrq_key_op sysrq_showallcpus_op = {
 	.handler	= sysrq_handle_showallcpus,
-	.help_msg	= "aLlcpus",
+	.help_msg	= "show-backtrace-all-active-cpus(L)",
 	.action_msg	= "Show backtrace of all active CPUs",
 	.enable_mask	= SYSRQ_ENABLE_DUMP,
 };
@@ -249,7 +249,7 @@ static void sysrq_handle_showregs(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_showregs_op = {
 	.handler	= sysrq_handle_showregs,
-	.help_msg	= "showPc",
+	.help_msg	= "show-registers(P)",
 	.action_msg	= "Show Regs",
 	.enable_mask	= SYSRQ_ENABLE_DUMP,
 };
@@ -260,7 +260,7 @@ static void sysrq_handle_showstate(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_showstate_op = {
 	.handler	= sysrq_handle_showstate,
-	.help_msg	= "showTasks",
+	.help_msg	= "show-task-states(T)",
 	.action_msg	= "Show State",
 	.enable_mask	= SYSRQ_ENABLE_DUMP,
 };
@@ -271,7 +271,7 @@ static void sysrq_handle_showstate_blocked(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_showstate_blocked_op = {
 	.handler	= sysrq_handle_showstate_blocked,
-	.help_msg	= "shoW-blocked-tasks",
+	.help_msg	= "show-blocked-tasks(W)",
 	.action_msg	= "Show Blocked State",
 	.enable_mask	= SYSRQ_ENABLE_DUMP,
 };
@@ -299,7 +299,7 @@ static void sysrq_handle_showmem(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_showmem_op = {
 	.handler	= sysrq_handle_showmem,
-	.help_msg	= "showMem",
+	.help_msg	= "show-memory-usage(M)",
 	.action_msg	= "Show Memory",
 	.enable_mask	= SYSRQ_ENABLE_DUMP,
 };
@@ -325,7 +325,7 @@ static void sysrq_handle_term(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_term_op = {
 	.handler	= sysrq_handle_term,
-	.help_msg	= "tErm",
+	.help_msg	= "terminate-all-tasks(E)",
 	.action_msg	= "Terminate All Tasks",
 	.enable_mask	= SYSRQ_ENABLE_SIGNAL,
 };
@@ -343,7 +343,7 @@ static void sysrq_handle_moom(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_moom_op = {
 	.handler	= sysrq_handle_moom,
-	.help_msg	= "Full",
+	.help_msg	= "memory-full-oom-kill(F)",
 	.action_msg	= "Manual OOM execution",
 	.enable_mask	= SYSRQ_ENABLE_SIGNAL,
 };
@@ -355,7 +355,7 @@ static void sysrq_handle_kill(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_kill_op = {
 	.handler	= sysrq_handle_kill,
-	.help_msg	= "kIll",
+	.help_msg	= "kill-all-tasks(I)",
 	.action_msg	= "Kill All Tasks",
 	.enable_mask	= SYSRQ_ENABLE_SIGNAL,
 };
@@ -366,7 +366,7 @@ static void sysrq_handle_unrt(int key, struct tty_struct *tty)
 }
 static struct sysrq_key_op sysrq_unrt_op = {
 	.handler	= sysrq_handle_unrt,
-	.help_msg	= "Nice",
+	.help_msg	= "nice-all-RT-tasks(N)",
 	.action_msg	= "Nice All RT Tasks",
 	.enable_mask	= SYSRQ_ENABLE_RTNICE,
 };
diff --git a/drivers/char/tpm/tpm_bios.c b/drivers/char/tpm/tpm_bios.c
index 68f052b42ed7..ed306eb1057f 100644
--- a/drivers/char/tpm/tpm_bios.c
+++ b/drivers/char/tpm/tpm_bios.c
@@ -23,8 +23,6 @@
 #include <linux/security.h>
 #include <linux/module.h>
 #include <acpi/acpi.h>
-#include <acpi/actypes.h>
-#include <acpi/actbl.h>
 #include "tpm.h"
 
 #define TCG_EVENT_NAME_LEN_MAX	255
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
index ab18c1e7b115..70efba2ee053 100644
--- a/drivers/char/tpm/tpm_nsc.c
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -273,12 +273,23 @@ static void tpm_nsc_remove(struct device *dev)
 	}
 }
 
-static struct device_driver nsc_drv = {
-	.name = "tpm_nsc",
-	.bus = &platform_bus_type,
-	.owner = THIS_MODULE,
-	.suspend = tpm_pm_suspend,
-	.resume = tpm_pm_resume,
+static int tpm_nsc_suspend(struct platform_device *dev, pm_message_t msg)
+{
+	return tpm_pm_suspend(&dev->dev, msg);
+}
+
+static int tpm_nsc_resume(struct platform_device *dev)
+{
+	return tpm_pm_resume(&dev->dev);
+}
+
+static struct platform_driver nsc_drv = {
+	.suspend         = tpm_nsc_suspend,
+	.resume          = tpm_nsc_resume,
+	.driver          = {
+		.name    = "tpm_nsc",
+		.owner   = THIS_MODULE,
+	},
 };
 
 static int __init init_nsc(void)
@@ -297,7 +308,7 @@ static int __init init_nsc(void)
 			return -ENODEV;
 	}
 
-	err = driver_register(&nsc_drv);
+	err = platform_driver_register(&nsc_drv);
 	if (err)
 		return err;
 
@@ -308,17 +319,15 @@ static int __init init_nsc(void)
 	/* enable the DPM module */
 	tpm_write_index(nscAddrBase, NSC_LDC_INDEX, 0x01);
 
-	pdev = kzalloc(sizeof(struct platform_device), GFP_KERNEL);
+	pdev = platform_device_alloc("tpm_nscl0", -1);
 	if (!pdev) {
 		rc = -ENOMEM;
 		goto err_unreg_drv;
 	}
 
-	pdev->name = "tpm_nscl0";
-	pdev->id = -1;
 	pdev->num_resources = 0;
+	pdev->dev.driver = &nsc_drv.driver;
 	pdev->dev.release = tpm_nsc_remove;
-	pdev->dev.driver = &nsc_drv;
 
 	if ((rc = platform_device_register(pdev)) < 0)
 		goto err_free_dev;
@@ -377,7 +386,7 @@ err_unreg_dev:
 err_free_dev:
 	kfree(pdev);
 err_unreg_drv:
-	driver_unregister(&nsc_drv);
+	platform_driver_unregister(&nsc_drv);
 	return rc;
 }
 
@@ -390,7 +399,7 @@ static void __exit cleanup_nsc(void)
 		pdev = NULL;
 	}
 
-	driver_unregister(&nsc_drv);
+	platform_driver_unregister(&nsc_drv);
 }
 
 module_init(init_nsc);
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index db15f9ba7c0b..d33e5ab06177 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1111,9 +1111,7 @@ void tty_write_message(struct tty_struct *tty, char *msg)
  *		Locks the line discipline as required
  *		Writes to the tty driver are serialized by the atomic_write_lock
  *	and are then processed in chunks to the device. The line discipline
- *	write method will not be involked in parallel for each device
- *		The line discipline write method is called under the big
- *	kernel lock for historical reasons. New code should not rely on this.
+ *	write method will not be invoked in parallel for each device.
  */
 
 static ssize_t tty_write(struct file *file, const char __user *buf,
@@ -1213,7 +1211,7 @@ static void tty_line_name(struct tty_driver *driver, int index, char *p)
  *	be held until the 'fast-open' is also done. Will change once we
  *	have refcounting in the driver and per driver locking
  */
-struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,
+static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,
 		struct inode *inode, int idx)
 {
 	struct tty_struct *tty;
@@ -2050,7 +2048,6 @@ static int tiocgwinsz(struct tty_struct *tty, struct winsize __user *arg)
 /**
  *	tty_do_resize		-	resize event
  *	@tty: tty being resized
- *	@real_tty: real tty (not the same as tty if using a pty/tty pair)
  *	@rows: rows (character)
  *	@cols: cols (character)
  *
@@ -2058,41 +2055,34 @@ static int tiocgwinsz(struct tty_struct *tty, struct winsize __user *arg)
  *	peform a terminal resize correctly
  */
 
-int tty_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
-					struct winsize *ws)
+int tty_do_resize(struct tty_struct *tty, struct winsize *ws)
 {
-	struct pid *pgrp, *rpgrp;
+	struct pid *pgrp;
 	unsigned long flags;
 
-	/* For a PTY we need to lock the tty side */
-	mutex_lock(&real_tty->termios_mutex);
-	if (!memcmp(ws, &real_tty->winsize, sizeof(*ws)))
+	/* Lock the tty */
+	mutex_lock(&tty->termios_mutex);
+	if (!memcmp(ws, &tty->winsize, sizeof(*ws)))
 		goto done;
 	/* Get the PID values and reference them so we can
 	   avoid holding the tty ctrl lock while sending signals */
 	spin_lock_irqsave(&tty->ctrl_lock, flags);
 	pgrp = get_pid(tty->pgrp);
-	rpgrp = get_pid(real_tty->pgrp);
 	spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 
 	if (pgrp)
 		kill_pgrp(pgrp, SIGWINCH, 1);
-	if (rpgrp != pgrp && rpgrp)
-		kill_pgrp(rpgrp, SIGWINCH, 1);
-
 	put_pid(pgrp);
-	put_pid(rpgrp);
 
 	tty->winsize = *ws;
-	real_tty->winsize = *ws;
 done:
-	mutex_unlock(&real_tty->termios_mutex);
+	mutex_unlock(&tty->termios_mutex);
 	return 0;
 }
 
 /**
  *	tiocswinsz		-	implement window size set ioctl
- *	@tty; tty
+ *	@tty; tty side of tty
  *	@arg: user buffer for result
  *
  *	Copies the user idea of the window size to the kernel. Traditionally
@@ -2105,17 +2095,16 @@ done:
  *	then calls into the default method.
  */
 
-static int tiocswinsz(struct tty_struct *tty, struct tty_struct *real_tty,
-	struct winsize __user *arg)
+static int tiocswinsz(struct tty_struct *tty, struct winsize __user *arg)
 {
 	struct winsize tmp_ws;
 	if (copy_from_user(&tmp_ws, arg, sizeof(*arg)))
 		return -EFAULT;
 
 	if (tty->ops->resize)
-		return tty->ops->resize(tty, real_tty, &tmp_ws);
+		return tty->ops->resize(tty, &tmp_ws);
 	else
-		return tty_do_resize(tty, real_tty, &tmp_ws);
+		return tty_do_resize(tty, &tmp_ws);
 }
 
 /**
@@ -2540,7 +2529,7 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	case TIOCGWINSZ:
 		return tiocgwinsz(real_tty, p);
 	case TIOCSWINSZ:
-		return tiocswinsz(tty, real_tty, p);
+		return tiocswinsz(real_tty, p);
 	case TIOCCONS:
 		return real_tty != tty ? -EINVAL : tioccons(file);
 	case FIONBIO:
@@ -2785,6 +2774,8 @@ void initialize_tty_struct(struct tty_struct *tty,
 	INIT_WORK(&tty->hangup_work, do_tty_hangup);
 	mutex_init(&tty->atomic_read_lock);
 	mutex_init(&tty->atomic_write_lock);
+	mutex_init(&tty->output_lock);
+	mutex_init(&tty->echo_lock);
 	spin_lock_init(&tty->read_lock);
 	spin_lock_init(&tty->ctrl_lock);
 	INIT_LIST_HEAD(&tty->tty_files);
diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c
index f307f135cbfb..7a84b406a952 100644
--- a/drivers/char/tty_ldisc.c
+++ b/drivers/char/tty_ldisc.c
@@ -316,8 +316,7 @@ struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *tty)
 {
 	/* wait_event is a macro */
 	wait_event(tty_ldisc_wait, tty_ldisc_try(tty));
-	if (tty->ldisc.refcount == 0)
-		printk(KERN_ERR "tty_ldisc_ref_wait\n");
+	WARN_ON(tty->ldisc.refcount == 0);
 	return &tty->ldisc;
 }
 
@@ -376,15 +375,17 @@ EXPORT_SYMBOL_GPL(tty_ldisc_deref);
  *	@tty: terminal to activate ldisc on
  *
  *	Set the TTY_LDISC flag when the line discipline can be called
- *	again. Do necessary wakeups for existing sleepers.
+ *	again. Do necessary wakeups for existing sleepers. Clear the LDISC
+ *	changing flag to indicate any ldisc change is now over.
  *
- *	Note: nobody should set this bit except via this function. Clearing
- *	directly is allowed.
+ *	Note: nobody should set the TTY_LDISC bit except via this function.
+ *	Clearing directly is allowed.
  */
 
 void tty_ldisc_enable(struct tty_struct *tty)
 {
 	set_bit(TTY_LDISC, &tty->flags);
+	clear_bit(TTY_LDISC_CHANGING, &tty->flags);
 	wake_up(&tty_ldisc_wait);
 }
 
@@ -496,7 +497,14 @@ restart:
 	 *	reference to the line discipline. The TTY_LDISC bit
 	 *	prevents anyone taking a reference once it is clear.
 	 *	We need the lock to avoid racing reference takers.
+	 *
+	 *	We must clear the TTY_LDISC bit here to avoid a livelock
+	 *	with a userspace app continually trying to use the tty in
+	 *	parallel to the change and re-referencing the tty.
 	 */
+	clear_bit(TTY_LDISC, &tty->flags);
+	if (o_tty)
+		clear_bit(TTY_LDISC, &o_tty->flags);
 
 	spin_lock_irqsave(&tty_ldisc_lock, flags);
 	if (tty->ldisc.refcount || (o_tty && o_tty->ldisc.refcount)) {
@@ -528,7 +536,7 @@ restart:
 	 *	If the TTY_LDISC bit is set, then we are racing against
 	 *	another ldisc change
 	 */
-	if (!test_bit(TTY_LDISC, &tty->flags)) {
+	if (test_bit(TTY_LDISC_CHANGING, &tty->flags)) {
 		struct tty_ldisc *ld;
 		spin_unlock_irqrestore(&tty_ldisc_lock, flags);
 		tty_ldisc_put(new_ldisc.ops);
@@ -536,10 +544,14 @@ restart:
 		tty_ldisc_deref(ld);
 		goto restart;
 	}
-
-	clear_bit(TTY_LDISC, &tty->flags);
+	/*
+	 *	This flag is used to avoid two parallel ldisc changes. Once
+	 *	open and close are fine grained locked this may work better
+	 *	as a mutex shared with the open/close/hup paths
+	 */
+	set_bit(TTY_LDISC_CHANGING, &tty->flags);
 	if (o_tty)
-		clear_bit(TTY_LDISC, &o_tty->flags);
+		set_bit(TTY_LDISC_CHANGING, &o_tty->flags);
 	spin_unlock_irqrestore(&tty_ldisc_lock, flags);
 	
 	/*
diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
index c8f8024cb40e..9b8004c72686 100644
--- a/drivers/char/tty_port.c
+++ b/drivers/char/tty_port.c
@@ -7,6 +7,7 @@
 #include <linux/tty.h>
 #include <linux/tty_driver.h>
 #include <linux/tty_flip.h>
+#include <linux/serial.h>
 #include <linux/timer.h>
 #include <linux/string.h>
 #include <linux/slab.h>
@@ -94,3 +95,227 @@ void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty)
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 EXPORT_SYMBOL(tty_port_tty_set);
+
+/**
+ *	tty_port_hangup		-	hangup helper
+ *	@port: tty port
+ *
+ *	Perform port level tty hangup flag and count changes. Drop the tty
+ *	reference.
+ */
+
+void tty_port_hangup(struct tty_port *port)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&port->lock, flags);
+	port->count = 0;
+	port->flags &= ~ASYNC_NORMAL_ACTIVE;
+	if (port->tty)
+		tty_kref_put(port->tty);
+	port->tty = NULL;
+	spin_unlock_irqrestore(&port->lock, flags);
+	wake_up_interruptible(&port->open_wait);
+}
+EXPORT_SYMBOL(tty_port_hangup);
+
+/**
+ *	tty_port_carrier_raised	-	carrier raised check
+ *	@port: tty port
+ *
+ *	Wrapper for the carrier detect logic. For the moment this is used
+ *	to hide some internal details. This will eventually become entirely
+ *	internal to the tty port.
+ */
+
+int tty_port_carrier_raised(struct tty_port *port)
+{
+	if (port->ops->carrier_raised == NULL)
+		return 1;
+	return port->ops->carrier_raised(port);
+}
+EXPORT_SYMBOL(tty_port_carrier_raised);
+
+/**
+ *	tty_port_raise_dtr_rts	-	Riase DTR/RTS
+ *	@port: tty port
+ *
+ *	Wrapper for the DTR/RTS raise logic. For the moment this is used
+ *	to hide some internal details. This will eventually become entirely
+ *	internal to the tty port.
+ */
+
+void tty_port_raise_dtr_rts(struct tty_port *port)
+{
+	if (port->ops->raise_dtr_rts)
+		port->ops->raise_dtr_rts(port);
+}
+EXPORT_SYMBOL(tty_port_raise_dtr_rts);
+
+/**
+ *	tty_port_block_til_ready	-	Waiting logic for tty open
+ *	@port: the tty port being opened
+ *	@tty: the tty device being bound
+ *	@filp: the file pointer of the opener
+ *
+ *	Implement the core POSIX/SuS tty behaviour when opening a tty device.
+ *	Handles:
+ *		- hangup (both before and during)
+ *		- non blocking open
+ *		- rts/dtr/dcd
+ *		- signals
+ *		- port flags and counts
+ *
+ *	The passed tty_port must implement the carrier_raised method if it can
+ *	do carrier detect and the raise_dtr_rts method if it supports software
+ *	management of these lines. Note that the dtr/rts raise is done each
+ *	iteration as a hangup may have previously dropped them while we wait.
+ */
+ 
+int tty_port_block_til_ready(struct tty_port *port,
+				struct tty_struct *tty, struct file *filp)
+{
+	int do_clocal = 0, retval;
+	unsigned long flags;
+	DECLARE_WAITQUEUE(wait, current);
+	int cd;
+
+	/* block if port is in the process of being closed */
+	if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
+		interruptible_sleep_on(&port->close_wait);
+		if (port->flags & ASYNC_HUP_NOTIFY)
+			return -EAGAIN;
+		else
+			return -ERESTARTSYS;
+	}
+
+	/* if non-blocking mode is set we can pass directly to open unless
+	   the port has just hung up or is in another error state */
+	if ((filp->f_flags & O_NONBLOCK) ||
+			(tty->flags & (1 << TTY_IO_ERROR))) {
+		port->flags |= ASYNC_NORMAL_ACTIVE;
+		return 0;
+	}
+
+	if (C_CLOCAL(tty))
+		do_clocal = 1;
+
+	/* Block waiting until we can proceed. We may need to wait for the
+	   carrier, but we must also wait for any close that is in progress
+	   before the next open may complete */
+
+	retval = 0;
+	add_wait_queue(&port->open_wait, &wait);
+
+	/* The port lock protects the port counts */
+	spin_lock_irqsave(&port->lock, flags);
+	if (!tty_hung_up_p(filp))
+		port->count--;
+	port->blocked_open++;
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	while (1) {
+		/* Indicate we are open */
+		if (tty->termios->c_cflag & CBAUD)
+			tty_port_raise_dtr_rts(port);
+
+		set_current_state(TASK_INTERRUPTIBLE);
+		/* Check for a hangup or uninitialised port. Return accordingly */
+		if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
+			if (port->flags & ASYNC_HUP_NOTIFY)
+				retval = -EAGAIN;
+			else
+				retval = -ERESTARTSYS;
+			break;
+		}
+		/* Probe the carrier. For devices with no carrier detect this
+		   will always return true */
+		cd = tty_port_carrier_raised(port);
+		if (!(port->flags & ASYNC_CLOSING) &&
+				(do_clocal || cd))
+			break;
+		if (signal_pending(current)) {
+			retval = -ERESTARTSYS;
+			break;
+		}
+		schedule();
+	}
+	set_current_state(TASK_RUNNING);
+	remove_wait_queue(&port->open_wait, &wait);
+
+	/* Update counts. A parallel hangup will have set count to zero and
+	   we must not mess that up further */
+	spin_lock_irqsave(&port->lock, flags);
+	if (!tty_hung_up_p(filp))
+		port->count++;
+	port->blocked_open--;
+	if (retval == 0)
+		port->flags |= ASYNC_NORMAL_ACTIVE;
+	spin_unlock_irqrestore(&port->lock, flags);
+	return 0;
+	
+}
+EXPORT_SYMBOL(tty_port_block_til_ready);
+
+int tty_port_close_start(struct tty_port *port, struct tty_struct *tty, struct file *filp)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&port->lock, flags);
+	if (tty_hung_up_p(filp)) {
+		spin_unlock_irqrestore(&port->lock, flags);
+		return 0;
+	}
+
+	if( tty->count == 1 && port->count != 1) {
+		printk(KERN_WARNING
+		    "tty_port_close_start: tty->count = 1 port count = %d.\n",
+								port->count);
+		port->count = 1;
+	}
+	if (--port->count < 0) {
+		printk(KERN_WARNING "tty_port_close_start: count = %d\n",
+								port->count);
+		port->count = 0;
+	}
+
+	if (port->count) {
+		spin_unlock_irqrestore(&port->lock, flags);
+		return 0;
+	}
+	port->flags |= ASYNC_CLOSING;
+	tty->closing = 1;
+	spin_unlock_irqrestore(&port->lock, flags);
+	/* Don't block on a stalled port, just pull the chain */
+	if (tty->flow_stopped)
+		tty_driver_flush_buffer(tty);
+	if (port->flags & ASYNC_INITIALIZED &&
+			port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+		tty_wait_until_sent(tty, port->closing_wait);
+	return 1;
+}
+EXPORT_SYMBOL(tty_port_close_start);
+
+void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
+{
+	unsigned long flags;
+
+	tty_ldisc_flush(tty);
+
+	spin_lock_irqsave(&port->lock, flags);
+	tty->closing = 0;
+
+	if (port->blocked_open) {
+		spin_unlock_irqrestore(&port->lock, flags);
+		if (port->close_delay) {
+			msleep_interruptible(
+				jiffies_to_msecs(port->close_delay));
+		}
+		spin_lock_irqsave(&port->lock, flags);
+		wake_up_interruptible(&port->open_wait);
+	}
+	port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+	wake_up_interruptible(&port->close_wait);
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+EXPORT_SYMBOL(tty_port_close_end);
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 3fb0d2c88ba5..ff6f5a4b58fb 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -138,12 +138,33 @@ int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int))
 }
 
 /*
+ * virtio console configuration. This supports:
+ * - console resize
+ */
+static void virtcons_apply_config(struct virtio_device *dev)
+{
+	struct winsize ws;
+
+	if (virtio_has_feature(dev, VIRTIO_CONSOLE_F_SIZE)) {
+		dev->config->get(dev,
+				 offsetof(struct virtio_console_config, cols),
+				 &ws.ws_col, sizeof(u16));
+		dev->config->get(dev,
+				 offsetof(struct virtio_console_config, rows),
+				 &ws.ws_row, sizeof(u16));
+		hvc_resize(hvc, ws);
+	}
+}
+
+/*
  * we support only one console, the hvc struct is a global var
- * There is no need to do anything
+ * We set the configuration at this point, since we now have a tty
  */
 static int notifier_add_vio(struct hvc_struct *hp, int data)
 {
 	hp->irq_requested = 1;
+	virtcons_apply_config(vdev);
+
 	return 0;
 }
 
@@ -234,11 +255,18 @@ static struct virtio_device_id id_table[] = {
 	{ 0 },
 };
 
+static unsigned int features[] = {
+	VIRTIO_CONSOLE_F_SIZE,
+};
+
 static struct virtio_driver virtio_console = {
+	.feature_table = features,
+	.feature_table_size = ARRAY_SIZE(features),
 	.driver.name =	KBUILD_MODNAME,
 	.driver.owner =	THIS_MODULE,
 	.id_table =	id_table,
 	.probe =	virtcons_probe,
+	.config_changed = virtcons_apply_config,
 };
 
 static int __init init(void)
diff --git a/drivers/char/vme_scc.c b/drivers/char/vme_scc.c
index 1718b3c481db..0e8234bd0e19 100644
--- a/drivers/char/vme_scc.c
+++ b/drivers/char/vme_scc.c
@@ -69,7 +69,7 @@ static void scc_disable_tx_interrupts(void * ptr);
 static void scc_enable_tx_interrupts(void * ptr);
 static void scc_disable_rx_interrupts(void * ptr);
 static void scc_enable_rx_interrupts(void * ptr);
-static int  scc_get_CD(void * ptr);
+static int  scc_carrier_raised(struct tty_port *port);
 static void scc_shutdown_port(void * ptr);
 static int scc_set_real_termios(void  *ptr);
 static void scc_hungup(void  *ptr);
@@ -100,7 +100,6 @@ static struct real_driver scc_real_driver = {
         scc_enable_tx_interrupts,
         scc_disable_rx_interrupts,
         scc_enable_rx_interrupts,
-        scc_get_CD,
         scc_shutdown_port,
         scc_set_real_termios,
         scc_chars_in_buffer,
@@ -129,6 +128,10 @@ static const struct tty_operations scc_ops = {
 	.break_ctl = scc_break_ctl,
 };
 
+static const struct tty_port_operations scc_port_ops = {
+	.carrier_raised = scc_carrier_raised,
+};
+
 /*----------------------------------------------------------------------------
  * vme_scc_init() and support functions
  *---------------------------------------------------------------------------*/
@@ -176,6 +179,8 @@ static void scc_init_portstructs(void)
 
 	for (i = 0; i < 2; i++) {
 		port = scc_ports + i;
+		tty_port_init(&port->gs.port);
+		port->gs.port.ops = &scc_port_ops;
 		port->gs.magic = SCC_MAGIC;
 		port->gs.close_delay = HZ/2;
 		port->gs.closing_wait = 30 * HZ;
@@ -624,10 +629,10 @@ static void scc_enable_rx_interrupts(void *ptr)
 }
 
 
-static int scc_get_CD(void *ptr)
+static int scc_carrier_raised(struct tty_port *port)
 {
-	struct scc_port *port = ptr;
-	unsigned channel = port->channel;
+	struct scc_port *sc = container_of(port, struct scc_port, gs.port);
+	unsigned channel = sc->channel;
 
 	return !!(scc_last_status_reg[channel] & SR_DCD);
 }
@@ -638,7 +643,7 @@ static void scc_shutdown_port(void *ptr)
 	struct scc_port *port = ptr;
 
 	port->gs.port.flags &= ~ GS_ACTIVE;
-	if (port->gs.port.tty && port->gs.port.tty->termios->c_cflag & HUPCL) {
+	if (port->gs.port.tty && (port->gs.port.tty->termios->c_cflag & HUPCL)) {
 		scc_setsignals (port, 0, 0);
 	}
 }
@@ -779,7 +784,7 @@ static void scc_setsignals(struct scc_port *port, int dtr, int rts)
 
 static void scc_send_xchar(struct tty_struct *tty, char ch)
 {
-	struct scc_port *port = (struct scc_port *)tty->driver_data;
+	struct scc_port *port = tty->driver_data;
 
 	port->x_char = ch;
 	if (ch)
@@ -896,7 +901,7 @@ static int scc_open (struct tty_struct * tty, struct file * filp)
 		return retval;
 	}
 
-	port->c_dcd = scc_get_CD (port);
+	port->c_dcd = tty_port_carrier_raised(&port->gs.port);
 
 	scc_enable_rx_interrupts(port);
 
@@ -906,7 +911,7 @@ static int scc_open (struct tty_struct * tty, struct file * filp)
 
 static void scc_throttle (struct tty_struct * tty)
 {
-	struct scc_port *port = (struct scc_port *)tty->driver_data;
+	struct scc_port *port = tty->driver_data;
 	unsigned long	flags;
 	SCC_ACCESS_INIT(port);
 
@@ -922,7 +927,7 @@ static void scc_throttle (struct tty_struct * tty)
 
 static void scc_unthrottle (struct tty_struct * tty)
 {
-	struct scc_port *port = (struct scc_port *)tty->driver_data;
+	struct scc_port *port = tty->driver_data;
 	unsigned long	flags;
 	SCC_ACCESS_INIT(port);
 
@@ -945,7 +950,7 @@ static int scc_ioctl(struct tty_struct *tty, struct file *file,
 
 static int scc_break_ctl(struct tty_struct *tty, int break_state)
 {
-	struct scc_port *port = (struct scc_port *)tty->driver_data;
+	struct scc_port *port = tty->driver_data;
 	unsigned long	flags;
 	SCC_ACCESS_INIT(port);
 
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 008176edbd64..7900bd63b36d 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -819,8 +819,8 @@ static inline int resize_screen(struct vc_data *vc, int width, int height,
  *	ctrl_lock of the tty IFF a tty is passed.
  */
 
-static int vc_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
-		struct vc_data *vc, unsigned int cols, unsigned int lines)
+static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
+				unsigned int cols, unsigned int lines)
 {
 	unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
 	unsigned int old_cols, old_rows, old_row_size, old_screen_size;
@@ -932,7 +932,7 @@ static int vc_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
 		ws.ws_row = vc->vc_rows;
 		ws.ws_col = vc->vc_cols;
 		ws.ws_ypixel = vc->vc_scan_lines;
-		tty_do_resize(tty, real_tty, &ws);
+		tty_do_resize(tty, &ws);
 	}
 
 	if (CON_IS_VISIBLE(vc))
@@ -954,13 +954,12 @@ static int vc_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
 
 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
 {
-	return vc_do_resize(vc->vc_tty, vc->vc_tty, vc, cols, rows);
+	return vc_do_resize(vc->vc_tty, vc, cols, rows);
 }
 
 /**
  *	vt_resize		-	resize a VT
  *	@tty: tty to resize
- *	@real_tty: tty if a pty/tty pair
  *	@ws: winsize attributes
  *
  *	Resize a virtual terminal. This is called by the tty layer as we
@@ -970,15 +969,13 @@ int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
  *	Takes the console sem and the called methods then take the tty
  *	termios_mutex and the tty ctrl_lock in that order.
  */
-
-int vt_resize(struct tty_struct *tty, struct tty_struct *real_tty,
-	struct winsize *ws)
+static int vt_resize(struct tty_struct *tty, struct winsize *ws)
 {
 	struct vc_data *vc = tty->driver_data;
 	int ret;
 
 	acquire_console_sem();
-	ret = vc_do_resize(tty, real_tty, vc, ws->ws_col, ws->ws_row);
+	ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
 	release_console_sem();
 	return ret;
 }
@@ -2679,7 +2676,7 @@ static int con_write_room(struct tty_struct *tty)
 {
 	if (tty->stopped)
 		return 0;
-	return 4096;		/* No limit, really; we're not buffering */
+	return 32768;		/* No limit, really; we're not buffering */
 }
 
 static int con_chars_in_buffer(struct tty_struct *tty)
diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index 8944ce508e2f..a2dee0eb6dad 100644
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -366,7 +366,7 @@ do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_
 int vt_ioctl(struct tty_struct *tty, struct file * file,
 	     unsigned int cmd, unsigned long arg)
 {
-	struct vc_data *vc = (struct vc_data *)tty->driver_data;
+	struct vc_data *vc = tty->driver_data;
 	struct console_font_op op;	/* used in multiple places here */
 	struct kbd_struct * kbd;
 	unsigned int console;