diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2013-01-03 15:53:06 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-15 22:30:15 -0800 |
| commit | 2e124b4a390ca85325fae75764bef92f0547fa25 (patch) | |
| tree | 5519fbcdbe954e79b271ea6d31ac5a4dc754c4f5 | |
| parent | d6c53c0e9bd0a83f9f9ddbc9fd80141a54d83896 (diff) | |
| download | blackbird-op-linux-2e124b4a390ca85325fae75764bef92f0547fa25.tar.gz blackbird-op-linux-2e124b4a390ca85325fae75764bef92f0547fa25.zip | |
TTY: switch tty_flip_buffer_push
Now, we start converting tty buffer functions to actually use
tty_port. This will allow us to get rid of the need of tty in many
call sites. Only tty_port will needed and hence no more
tty_port_tty_get in those paths.
Now, the one where most of tty_port_tty_get gets removed:
tty_flip_buffer_push.
IOW we also closed all the races in drivers not using tty_port_tty_get
at all yet.
Also we move tty_flip_buffer_push declaration from include/linux/tty.h
to include/linux/tty_flip.h to all others while we are changing it
anyway.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
146 files changed, 446 insertions, 988 deletions
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c index 942022a5bc86..da2f319fb71d 100644 --- a/arch/ia64/hp/sim/simserial.c +++ b/arch/ia64/hp/sim/simserial.c @@ -53,9 +53,8 @@ struct tty_driver *hp_simserial_driver; static struct console *console; -static void receive_chars(struct tty_struct *tty) +static void receive_chars(struct tty_port *port) { - struct tty_port *port = tty->port; unsigned char ch; static unsigned char seen_esc = 0; @@ -85,7 +84,7 @@ static void receive_chars(struct tty_struct *tty) if (tty_insert_flip_char(port, ch, TTY_NORMAL) == 0) break; } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); } /* @@ -94,18 +93,9 @@ static void receive_chars(struct tty_struct *tty) static irqreturn_t rs_interrupt_single(int irq, void *dev_id) { struct serial_state *info = dev_id; - struct tty_struct *tty = tty_port_tty_get(&info->port); - if (!tty) { - printk(KERN_INFO "%s: tty=0 problem\n", __func__); - return IRQ_NONE; - } - /* - * pretty simple in our case, because we only get interrupts - * on inbound traffic - */ - receive_chars(tty); - tty_kref_put(tty); + receive_chars(&info->port); + return IRQ_HANDLED; } diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c index ae61bd692b4b..1dd20dbfd098 100644 --- a/arch/mn10300/kernel/mn10300-serial.c +++ b/arch/mn10300/kernel/mn10300-serial.c @@ -525,7 +525,6 @@ static void mn10300_serial_receive_interrupt(struct mn10300_serial_port *port) { struct uart_icount *icount = &port->uart.icount; struct tty_port *port = &port->uart.state->port; - struct tty_struct *tty = port->tty; unsigned ix; int count; u8 st, ch, push, status, overrun; @@ -538,7 +537,7 @@ static void mn10300_serial_receive_interrupt(struct mn10300_serial_port *port) count = tty_buffer_request_room(port, count); if (count == 0) { if (!port->low_latency) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); return; } @@ -547,7 +546,7 @@ try_again: ix = ACCESS_ONCE(port->rx_outp); if (CIRC_CNT(port->rx_inp, ix, MNSC_BUFFER_SIZE) == 0) { if (push && !port->low_latency) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); return; } @@ -679,7 +678,7 @@ insert: count--; if (count <= 0) { if (!port->low_latency) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); return; } diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c index 4d92a379eb21..d5cae55195ec 100644 --- a/arch/parisc/kernel/pdc_cons.c +++ b/arch/parisc/kernel/pdc_cons.c @@ -138,10 +138,6 @@ static const struct tty_operations pdc_console_tty_ops = { static void pdc_console_poll(unsigned long unused) { int data, count = 0; - struct tty_struct *tty = tty_port_tty_get(&tty_port); - - if (!tty) - return; while (1) { data = pdc_console_poll_key(NULL); @@ -152,9 +148,7 @@ static void pdc_console_poll(unsigned long unused) } if (count) - tty_flip_buffer_push(tty); - - tty_kref_put(tty); + tty_flip_buffer_push(&tty_port); if (pdc_cons.flags & CON_ENABLED) mod_timer(&pdc_console_timer, jiffies + PDC_CONS_POLL_DELAY); diff --git a/arch/um/drivers/chan.h b/arch/um/drivers/chan.h index 02b5a76e98d9..78f1b8999964 100644 --- a/arch/um/drivers/chan.h +++ b/arch/um/drivers/chan.h @@ -27,8 +27,7 @@ struct chan { void *data; }; -extern void chan_interrupt(struct line *line, - struct tty_struct *tty, int irq); +extern void chan_interrupt(struct line *line, int irq); extern int parse_chan_pair(char *str, struct line *line, int device, const struct chan_opts *opts, char **error_out); extern int write_chan(struct chan *chan, const char *buf, int len, diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c index 795bd8102205..15c553c239a1 100644 --- a/arch/um/drivers/chan_kern.c +++ b/arch/um/drivers/chan_kern.c @@ -131,11 +131,9 @@ void chan_enable_winch(struct chan *chan, struct tty_struct *tty) static void line_timer_cb(struct work_struct *work) { struct line *line = container_of(work, struct line, task.work); - struct tty_struct *tty = tty_port_tty_get(&line->port); if (!line->throttled) - chan_interrupt(line, tty, line->driver->read_irq); - tty_kref_put(tty); + chan_interrupt(line, line->driver->read_irq); } int enable_chan(struct line *line) @@ -546,7 +544,7 @@ int parse_chan_pair(char *str, struct line *line, int device, return 0; } -void chan_interrupt(struct line *line, struct tty_struct *tty, int irq) +void chan_interrupt(struct line *line, int irq) { struct tty_port *port = &line->port; struct chan *chan = line->chan_in; @@ -570,8 +568,11 @@ void chan_interrupt(struct line *line, struct tty_struct *tty, int irq) reactivate_fd(chan->fd, irq); if (err == -EIO) { if (chan->primary) { - if (tty != NULL) + struct tty_struct *tty = tty_port_tty_get(&line->port); + if (tty != NULL) { tty_hangup(tty); + tty_kref_put(tty); + } if (line->chan_out != chan) close_one_chan(line->chan_out, 1); } @@ -580,6 +581,5 @@ void chan_interrupt(struct line *line, struct tty_struct *tty, int irq) return; } out: - if (tty) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); } diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 9ffc28bd4b7a..f1b38571f94e 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -19,11 +19,10 @@ static irqreturn_t line_interrupt(int irq, void *data) { struct chan *chan = data; struct line *line = chan->line; - struct tty_struct *tty = tty_port_tty_get(&line->port); if (line) - chan_interrupt(line, tty, irq); - tty_kref_put(tty); + chan_interrupt(line, irq); + return IRQ_HANDLED; } @@ -234,7 +233,7 @@ void line_unthrottle(struct tty_struct *tty) struct line *line = tty->driver_data; line->throttled = 0; - chan_interrupt(line, tty, line->driver->read_irq); + chan_interrupt(line, line->driver->read_irq); /* * Maybe there is enough stuff pending that calling the interrupt diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c index 62447d63890c..da9866f7fecf 100644 --- a/arch/xtensa/platforms/iss/console.c +++ b/arch/xtensa/platforms/iss/console.c @@ -58,7 +58,8 @@ static int rs_open(struct tty_struct *tty, struct file * filp) tty->port = &serial_port; spin_lock(&timer_lock); if (tty->count == 1) { - setup_timer(&serial_timer, rs_poll, (unsigned long)tty); + setup_timer(&serial_timer, rs_poll, + (unsigned long)&serial_port); mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE); } spin_unlock(&timer_lock); @@ -97,9 +98,7 @@ static int rs_write(struct tty_struct * tty, static void rs_poll(unsigned long priv) { - struct tty_struct* tty = (struct tty_struct*) priv; - struct tty_port *port = tty->port; - + struct tty_port *port = (struct tty_port *)priv; struct timeval tv = { .tv_sec = 0, .tv_usec = 0 }; int i = 0; unsigned char c; @@ -113,7 +112,7 @@ static void rs_poll(unsigned long priv) } if (i) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE); diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 92dc7327c7aa..f334aec65fc7 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -886,7 +886,7 @@ 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, struct tty_struct *tty) +static void rx_ready_async(MGSLPC_INFO *info, int tcd) { struct tty_port *port = &info->port; unsigned char data, status, flag; @@ -894,14 +894,6 @@ static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty) int work = 0; struct mgsl_icount *icount = &info->icount; - if (!tty) { - /* tty is not available anymore */ - issue_command(info, CHA, CMD_RXRESET); - if (debug_level >= DEBUG_LEVEL_ISR) - printk("%s(%d):rx_ready_async(tty=NULL)\n",__FILE__,__LINE__); - return; - } - if (tcd) { /* early termination, get FIFO count from RBCL register */ fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); @@ -958,7 +950,7 @@ static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty) } if (work) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); } @@ -1218,7 +1210,7 @@ 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, tty); + rx_ready_async(info, isr & IRQ_RXEOM); } /* transmit IRQs */ diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c index 8e0ed663ba9b..ab20a0851dd2 100644 --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -133,8 +133,7 @@ static int ipoctal_get_icount(struct tty_struct *tty, return 0; } -static void ipoctal_irq_rx(struct ipoctal_channel *channel, - struct tty_struct *tty, u8 sr) +static void ipoctal_irq_rx(struct ipoctal_channel *channel, u8 sr) { struct tty_port *port = &channel->tty_port; unsigned char value; @@ -176,7 +175,7 @@ static void ipoctal_irq_rx(struct ipoctal_channel *channel, sr = ioread8(&channel->regs->r.sr); } while (isr & channel->isr_rx_rdy_mask); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); } static void ipoctal_irq_tx(struct ipoctal_channel *channel) @@ -209,15 +208,11 @@ static void ipoctal_irq_tx(struct ipoctal_channel *channel) static void ipoctal_irq_channel(struct ipoctal_channel *channel) { u8 isr, sr; - struct tty_struct *tty; /* If there is no client, skip the check */ if (!atomic_read(&channel->open)) return; - tty = tty_port_tty_get(&channel->tty_port); - if (!tty) - return; /* The HW is organized in pair of channels. See which register we need * to read from */ isr = ioread8(&channel->block_regs->r.isr); @@ -236,14 +231,13 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel) /* RX data */ if ((isr & channel->isr_rx_rdy_mask) && (sr & SR_RX_READY)) - ipoctal_irq_rx(channel, tty, sr); + ipoctal_irq_rx(channel, sr); /* TX of each character */ if ((isr & channel->isr_tx_rdy_mask) && (sr & SR_TX_READY)) ipoctal_irq_tx(channel); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&channel->tty_port); } static irqreturn_t ipoctal_irq_handler(void *arg) diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c index 6dcecd40a819..0fbf4f215d86 100644 --- a/drivers/isdn/gigaset/interface.c +++ b/drivers/isdn/gigaset/interface.c @@ -562,16 +562,8 @@ void gigaset_if_free(struct cardstate *cs) void gigaset_if_receive(struct cardstate *cs, unsigned char *buffer, size_t len) { - struct tty_struct *tty = tty_port_tty_get(&cs->port); - - if (tty == NULL) { - gig_dbg(DEBUG_IF, "receive on closed device"); - return; - } - tty_insert_flip_string(&cs->port, buffer, len); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&cs->port); } EXPORT_SYMBOL_GPL(gigaset_if_receive); diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c index 9bb9986659e4..d8a7d8323414 100644 --- a/drivers/isdn/i4l/isdn_tty.c +++ b/drivers/isdn/i4l/isdn_tty.c @@ -63,16 +63,11 @@ isdn_tty_try_read(modem_info *info, struct sk_buff *skb) struct tty_port *port = &info->port; int c; int len; - struct tty_struct *tty; char last; if (!info->online) return 0; - tty = port->tty; - if (!tty) - return 0; - if (!(info->mcr & UART_MCR_RTS)) return 0; @@ -110,7 +105,7 @@ isdn_tty_try_read(modem_info *info, struct sk_buff *skb) tty_insert_flip_char(port, last, 0xFF); else tty_insert_flip_char(port, last, TTY_NORMAL); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); kfree_skb(skb); return 1; @@ -127,7 +122,6 @@ isdn_tty_readmodem(void) int midx; int i; int r; - struct tty_struct *tty; modem_info *info; for (i = 0; i < ISDN_MAX_CHANNELS; i++) { @@ -145,20 +139,21 @@ isdn_tty_readmodem(void) if ((info->vonline & 1) && (info->emu.vpar[1])) isdn_audio_eval_silence(info); #endif - tty = info->port.tty; - if (tty) { - if (info->mcr & UART_MCR_RTS) { - /* CISCO AsyncPPP Hack */ - if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP)) - r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, &info->port, 0); - else - r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, &info->port, 1); - if (r) - tty_flip_buffer_push(tty); - } else - r = 1; + if (info->mcr & UART_MCR_RTS) { + /* CISCO AsyncPPP Hack */ + if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP)) + r = isdn_readbchan_tty(info->isdn_driver, + info->isdn_channel, + &info->port, 0); + else + r = isdn_readbchan_tty(info->isdn_driver, + info->isdn_channel, + &info->port, 1); + if (r) + tty_flip_buffer_push(&info->port); } else r = 1; + if (r) { info->rcvsched = 0; resched = 1; @@ -2230,7 +2225,6 @@ isdn_tty_stat_callback(int i, isdn_ctrl *c) void isdn_tty_at_cout(char *msg, modem_info *info) { - struct tty_struct *tty; struct tty_port *port = &info->port; atemu *m = &info->emu; char *p; @@ -2248,8 +2242,7 @@ isdn_tty_at_cout(char *msg, modem_info *info) l = strlen(msg); spin_lock_irqsave(&info->readlock, flags); - tty = port->tty; - if ((port->flags & ASYNC_CLOSING) || (!tty)) { + if (port->flags & ASYNC_CLOSING) { spin_unlock_irqrestore(&info->readlock, flags); return; } @@ -2301,7 +2294,7 @@ isdn_tty_at_cout(char *msg, modem_info *info) } else { spin_unlock_irqrestore(&info->readlock, flags); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); } } diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c index 894078be0b96..c931dfe6a59c 100644 --- a/drivers/mmc/card/sdio_uart.c +++ b/drivers/mmc/card/sdio_uart.c @@ -381,7 +381,6 @@ static void sdio_uart_stop_rx(struct sdio_uart_port *port) static void sdio_uart_receive_chars(struct sdio_uart_port *port, unsigned int *status) { - struct tty_struct *tty = tty_port_tty_get(&port->port); unsigned int ch, flag; int max_count = 256; @@ -418,24 +417,19 @@ static void sdio_uart_receive_chars(struct sdio_uart_port *port, } if ((*status & port->ignore_status_mask & ~UART_LSR_OE) == 0) - if (tty) - tty_insert_flip_char(&port->port, ch, flag); + tty_insert_flip_char(&port->port, ch, flag); /* * Overrun is special. Since it's reported immediately, * it doesn't affect the current character. */ if (*status & ~port->ignore_status_mask & UART_LSR_OE) - if (tty) - tty_insert_flip_char(&port->port, 0, - TTY_OVERRUN); + tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); *status = sdio_in(port, UART_LSR); } while ((*status & UART_LSR_DR) && (max_count-- > 0)); - if (tty) { - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + + tty_flip_buffer_push(&port->port); } static void sdio_uart_transmit_chars(struct sdio_uart_port *port) diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index d235ca07548f..f902a14da88c 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -2035,24 +2035,23 @@ static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) tty = tty_port_tty_get(&serial->port); /* Push data to tty */ - if (tty) { - write_length_remaining = urb->actual_length - - serial->curr_rx_urb_offset; - D1("data to push to tty"); - while (write_length_remaining) { - if (test_bit(TTY_THROTTLED, &tty->flags)) { - tty_kref_put(tty); - return -1; - } - curr_write_len = tty_insert_flip_string(&serial->port, - urb->transfer_buffer + serial->curr_rx_urb_offset, - write_length_remaining); - serial->curr_rx_urb_offset += curr_write_len; - write_length_remaining -= curr_write_len; - tty_flip_buffer_push(tty); + write_length_remaining = urb->actual_length - + serial->curr_rx_urb_offset; + D1("data to push to tty"); + while (write_length_remaining) { + if (tty && test_bit(TTY_THROTTLED, &tty->flags)) { + tty_kref_put(tty); + return -1; } - tty_kref_put(tty); + curr_write_len = tty_insert_flip_string(&serial->port, + urb->transfer_buffer + serial->curr_rx_urb_offset, + write_length_remaining); + serial->curr_rx_urb_offset += curr_write_len; + write_length_remaining -= curr_write_len; + tty_flip_buffer_push(&serial->port); } + tty_kref_put(tty); + if (write_length_remaining == 0) { serial->curr_rx_urb_offset = 0; serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c index 41b75c5ae0d5..2f58e9fde156 100644 --- a/drivers/s390/char/con3215.c +++ b/drivers/s390/char/con3215.c @@ -413,7 +413,7 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, case CTRLCHAR_CTRL: tty_insert_flip_char(&raw->port, cchar, TTY_NORMAL); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&raw->port); break; case CTRLCHAR_NONE: @@ -427,7 +427,7 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, count -= 2; tty_insert_flip_string(&raw->port, raw->inbuf, count); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&raw->port); break; } } else if (req->type == RAW3215_WRITE) { diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c index 19b7c516c07d..14b4cb8abcc8 100644 --- a/drivers/s390/char/sclp_tty.c +++ b/drivers/s390/char/sclp_tty.c @@ -343,7 +343,7 @@ sclp_tty_input(unsigned char* buf, unsigned int count) break; case CTRLCHAR_CTRL: tty_insert_flip_char(&sclp_port, cchar, TTY_NORMAL); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&sclp_port); break; case CTRLCHAR_NONE: /* send (normal) input to line discipline */ @@ -355,7 +355,7 @@ sclp_tty_input(unsigned char* buf, unsigned int count) tty_insert_flip_char(&sclp_port, '\n', TTY_NORMAL); } else tty_insert_flip_string(&sclp_port, buf, count - 2); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&sclp_port); break; } tty_kref_put(tty); diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c index 0eca99b98712..6c92f62623be 100644 --- a/drivers/s390/char/sclp_vt220.c +++ b/drivers/s390/char/sclp_vt220.c @@ -461,14 +461,9 @@ sclp_vt220_write(struct tty_struct *tty, const unsigned char *buf, int count) static void sclp_vt220_receiver_fn(struct evbuf_header *evbuf) { - struct tty_struct *tty = tty_port_tty_get(&sclp_vt220_port); char *buffer; unsigned int count; - /* Ignore input if device is not open */ - if (tty == NULL) - return; - buffer = (char *) ((addr_t) evbuf + sizeof(struct evbuf_header)); count = evbuf->length - sizeof(struct evbuf_header); @@ -481,10 +476,9 @@ sclp_vt220_receiver_fn(struct evbuf_header *evbuf) buffer++; count--; tty_insert_flip_string(&sclp_vt220_port, buffer, count); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&sclp_vt220_port); break; } - tty_kref_put(tty); } /* diff --git a/drivers/staging/ccg/u_serial.c b/drivers/staging/ccg/u_serial.c index 7df2c02d1137..b10947ae0ac5 100644 --- a/drivers/staging/ccg/u_serial.c +++ b/drivers/staging/ccg/u_serial.c @@ -491,12 +491,8 @@ static void gs_rx_push(unsigned long _port) req = list_first_entry(queue, struct usb_request, list); - /* discard data if tty was closed */ - if (!tty) - goto recycle; - /* leave data queued if tty was rx throttled */ - if (test_bit(TTY_THROTTLED, &tty->flags)) + if (tty && test_bit(TTY_THROTTLED, &tty->flags)) break; switch (req->status) { @@ -542,7 +538,6 @@ static void gs_rx_push(unsigned long _port) } port->n_read = 0; } -recycle: list_move(&req->list, &port->read_pool); port->read_started--; } @@ -550,8 +545,8 @@ recycle: /* Push from tty to ldisc; without low_latency set this is handled by * a workqueue, so we won't get callbacks and can hold port_lock */ - if (tty && do_push) - tty_flip_buffer_push(tty); + if (do_push) + tty_flip_buffer_push(&port->port); /* We want our data queue to become empty ASAP, keeping data diff --git a/drivers/staging/dgrp/dgrp_net_ops.c b/drivers/staging/dgrp/dgrp_net_ops.c index e618a667d84c..4c7abfabf197 100644 --- a/drivers/staging/dgrp/dgrp_net_ops.c +++ b/drivers/staging/dgrp/dgrp_net_ops.c @@ -234,7 +234,7 @@ static void dgrp_input(struct ch_struct *ch) tty_insert_flip_string_flags(&ch->port, myflipbuf, myflipflagbuf, len); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&ch->port); ch->ch_rxcount += len; } @@ -2958,7 +2958,7 @@ check_query: tty_buffer_request_room(&ch->port, 1); tty_insert_flip_char(&ch->port, 0, TTY_BREAK); - tty_flip_buffer_push(ch->ch_tun.un_tty); + tty_flip_buffer_push(&ch->port); } diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c index a2a0c43dec1c..b403393c49c3 100644 --- a/drivers/staging/fwserial/fwserial.c +++ b/drivers/staging/fwserial/fwserial.c @@ -489,16 +489,11 @@ static void fwtty_do_hangup(struct work_struct *work) static void fwtty_emit_breaks(struct work_struct *work) { struct fwtty_port *port = to_port(to_delayed_work(work), emit_breaks); - struct tty_struct *tty; static const char buf[16]; unsigned long now = jiffies; unsigned long elapsed = now - port->break_last; int n, t, c, brk = 0; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - /* generate breaks at the line rate (but at least 1) */ n = (elapsed * port->cps) / HZ + 1; port->break_last = now; @@ -514,9 +509,7 @@ static void fwtty_emit_breaks(struct work_struct *work) if (c < t) break; } - tty_flip_buffer_push(tty); - - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); if (port->mstatus & (UART_LSR_BI << 24)) schedule_delayed_work(&port->emit_breaks, FREQ_BREAKS); @@ -530,10 +523,6 @@ static void fwtty_pushrx(struct work_struct *work) struct buffered_rx *buf, *next; int n, c = 0; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - spin_lock_bh(&port->lock); list_for_each_entry_safe(buf, next, &port->buf_list, list) { n = tty_insert_flip_string_fixed_flag(&port->port, buf->data, @@ -545,7 +534,11 @@ static void fwtty_pushrx(struct work_struct *work) memmove(buf->data, buf->data + n, buf->n - n); buf->n -= n; } - __fwtty_throttle(port, tty); + tty = tty_port_tty_get(&port->port); + if (tty) { + __fwtty_throttle(port, tty); + tty_kref_put(tty); + } break; } else { list_del(&buf->list); @@ -553,13 +546,11 @@ static void fwtty_pushrx(struct work_struct *work) } } if (c > 0) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); if (list_empty(&port->buf_list)) clear_bit(BUFFERING_RX, &port->flags); spin_unlock_bh(&port->lock); - - tty_kref_put(tty); } static int fwtty_buffer_rx(struct fwtty_port *port, unsigned char *d, size_t n) @@ -594,10 +585,6 @@ static int fwtty_rx(struct fwtty_port *port, unsigned char *data, size_t len) unsigned lsr; int err = 0; - tty = tty_port_tty_get(&port->port); - if (!tty) - return -ENOENT; - fwtty_dbg(port, "%d", n); profile_size_distrib(port->stats.reads, n); @@ -634,16 +621,20 @@ static int fwtty_rx(struct fwtty_port *port, unsigned char *data, size_t len) c = tty_insert_flip_string_fixed_flag(&port->port, data, TTY_NORMAL, n); if (c > 0) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); n -= c; if (n) { /* start buffering and throttling */ n -= fwtty_buffer_rx(port, &data[c], n); - spin_lock_bh(&port->lock); - __fwtty_throttle(port, tty); - spin_unlock_bh(&port->lock); + tty = tty_port_tty_get(&port->port); + if (tty) { + spin_lock_bh(&port->lock); + __fwtty_throttle(port, tty); + spin_unlock_bh(&port->lock); + tty_kref_put(tty); + } } } else n -= fwtty_buffer_rx(port, data, n); @@ -654,8 +645,6 @@ static int fwtty_rx(struct fwtty_port *port, unsigned char *data, size_t len) } out: - tty_kref_put(tty); - port->icount.rx += len; port->stats.lost += n; return err; diff --git a/drivers/staging/serqt_usb2/serqt_usb2.c b/drivers/staging/serqt_usb2/serqt_usb2.c index 14965662d09c..df29a3de29f2 100644 --- a/drivers/staging/serqt_usb2/serqt_usb2.c +++ b/drivers/staging/serqt_usb2/serqt_usb2.c @@ -290,8 +290,7 @@ static void qt_interrupt_callback(struct urb *urb) /* FIXME */ } -static void qt_status_change_check(struct tty_struct *tty, - struct urb *urb, +static void qt_status_change_check(struct urb *urb, struct quatech_port *qt_port, struct usb_serial_port *port) { @@ -348,7 +347,7 @@ static void qt_status_change_check(struct tty_struct *tty, tty_insert_flip_char(&port->port, data[i], TTY_NORMAL); } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } static void qt_read_bulk_callback(struct urb *urb) @@ -411,7 +410,7 @@ static void qt_read_bulk_callback(struct urb *urb) } if (urb->actual_length) - qt_status_change_check(tty, urb, qt_port, port); + qt_status_change_check(urb, qt_port, port); /* Continue trying to always read */ usb_fill_bulk_urb(port->read_urb, serial->dev, @@ -427,7 +426,7 @@ static void qt_read_bulk_callback(struct urb *urb) __func__, result); else { if (urb->actual_length) { - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); tty_schedule_flip(tty); } } diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 2d1357acbc23..4c7d70172193 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -251,7 +251,6 @@ static void receive_chars(struct serial_state *info) { int status; int serdatr; - struct tty_struct *tty = info->tport.tty; unsigned char ch, flag; struct async_icount *icount; int oe = 0; @@ -314,7 +313,7 @@ static void receive_chars(struct serial_state *info) #endif flag = TTY_BREAK; if (info->tport.flags & ASYNC_SAK) - do_SAK(tty); + do_SAK(info->tport.tty); } else if (status & UART_LSR_PE) flag = TTY_PARITY; else if (status & UART_LSR_FE) @@ -331,7 +330,7 @@ static void receive_chars(struct serial_state *info) tty_insert_flip_char(&info->tport, ch, flag); if (oe == 1) tty_insert_flip_char(&info->tport, 0, TTY_OVERRUN); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&info->tport); out: return; } diff --git a/drivers/tty/bfin_jtag_comm.c b/drivers/tty/bfin_jtag_comm.c index 143c38579cb5..a93a424873fa 100644 --- a/drivers/tty/bfin_jtag_comm.c +++ b/drivers/tty/bfin_jtag_comm.c @@ -95,18 +95,16 @@ bfin_jc_emudat_manager(void *arg) /* if incoming data is ready, eat it */ if (bfin_read_DBGSTAT() & EMUDIF) { - if (tty != NULL) { - uint32_t emudat = bfin_read_emudat(); - if (inbound_len == 0) { - pr_debug("incoming length: 0x%08x\n", emudat); - inbound_len = emudat; - } else { - size_t num_chars = (4 <= inbound_len ? 4 : inbound_len); - pr_debug(" incoming data: 0x%08x (pushing %zu)\n", emudat, num_chars); - inbound_len -= num_chars; - tty_insert_flip_string(&port, (unsigned char *)&emudat, num_chars); - tty_flip_buffer_push(tty); - } + uint32_t emudat = bfin_read_emudat(); + if (inbound_len == 0) { + pr_debug("incoming length: 0x%08x\n", emudat); + inbound_len = emudat; + } else { + size_t num_chars = (4 <= inbound_len ? 4 : inbound_len); + pr_debug(" incoming data: 0x%08x (pushing %zu)\n", emudat, num_chars); + inbound_len -= num_chars; + tty_insert_flip_string(&port, (unsigned char *)&emudat, num_chars); + tty_flip_buffer_push(&port); } } diff --git a/drivers/tty/ehv_bytechan.c b/drivers/tty/ehv_bytechan.c index 5164f9a57017..ed92622b8949 100644 --- a/drivers/tty/ehv_bytechan.c +++ b/drivers/tty/ehv_bytechan.c @@ -371,16 +371,11 @@ console_initcall(ehv_bc_console_init); static irqreturn_t ehv_bc_tty_rx_isr(int irq, void *data) { struct ehv_bc_data *bc = data; - struct tty_struct *ttys = tty_port_tty_get(&bc->port); unsigned int rx_count, tx_count, len; int count; char buffer[EV_BYTE_CHANNEL_MAX_BYTES]; int ret; - /* ttys could be NULL during a hangup */ - if (!ttys) - return IRQ_HANDLED; - /* Find out how much data needs to be read, and then ask the TTY layer * if it can handle that much. We want to ensure that every byte we * read from the byte channel will be accepted by the TTY layer. @@ -422,9 +417,7 @@ static irqreturn_t ehv_bc_tty_rx_isr(int irq, void *data) } /* Tell the tty layer that we're done. */ - tty_flip_buffer_push(ttys); - - tty_kref_put(ttys); + tty_flip_buffer_push(&bc->port); return IRQ_HANDLED; } diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 8c2fe3a0e091..eb255e807c06 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -691,7 +691,7 @@ int hvc_poll(struct hvc_struct *hp) a minimum for performance. */ timeout = MIN_TIMEOUT; - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&hp->port); } tty_kref_put(tty); diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index 7bfc0a924b2f..1956593ee89d 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -623,7 +623,7 @@ static int hvcs_io(struct hvcs_struct *hvcsd) spin_unlock_irqrestore(&hvcsd->lock, flags); /* This is synch because tty->low_latency == 1 */ if(got) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&hvcsd->port); if (!got) { /* Do this _after_ the flip_buffer_push */ diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c index 1f528b8ebf5f..dc591290120b 100644 --- a/drivers/tty/hvc/hvsi.c +++ b/drivers/tty/hvc/hvsi.c @@ -465,7 +465,7 @@ static int hvsi_load_chunk(struct hvsi_struct *hp, struct tty_struct *tty, compact_inbuf(hp, packet); if (flip) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&hp->port); return 1; } @@ -511,7 +511,7 @@ static irqreturn_t hvsi_interrupt(int irq, void *arg) /* we weren't hung up and we weren't throttled, so we can * deliver the rest now */ hvsi_send_overflow(hp); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&hp->port); } spin_unlock_irqrestore(&hp->lock, flags); @@ -998,7 +998,7 @@ static void hvsi_unthrottle(struct tty_struct *tty) spin_lock_irqsave(&hp->lock, flags); if (hp->n_throttle) { hvsi_send_overflow(hp); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&hp->port); } spin_unlock_irqrestore(&hp->lock, flags); diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c index c43da7445432..8fd72ff9436e 100644 --- a/drivers/tty/ipwireless/tty.c +++ b/drivers/tty/ipwireless/tty.c @@ -160,15 +160,9 @@ static void ipw_close(struct tty_struct *linux_tty, struct file *filp) void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, unsigned int length) { - struct tty_struct *linux_tty; int work = 0; mutex_lock(&tty->ipw_tty_mutex); - linux_tty = tty->port.tty; - if (linux_tty == NULL) { - mutex_unlock(&tty->ipw_tty_mutex); - return; - } if (!tty->port.count) { mutex_unlock(&tty->ipw_tty_mutex); @@ -187,7 +181,7 @@ void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, * This may sleep if ->low_latency is set */ if (work) - tty_flip_buffer_push(linux_tty); + tty_flip_buffer_push(&tty->port); } static void ipw_write_packet_sent_callback(void *callback_data, diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c index c70144f55fc0..858291ca889c 100644 --- a/drivers/tty/isicom.c +++ b/drivers/tty/isicom.c @@ -637,7 +637,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id) tty_insert_flip_char(&port->port, 0, TTY_BREAK); if (port->port.flags & ASYNC_SAK) do_SAK(tty); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); break; case 2: /* Statistics */ @@ -671,7 +671,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id) byte_count -= 2; } } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } outw(0x0000, base+0x04); /* enable interrupts */ spin_unlock(&card->card_lock); diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index e9cdfdfe06e9..ad34a202a34d 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -2145,7 +2145,7 @@ end_intr: * recursive locking. */ spin_unlock(&port->slock); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); spin_lock(&port->slock); } diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 4a3342d21c8f..d84dcfeadce3 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -1141,7 +1141,6 @@ static void gsm_control_modem(struct gsm_mux *gsm, u8 *data, int clen) static void gsm_control_rls(struct gsm_mux *gsm, u8 *data, int clen) { struct tty_port *port; - struct tty_struct *tty; unsigned int addr = 0 ; u8 bits; int len = clen; @@ -1174,12 +1173,8 @@ static void gsm_control_rls(struct gsm_mux *gsm, u8 *data, int clen) if (bits & 8) tty_insert_flip_char(port, 0, TTY_FRAME); - /* See if we have an uplink tty */ - tty = tty_port_tty_get(port); - if (tty) { - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + tty_flip_buffer_push(port); + gsm_control_reply(gsm, CMD_RLS, data, clen); } @@ -1552,36 +1547,37 @@ static void gsm_dlci_data(struct gsm_dlci *dlci, u8 *data, int clen) { /* krefs .. */ struct tty_port *port = &dlci->port; - struct tty_struct *tty = tty_port_tty_get(port); + struct tty_struct *tty; unsigned int modem = 0; int len = clen; if (debug & 16) - pr_debug("%d bytes for tty %p\n", len, tty); - if (tty) { - switch (dlci->adaption) { - /* Unsupported types */ - /* Packetised interruptible data */ - case 4: - break; - /* Packetised uininterruptible voice/data */ - case 3: - break; - /* Asynchronous serial with line state in each frame */ - case 2: - while (gsm_read_ea(&modem, *data++) == 0) { - len--; - if (len == 0) - return; - } + pr_debug("%d bytes for tty\n", len); + switch (dlci->adaption) { + /* Unsupported types */ + /* Packetised interruptible data */ + case 4: + break; + /* Packetised uininterruptible voice/data */ + case 3: + break; + /* Asynchronous serial with line state in each frame */ + case 2: + while (gsm_read_ea(&modem, *data++) == 0) { + len--; + if (len == 0) + return; + } + tty = tty_port_tty_get(port); + if (tty) { gsm_process_modem(tty, dlci, modem, clen); - /* Line state will go via DLCI 0 controls only */ - case 1: - default: - tty_insert_flip_string(port, data, len); - tty_flip_buffer_push(tty); + tty_kref_put(tty); } - tty_kref_put(tty); + /* Line state will go via DLCI 0 controls only */ + case 1: + default: + tty_insert_flip_string(port, data, len); + tty_flip_buffer_push(port); } } diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c index 941fe8060ea5..afdd7732d925 100644 --- a/drivers/tty/nozomi.c +++ b/drivers/tty/nozomi.c @@ -1272,15 +1272,11 @@ 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++) { - 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); - } - } + + for (a = 0; a < NOZOMI_MAX_PORTS; a++) + if (test_and_clear_bit(a, &dc->flip)) + tty_flip_buffer_push(&dc->port[a].port); + return IRQ_HANDLED; none: spin_unlock(&dc->spin_mutex); diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 3c285d398f38..32d027c303aa 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -123,7 +123,7 @@ static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c) c = tty_insert_flip_string(to->port, buf, c); /* And shovel */ if (c) { - tty_flip_buffer_push(to); + tty_flip_buffer_push(to->port); tty_wakeup(tty); } } diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index 5848a767001a..8073cc0dff59 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -315,9 +315,8 @@ static inline int rocket_paranoia_check(struct r_port *info, * that receive data is present on a serial port. Pulls data from FIFO, moves it into the * tty layer. */ -static void rp_do_receive(struct r_port *info, - struct tty_struct *tty, - CHANNEL_t * cp, unsigned int ChanStatus) +static void rp_do_receive(struct r_port *info, CHANNEL_t *cp, + unsigned int ChanStatus) { unsigned int CharNStat; int ToRecv, wRecv, space; @@ -416,7 +415,7 @@ static void rp_do_receive(struct r_port *info, cbuf[ToRecv - 1] = sInB(sGetTxRxDataIO(cp)); } /* Push the data up to the tty layer */ - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&info->port); } /* @@ -495,7 +494,6 @@ static void rp_do_transmit(struct r_port *info) static void rp_handle_port(struct r_port *info) { CHANNEL_t *cp; - struct tty_struct *tty; unsigned int IntMask, ChanStatus; if (!info) @@ -506,12 +504,7 @@ static void rp_handle_port(struct r_port *info) "info->flags & NOT_INIT\n"); return; } - tty = tty_port_tty_get(&info->port); - if (!tty) { - printk(KERN_WARNING "rp: WARNING: rp_handle_port called with " - "tty==NULL\n"); - return; - } + cp = &info->channel; IntMask = sGetChanIntID(cp) & info->intmask; @@ -520,7 +513,7 @@ static void rp_handle_port(struct r_port *info) #endif ChanStatus = sGetChanStatus(cp); if (IntMask & RXF_TRIG) { /* Rx FIFO trigger level */ - rp_do_receive(info, tty, cp, ChanStatus); + rp_do_receive(info, cp, ChanStatus); } if (IntMask & DELTA_CD) { /* CD change */ #if (defined(ROCKET_DEBUG_OPEN) || defined(ROCKET_DEBUG_INTR) || defined(ROCKET_DEBUG_HANGUP)) @@ -528,10 +521,15 @@ static void rp_handle_port(struct r_port *info) (ChanStatus & CD_ACT) ? "on" : "off"); #endif if (!(ChanStatus & CD_ACT) && info->cd_status) { + struct tty_struct *tty; #ifdef ROCKET_DEBUG_HANGUP printk(KERN_INFO "CD drop, calling hangup.\n"); #endif - tty_hangup(tty); + tty = tty_port_tty_get(&info->port); + if (tty) { + tty_hangup(tty); + tty_kref_put(tty); + } } info->cd_status = (ChanStatus & CD_ACT) ? 1 : 0; wake_up_interruptible(&info->port.open_wait); @@ -544,7 +542,6 @@ static void rp_handle_port(struct r_port *info) printk(KERN_INFO "DSR change...\n"); } #endif - tty_kref_put(tty); } /* diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c index a44345a2dbb4..c7e8b60b6177 100644 --- a/drivers/tty/serial/21285.c +++ b/drivers/tty/serial/21285.c @@ -85,7 +85,6 @@ static void serial21285_enable_ms(struct uart_port *port) static irqreturn_t serial21285_rx_chars(int irq, void *dev_id) { struct uart_port *port = dev_id; - struct tty_struct *tty = port->state->port.tty; unsigned int status, ch, flag, rxs, max_count = 256; status = *CSR_UARTFLG; @@ -115,7 +114,7 @@ static irqreturn_t serial21285_rx_chars(int irq, void *dev_id) status = *CSR_UARTFLG; } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 5fb6577b94dc..0d771ec16750 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -1323,7 +1323,6 @@ unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr) { struct uart_port *port = &up->port; - struct tty_struct *tty = port->state->port.tty; unsigned char ch; int max_count = 256; char flag; @@ -1388,7 +1387,7 @@ ignore_char: lsr = serial_in(up, UART_LSR); } while ((lsr & (UART_LSR_DR | UART_LSR_BI)) && (max_count-- > 0)); spin_unlock(&port->lock); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); spin_lock(&port->lock); return lsr; } diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c index 872f14ae43d2..84b90fd48063 100644 --- a/drivers/tty/serial/altera_jtaguart.c +++ b/drivers/tty/serial/altera_jtaguart.c @@ -139,7 +139,7 @@ static void altera_jtaguart_rx_chars(struct altera_jtaguart *pp) uart_insert_char(port, 0, 0, ch, flag); } - tty_flip_buffer_push(port->state->port.tty); + tty_flip_buffer_push(&port->state->port); } static void altera_jtaguart_tx_chars(struct altera_jtaguart *pp) diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 684a0808e1c7..e133c8814bb5 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -231,7 +231,7 @@ static void altera_uart_rx_chars(struct altera_uart *pp) flag); } - tty_flip_buffer_push(port->state->port.tty); + tty_flip_buffer_push(&port->state->port); } static void altera_uart_tx_chars(struct altera_uart *pp) diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c index 22317dd16474..c36840519527 100644 --- a/drivers/tty/serial/amba-pl010.c +++ b/drivers/tty/serial/amba-pl010.c @@ -116,7 +116,6 @@ static void pl010_enable_ms(struct uart_port *port) static void pl010_rx_chars(struct uart_amba_port *uap) { - struct tty_struct *tty = uap->port.state->port.tty; unsigned int status, ch, flag, rsr, max_count = 256; status = readb(uap->port.membase + UART01x_FR); @@ -165,7 +164,7 @@ static void pl010_rx_chars(struct uart_amba_port *uap) status = readb(uap->port.membase + UART01x_FR); } spin_unlock(&uap->port.lock); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&uap->port.state->port); spin_lock(&uap->port.lock); } diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index e1257d17f5f0..3ea5408fcbeb 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -699,7 +699,6 @@ static void pl011_dma_rx_chars(struct uart_amba_port *uap, bool readfifo) { struct tty_port *port = &uap->port.state->port; - struct tty_struct *tty = port->tty; struct pl011_sgbuf *sgbuf = use_buf_b ? &uap->dmarx.sgbuf_b : &uap->dmarx.sgbuf_a; struct device *dev = uap->dmarx.chan->device->dev; @@ -754,7 +753,7 @@ static void pl011_dma_rx_chars(struct uart_amba_port *uap, dev_vdbg(uap->port.dev, "Took %d chars from DMA buffer and %d chars from the FIFO\n", dma_count, fifotaken); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); spin_lock(&uap->port.lock); } @@ -1076,12 +1075,10 @@ static void pl011_enable_ms(struct uart_port *port) static void pl011_rx_chars(struct uart_amba_port *uap) { - struct tty_struct *tty = uap->port.state->port.tty; - pl011_fifo_to_tty(uap); spin_unlock(&uap->port.lock); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&uap->port.state->port); /* * If we were temporarily out of DMA mode for a while, * attempt to switch back to DMA mode again. diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c index 59ae2b53e765..6331464d9101 100644 --- a/drivers/tty/serial/apbuart.c +++ b/drivers/tty/serial/apbuart.c @@ -78,7 +78,6 @@ static void apbuart_enable_ms(struct uart_port *port) static void apbuart_rx_chars(struct uart_port *port) { - struct tty_struct *tty = port->state->port.tty; unsigned int status, ch, rsr, flag; unsigned int max_chars = port->fifosize; @@ -126,7 +125,7 @@ static void apbuart_rx_chars(struct uart_port *port) status = UART_GET_STATUS(port); } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); } static void apbuart_tx_chars(struct uart_port *port) diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 6ca5dd615f9e..27f20c57abed 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -298,10 +298,8 @@ static void ar933x_uart_set_termios(struct uart_port *port, static void ar933x_uart_rx_chars(struct ar933x_uart_port *up) { struct tty_port *port = &up->port.state->port; - struct tty_struct *tty; int max_count = 256; - tty = tty_port_tty_get(port); do { unsigned int rdata; unsigned char ch; @@ -324,10 +322,7 @@ static void ar933x_uart_rx_chars(struct ar933x_uart_port *up) tty_insert_flip_char(port, ch, TTY_NORMAL); } while (max_count-- > 0); - if (tty) { - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + tty_flip_buffer_push(port); } static void ar933x_uart_tx_chars(struct ar933x_uart_port *up) diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c index b46860104312..da734222e537 100644 --- a/drivers/tty/serial/arc_uart.c +++ b/drivers/tty/serial/arc_uart.c @@ -211,12 +211,8 @@ static void arc_serial_start_tx(struct uart_port *port) static void arc_serial_rx_chars(struct arc_uart_port *uart) { - struct tty_struct *tty = tty_port_tty_get(&uart->port.state->port); unsigned int status, ch, flg = 0; - if (!tty) - return; - /* * UART has 4 deep RX-FIFO. Driver's recongnition of this fact * is very subtle. Here's how ... @@ -252,10 +248,8 @@ static void arc_serial_rx_chars(struct arc_uart_port *uart) uart_insert_char(&uart->port, status, RXOERR, ch, flg); done: - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&uart->port.state->port); } - - tty_kref_put(tty); } /* diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 929567038c5a..d4a7c241b751 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -774,7 +774,7 @@ static void atmel_rx_from_ring(struct uart_port *port) * uart_start(), which takes the lock. */ spin_unlock(&port->lock); - tty_flip_buffer_push(port->state->port.tty); + tty_flip_buffer_push(&port->state->port); spin_lock(&port->lock); } @@ -782,7 +782,6 @@ static void atmel_rx_from_dma(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; struct atmel_dma_buffer *pdc; int rx_idx = atmel_port->pdc_rx_idx; unsigned int head; @@ -850,7 +849,7 @@ static void atmel_rx_from_dma(struct uart_port *port) * uart_start(), which takes the lock. */ spin_unlock(&port->lock); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); spin_lock(&port->lock); UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT); diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c index de30b1909728..719594e5fc21 100644 --- a/drivers/tty/serial/bcm63xx_uart.c +++ b/drivers/tty/serial/bcm63xx_uart.c @@ -236,14 +236,12 @@ static const char *bcm_uart_type(struct uart_port *port) static void bcm_uart_do_rx(struct uart_port *port) { struct tty_port *port = &port->state->port; - struct tty_struct *tty; unsigned int max_count; /* limit number of char read in interrupt, should not be * higher than fifo size anyway since we're much faster than * serial port */ max_count = 32; - tty = port->tty; do { unsigned int iestat, c, cstat; char flag; @@ -305,7 +303,7 @@ static void bcm_uart_do_rx(struct uart_port *port) } while (--max_count); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); } /* diff --git a/drivers/tty/serial/bfin_sport_uart.c b/drivers/tty/serial/bfin_sport_uart.c index e4d3ac2e8992..487c173b0f72 100644 --- a/drivers/tty/serial/bfin_sport_uart.c +++ b/drivers/tty/serial/bfin_sport_uart.c @@ -150,7 +150,6 @@ static irqreturn_t sport_uart_rx_irq(int irq, void *dev_id) { struct sport_uart_port *up = dev_id; struct tty_port *port = &up->port.state->port; - struct tty_struct *tty = tport->tty; unsigned int ch; spin_lock(&up->port.lock); @@ -162,7 +161,8 @@ static irqreturn_t sport_uart_rx_irq(int irq, void *dev_id) if (!uart_handle_sysrq_char(&up->port, ch)) tty_insert_flip_char(port, ch, TTY_NORMAL); } - tty_flip_buffer_push(tty); + /* XXX this won't deadlock with lowlat? */ + tty_flip_buffer_push(port); spin_unlock(&up->port.lock); diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index 2e2b2c1cb722..12dceda9db33 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -223,7 +223,6 @@ static void bfin_serial_enable_ms(struct uart_port *port) #ifdef CONFIG_SERIAL_BFIN_PIO static void bfin_serial_rx_chars(struct bfin_serial_port *uart) { - struct tty_struct *tty = NULL; unsigned int status, ch, flg; static struct timeval anomaly_start = { .tv_sec = 0 }; @@ -242,11 +241,9 @@ static void bfin_serial_rx_chars(struct bfin_serial_port *uart) return; } - if (!uart->port.state || !uart->port.state->port.tty) + if (!uart->port.state) return; #endif - tty = uart->port.state->port.tty; - if (ANOMALY_05000363) { /* The BF533 (and BF561) family of processors have a nice anomaly * where they continuously generate characters for a "single" break. @@ -325,7 +322,7 @@ static void bfin_serial_rx_chars(struct bfin_serial_port *uart) uart_insert_char(&uart->port, status, OE, ch, flg); ignore_char: - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&uart->port.state->port); } static void bfin_serial_tx_chars(struct bfin_serial_port *uart) @@ -426,7 +423,6 @@ static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart) static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart) { - struct tty_struct *tty = uart->port.state->port.tty; int i, flg, status; status = UART_GET_LSR(uart); @@ -471,7 +467,7 @@ static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart) } dma_ignore_char: - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&uart->port.state->port); } void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart) diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c index 3fd2526d121e..bfb17968c8db 100644 --- a/drivers/tty/serial/clps711x.c +++ b/drivers/tty/serial/clps711x.c @@ -85,12 +85,8 @@ static void uart_clps711x_enable_ms(struct uart_port *port) static irqreturn_t uart_clps711x_int_rx(int irq, void *dev_id) { struct uart_port *port = dev_id; - struct tty_struct *tty = tty_port_tty_get(&port->state->port); unsigned int status, ch, flg; - if (!tty) - return IRQ_HANDLED; - for (;;) { status = clps_readl(SYSFLG(port)); if (status & SYSFLG_URXFE) @@ -130,9 +126,7 @@ static irqreturn_t uart_clps711x_int_rx(int irq, void *dev_id) uart_insert_char(port, status, UARTDR_OVERR, ch, flg); } - tty_flip_buffer_push(tty); - - tty_kref_put(tty); + tty_flip_buffer_push(&port->state->port); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index 0bb24378a3c0..97f4e1858649 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -246,7 +246,6 @@ static void cpm_uart_int_rx(struct uart_port *port) unsigned char ch; u8 *cp; struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; cbd_t __iomem *bdp; u16 status; @@ -323,7 +322,7 @@ static void cpm_uart_int_rx(struct uart_port *port) pinfo->rx_cur = bdp; /* activate BH processing */ - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); return; diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index 52449adc09ac..45acf103433e 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -2104,17 +2104,10 @@ static int force_eop_if_needed(struct e100_serial *info) static void flush_to_flip_buffer(struct e100_serial *info) { - struct tty_struct *tty; struct etrax_recv_buffer *buffer; unsigned long flags; local_irq_save(flags); - tty = info->port.tty; - - if (!tty) { - local_irq_restore(flags); - return; - } while ((buffer = info->first_recv_buffer) != NULL) { unsigned int count = buffer->length; @@ -2138,7 +2131,7 @@ static void flush_to_flip_buffer(struct e100_serial *info) local_irq_restore(flags); /* This includes a check for low-latency */ - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&info->port); } static void check_flush_timeout(struct e100_serial *info) @@ -2274,12 +2267,6 @@ static struct e100_serial * handle_ser_rx_interrupt_no_dma(struct e100_serial *info) { unsigned long data_read; - struct tty_struct *tty = info->port.tty; - - if (!tty) { - printk("!NO TTY!\n"); - return info; - } /* Read data and status at the same time */ data_read = *((unsigned long *)&info->ioport[REG_DATA_STATUS32]); @@ -2382,7 +2369,7 @@ more_data: goto more_data; } - tty_flip_buffer_push(info->port.tty); + tty_flip_buffer_push(&info->port); return info; } diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c index 6491b8644a7f..2f2b2e538a54 100644 --- a/drivers/tty/serial/dz.c +++ b/drivers/tty/serial/dz.c @@ -187,7 +187,6 @@ static inline void dz_receive_chars(struct dz_mux *mux) { struct uart_port *uport; struct dz_port *dport = &mux->dport[0]; - struct tty_struct *tty = NULL; struct uart_icount *icount; int lines_rx[DZ_NB_PORT] = { [0 ... DZ_NB_PORT - 1] = 0 }; unsigned char ch, flag; @@ -197,7 +196,6 @@ static inline void dz_receive_chars(struct dz_mux *mux) while ((status = dz_in(dport, DZ_RBUF)) & DZ_DVAL) { dport = &mux->dport[LINE(status)]; uport = &dport->port; - tty = uport->state->port.tty; /* point to the proper dev */ ch = UCHAR(status); /* grab the char */ flag = TTY_NORMAL; @@ -249,7 +247,7 @@ static inline void dz_receive_chars(struct dz_mux *mux) } for (i = 0; i < DZ_NB_PORT; i++) if (lines_rx[i]) - tty_flip_buffer_push(mux->dport[i].port.state->port.tty); + tty_flip_buffer_push(&mux->dport[i].port.state->port); } /* diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c index bdf67b0cb8b6..de14bd7dce10 100644 --- a/drivers/tty/serial/efm32-uart.c +++ b/drivers/tty/serial/efm32-uart.c @@ -249,12 +249,9 @@ static irqreturn_t efm32_uart_rxirq(int irq, void *data) int handled = IRQ_NONE; struct uart_port *port = &efm_port->port; struct tty_port *tport = &port->state->port; - struct tty_struct *tty; spin_lock(&port->lock); - tty = tty_kref_get(tport->tty); - if (irqflag & UARTn_IF_RXDATAV) { efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC); efm32_uart_rx_chars(efm_port); @@ -270,10 +267,7 @@ static irqreturn_t efm32_uart_rxirq(int irq, void *data) handled = IRQ_HANDLED; } - if (tty) { - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + tty_flip_buffer_push(tport); spin_unlock(&port->lock); diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c index 54903ee5e5ab..bc9e6b017b05 100644 --- a/drivers/tty/serial/icom.c +++ b/drivers/tty/serial/icom.c @@ -735,7 +735,6 @@ static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port) { short int count, rcv_buff; struct tty_port *port = &icom_port->uart_port.state->port; - struct tty_struct *tty = port->tty; unsigned short int status; struct uart_icount *icount; unsigned long offset; @@ -835,7 +834,7 @@ ignore_char: status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags); } icom_port->next_rcv = rcv_buff; - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); } static void process_interrupt(u16 port_int_reg, diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c index 4bc6e47890b4..6a6668bbb330 100644 --- a/drivers/tty/serial/ifx6x60.c +++ b/drivers/tty/serial/ifx6x60.c @@ -669,12 +669,8 @@ static const struct tty_operations ifx_spi_serial_ops = { static void ifx_spi_insert_flip_string(struct ifx_spi_device *ifx_dev, unsigned char *chars, size_t size) { - struct tty_struct *tty = tty_port_tty_get(&ifx_dev->tty_port); - if (!tty) - return; tty_insert_flip_string(&ifx_dev->tty_port, chars, size); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&ifx_dev->tty_port); } /** diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index f60c4028b6e1..be26345bf6a4 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -518,7 +518,6 @@ static irqreturn_t imx_rxint(int irq, void *dev_id) unsigned int rx, flg, ignored = 0; struct tty_struct *tty = sport->port.state->port.tty; struct tty_port *port = &sport->port.state->port; - struct tty_struct *tty = port->tty; unsigned long flags, temp; spin_lock_irqsave(&sport->port.lock, flags); @@ -576,7 +575,7 @@ static irqreturn_t imx_rxint(int irq, void *dev_id) out: spin_unlock_irqrestore(&sport->port.lock, flags); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/ioc3_serial.c b/drivers/tty/serial/ioc3_serial.c index edbdc4e45075..6e4c715c5d26 100644 --- a/drivers/tty/serial/ioc3_serial.c +++ b/drivers/tty/serial/ioc3_serial.c @@ -1393,7 +1393,6 @@ static inline int do_read(struct uart_port *the_port, char *buf, int len) */ static int receive_chars(struct uart_port *the_port) { - struct tty_struct *tty; unsigned char ch[MAX_CHARS]; int read_count = 0, read_room, flip = 0; struct uart_state *state = the_port->state; @@ -1403,14 +1402,11 @@ static int receive_chars(struct uart_port *the_port) /* Make sure all the pointers are "good" ones */ if (!state) return 0; - if (!state->port.tty) - return 0; if (!(port->ip_flags & INPUT_ENABLE)) return 0; spin_lock_irqsave(&the_port->lock, pflags); - tty = state->port.tty; read_count = do_read(the_port, ch, MAX_CHARS); if (read_count > 0) { @@ -1422,7 +1418,7 @@ static int receive_chars(struct uart_port *the_port) spin_unlock_irqrestore(&the_port->lock, pflags); if (flip) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&state->port); return read_count; } diff --git a/drivers/tty/serial/ioc4_serial.c b/drivers/tty/serial/ioc4_serial.c index 86f64ed89b45..e2520abcb1c4 100644 --- a/drivers/tty/serial/ioc4_serial.c +++ b/drivers/tty/serial/ioc4_serial.c @@ -2340,7 +2340,6 @@ static inline int do_read(struct uart_port *the_port, unsigned char *buf, */ static void receive_chars(struct uart_port *the_port) { - struct tty_struct *tty; unsigned char ch[IOC4_MAX_CHARS]; int read_count, request_count = IOC4_MAX_CHARS; struct uart_icount *icount; @@ -2350,11 +2349,8 @@ static void receive_chars(struct uart_port *the_port) /* Make sure all the pointers are "good" ones */ if (!state) return; - if (!state->port.tty) - return; spin_lock_irqsave(&the_port->lock, pflags); - tty = state->port.tty; request_count = tty_buffer_request_room(&state->port, IOC4_MAX_CHARS); @@ -2369,7 +2365,7 @@ static void receive_chars(struct uart_port *the_port) spin_unlock_irqrestore(&the_port->lock, pflags); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&state->port); } /** diff --git a/drivers/tty/serial/jsm/jsm_tty.c b/drivers/tty/serial/jsm/jsm_tty.c index c9ce00dd1f8a..00f250ae14c5 100644 --- a/drivers/tty/serial/jsm/jsm_tty.c +++ b/drivers/tty/serial/jsm/jsm_tty.c @@ -654,7 +654,7 @@ void jsm_input(struct jsm_channel *ch) spin_unlock_irqrestore(&ch->ch_lock, lock_flags); /* Tell the tty layer its okay to "eat" the data now */ - tty_flip_buffer_push(tp); + tty_flip_buffer_push(port); jsm_dbg(IOCTL, &ch->ch_bd->pci_dev, "finish\n"); } diff --git a/drivers/tty/serial/kgdb_nmi.c b/drivers/tty/serial/kgdb_nmi.c index ba2ef627d9c6..26a50b0c868b 100644 --- a/drivers/tty/serial/kgdb_nmi.c +++ b/drivers/tty/serial/kgdb_nmi.c @@ -202,7 +202,6 @@ bool kgdb_nmi_poll_knock(void) static void kgdb_nmi_tty_receiver(unsigned long data) { struct kgdb_nmi_tty_priv *priv = (void *)data; - struct tty_struct *tty; char ch; tasklet_schedule(&priv->tlet); @@ -210,16 +209,9 @@ static void kgdb_nmi_tty_receiver(unsigned long data) if (likely(!kgdb_nmi_tty_enabled || !kfifo_len(&priv->fifo))) return; - /* Port is there, but tty might be hung up, check. */ - tty = tty_port_tty_get(kgdb_nmi_port); - if (!tty) - return; - while (kfifo_out(&priv->fifo, &ch, 1)) tty_insert_flip_char(&priv->port, ch, TTY_NORMAL); - tty_flip_buffer_push(priv->port.tty); - - tty_kref_put(tty); + tty_flip_buffer_push(&priv->port); } static int kgdb_nmi_tty_activate(struct tty_port *port, struct tty_struct *tty) diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c index 1933fe3c98dd..15733da757c6 100644 --- a/drivers/tty/serial/lantiq.c +++ b/drivers/tty/serial/lantiq.c @@ -163,21 +163,15 @@ static int lqasc_rx_chars(struct uart_port *port) { struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tty_port_tty_get(tport); unsigned int ch = 0, rsr = 0, fifocnt; - if (!tty) { - dev_dbg(port->dev, "%s:tty is busy now", __func__); - return -EBUSY; - } - fifocnt = - ltq_r32(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_RXFFLMASK; + fifocnt = ltq_r32(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_RXFFLMASK; while (fifocnt--) { u8 flag = TTY_NORMAL; ch = ltq_r8(port->membase + LTQ_ASC_RBUF); rsr = (ltq_r32(port->membase + LTQ_ASC_STATE) & ASCSTATE_ANY) | UART_DUMMY_UER_RX; - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); port->icount.rx++; /* @@ -219,9 +213,10 @@ lqasc_rx_chars(struct uart_port *port) */ tty_insert_flip_char(tport, 0, TTY_OVERRUN); } + if (ch != 0) - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(tport); + return 0; } diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c index 5cd180564c03..c8448e6f52e5 100644 --- a/drivers/tty/serial/lpc32xx_hs.c +++ b/drivers/tty/serial/lpc32xx_hs.c @@ -259,16 +259,6 @@ static void __serial_lpc32xx_rx(struct uart_port *port) { struct tty_port *tport = &port->state->port; unsigned int tmp, flag; - struct tty_struct *tty = tty_port_tty_get(tport); - - if (!tty) { - /* Discard data: no tty available */ - while (!(readl(LPC32XX_HSUART_FIFO(port->membase)) & - LPC32XX_HSU_RX_EMPTY)) - ; - - return; - } /* Read data from FIFO and push into terminal */ tmp = readl(LPC32XX_HSUART_FIFO(port->membase)); @@ -289,8 +279,7 @@ static void __serial_lpc32xx_rx(struct uart_port *port) tmp = readl(LPC32XX_HSUART_FIFO(port->membase)); } - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(tport); } static void __serial_lpc32xx_tx(struct uart_port *port) @@ -367,8 +356,7 @@ static irqreturn_t serial_lpc32xx_interrupt(int irq, void *dev_id) /* Data received? */ if (status & (LPC32XX_HSU_RX_TIMEOUT_INT | LPC32XX_HSU_RX_TRIG_INT)) { __serial_lpc32xx_rx(port); - if (tty) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); } /* Transmit data request? */ diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c index 2e9a390f2ac4..bb1afa0922e1 100644 --- a/drivers/tty/serial/m32r_sio.c +++ b/drivers/tty/serial/m32r_sio.c @@ -301,7 +301,6 @@ static void m32r_sio_enable_ms(struct uart_port *port) static void receive_chars(struct uart_sio_port *up, int *status) { struct tty_port *port = &up->port.state->port; - struct tty_struct *tty = tport->tty; unsigned char ch; unsigned char flag; int max_count = 256; @@ -369,7 +368,7 @@ static void receive_chars(struct uart_sio_port *up, int *status) ignore_char: *status = serial_in(up, UART_LSR); } while ((*status & UART_LSR_DR) && (max_count-- > 0)); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); } static void transmit_chars(struct uart_sio_port *up) diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c index e238e80cd981..791e1dfb8b11 100644 --- a/drivers/tty/serial/max3100.c +++ b/drivers/tty/serial/max3100.c @@ -311,8 +311,8 @@ static void max3100_work(struct work_struct *w) } } - if (rxchars > 16 && s->port.state->port.tty != NULL) { - tty_flip_buffer_push(s->port.state->port.tty); + if (rxchars > 16) { + tty_flip_buffer_push(&s->port.state->port); rxchars = 0; } if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) @@ -324,8 +324,8 @@ static void max3100_work(struct work_struct *w) (!uart_circ_empty(xmit) && !uart_tx_stopped(&s->port)))); - if (rxchars > 0 && s->port.state->port.tty != NULL) - tty_flip_buffer_push(s->port.state->port.tty); + if (rxchars > 0) + tty_flip_buffer_push(&s->port.state->port); } static irqreturn_t max3100_irq(int irqno, void *dev_id) diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index a801f6872cad..0c2422cb04ea 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -460,10 +460,6 @@ static int max310x_set_ref_clk(struct max310x_port *s) static void max310x_handle_rx(struct max310x_port *s, unsigned int rxlen) { unsigned int sts = 0, ch = 0, flag; - struct tty_struct *tty = tty_port_tty_get(&s->port.state->port); - - if (!tty) - return; if (unlikely(rxlen >= MAX310X_FIFO_SIZE)) { dev_warn(s->port.dev, "Possible RX FIFO overrun %d\n", rxlen); @@ -516,9 +512,7 @@ static void max310x_handle_rx(struct max310x_port *s, unsigned int rxlen) ch, flag); } - tty_flip_buffer_push(tty); - - tty_kref_put(tty); + tty_flip_buffer_push(&s->port.state->port); } static void max310x_handle_tx(struct max310x_port *s) diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c index fcd56ab6053f..7ed99274572f 100644 --- a/drivers/tty/serial/mcf.c +++ b/drivers/tty/serial/mcf.c @@ -310,7 +310,7 @@ static void mcf_rx_chars(struct mcf_uart *pp) uart_insert_char(port, status, MCFUART_USR_RXOVERRUN, ch, flag); } - tty_flip_buffer_push(port->state->port.tty); + tty_flip_buffer_push(&port->state->port); } /****************************************************************************/ diff --git a/drivers/tty/serial/mfd.c b/drivers/tty/serial/mfd.c index 60d585ab4870..5f4765a7a5c5 100644 --- a/drivers/tty/serial/mfd.c +++ b/drivers/tty/serial/mfd.c @@ -388,12 +388,8 @@ void hsu_dma_rx(struct uart_hsu_port *up, u32 int_sts) struct hsu_dma_chan *chan = up->rxc; struct uart_port *port = &up->port; struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; int count; - if (!tty) - return; - /* * First need to know how many is already transferred, * then check if its a timeout DMA irq, and return @@ -438,7 +434,7 @@ void hsu_dma_rx(struct uart_hsu_port *up, u32 int_sts) | (0x1 << 16) | (0x1 << 24) /* timeout bit, see HSU Errata 1 */ ); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); chan_writel(chan, HSU_CH_CR, 0x3); @@ -461,13 +457,9 @@ static void serial_hsu_stop_rx(struct uart_port *port) static inline void receive_chars(struct uart_hsu_port *up, int *status) { - struct tty_struct *tty = up->port.state->port.tty; unsigned int ch, flag; unsigned int max_count = 256; - if (!tty) - return; - do { ch = serial_in(up, UART_RX); flag = TTY_NORMAL; @@ -523,7 +515,7 @@ static inline void receive_chars(struct uart_hsu_port *up, int *status) ignore_char: *status = serial_in(up, UART_LSR); } while ((*status & UART_LSR_DR) && max_count--); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&up->port.state->port); } static void transmit_chars(struct uart_hsu_port *up) diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index 0145aeb7721c..c0e1fad51be7 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -942,7 +942,6 @@ static inline int mpc52xx_uart_int_rx_chars(struct uart_port *port) { struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; unsigned char ch, flag; unsigned short status; @@ -1000,7 +999,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port) } spin_unlock(&port->lock); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); spin_lock(&port->lock); return psc_ops->raw_rx_rdy(port); diff --git a/drivers/tty/serial/mpsc.c b/drivers/tty/serial/mpsc.c index 6f2d2ceb326a..bc24f4931670 100644 --- a/drivers/tty/serial/mpsc.c +++ b/drivers/tty/serial/mpsc.c @@ -938,7 +938,6 @@ static int mpsc_rx_intr(struct mpsc_port_info *pi) { struct mpsc_rx_desc *rxre; struct tty_port *port = &pi->port.state->port; - struct tty_struct *tty = port->tty; u32 cmdstat, bytes_in, i; int rc = 0; u8 *bp; @@ -971,7 +970,7 @@ static int mpsc_rx_intr(struct mpsc_port_info *pi) /* Following use of tty struct directly is deprecated */ if (tty_buffer_request_room(port, bytes_in) < bytes_in) { if (port->low_latency) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); /* * If this failed then we will throw away the bytes * but must do so to clear interrupts. @@ -1081,7 +1080,7 @@ next_frame: if ((readl(pi->sdma_base + SDMA_SDCM) & SDMA_SDCM_ERD) == 0) mpsc_start_rx(pi); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); return rc; } diff --git a/drivers/tty/serial/mrst_max3110.c b/drivers/tty/serial/mrst_max3110.c index 4632db7a24b7..f641c232beca 100644 --- a/drivers/tty/serial/mrst_max3110.c +++ b/drivers/tty/serial/mrst_max3110.c @@ -340,7 +340,6 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len) { struct uart_port *port = &max->port; struct tty_port *tport; - struct tty_struct *tty; char buf[M3110_RX_FIFO_DEPTH]; int r, w, usable; @@ -349,9 +348,6 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len) return 0; tport = &port->state->port; - tty = tty_port_tty_get(tport); - if (!tty) - return 0; for (r = 0, w = 0; r < len; r++) { if (str[r] & MAX3110_BREAK && @@ -366,10 +362,8 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len) } } - if (!w) { - tty_kref_put(tty); + if (!w) return 0; - } for (r = 0; w; r += usable, w -= usable) { usable = tty_buffer_request_room(tport, w); @@ -378,8 +372,7 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len) port->icount.rx += usable; } } - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(tport); return r; } diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index cb787c0e279a..b11e99797fd8 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -92,7 +92,6 @@ static void msm_enable_ms(struct uart_port *port) static void handle_rx_dm(struct uart_port *port, unsigned int misr) { struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; unsigned int sr; int count = 0; struct msm_port *msm_port = UART_TO_MSM(port); @@ -138,7 +137,7 @@ static void handle_rx_dm(struct uart_port *port, unsigned int misr) count -= 4; } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); if (misr & (UART_IMR_RXSTALE)) msm_write(port, UART_CR_CMD_RESET_STALE_INT, UART_CR); msm_write(port, 0xFFFFFF, UARTDM_DMRX); @@ -148,7 +147,6 @@ static void handle_rx_dm(struct uart_port *port, unsigned int misr) static void handle_rx(struct uart_port *port) { struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; unsigned int sr; /* @@ -191,7 +189,7 @@ static void handle_rx(struct uart_port *port) tty_insert_flip_char(tport, c, flag); } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); } static void reset_dm_count(struct uart_port *port) diff --git a/drivers/tty/serial/msm_serial_hs.c b/drivers/tty/serial/msm_serial_hs.c index c356ffff3c71..4a942c78347e 100644 --- a/drivers/tty/serial/msm_serial_hs.c +++ b/drivers/tty/serial/msm_serial_hs.c @@ -981,9 +981,8 @@ static void msm_hs_tty_flip_buffer_work(struct work_struct *work) { struct msm_hs_port *msm_uport = container_of(work, struct msm_hs_port, rx.tty_work); - struct tty_struct *tty = msm_uport->uport.state->port.tty; - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&msm_uport->uport.state->port); } /* diff --git a/drivers/tty/serial/msm_smd_tty.c b/drivers/tty/serial/msm_smd_tty.c index b43b4ec39269..e722ff163d91 100644 --- a/drivers/tty/serial/msm_smd_tty.c +++ b/drivers/tty/serial/msm_smd_tty.c @@ -80,7 +80,7 @@ static void smd_tty_notify(void *priv, unsigned event) pr_err("OOPS - smd_tty_buffer mismatch?!"); } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&info->port); } /* XXX only when writable and necessary */ diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c index 83b21686020e..7fd6aaaacd8e 100644 --- a/drivers/tty/serial/mux.c +++ b/drivers/tty/serial/mux.c @@ -244,7 +244,6 @@ static void mux_read(struct uart_port *port) { struct tty_port *tport = &port->state->port; int data; - struct tty_struct *tty = tport->tty; __u32 start_count = port->icount.rx; while(1) { @@ -270,9 +269,8 @@ static void mux_read(struct uart_port *port) tty_insert_flip_char(tport, data & 0xFF, TTY_NORMAL); } - if (start_count != port->icount.rx) { - tty_flip_buffer_push(tty); - } + if (start_count != port->icount.rx) + tty_flip_buffer_push(tport); } /** diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index 37a0046ef531..df0ba32f88ad 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -364,7 +364,6 @@ out: static void mxs_auart_rx_chars(struct mxs_auart_port *s) { - struct tty_struct *tty = s->port.state->port.tty; u32 stat = 0; for (;;) { @@ -375,7 +374,7 @@ static void mxs_auart_rx_chars(struct mxs_auart_port *s) } writel(stat, s->port.membase + AUART_STAT); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&s->port.state->port); } static int mxs_auart_request_port(struct uart_port *u) @@ -458,7 +457,6 @@ static void dma_rx_callback(void *arg) { struct mxs_auart_port *s = (struct mxs_auart_port *) arg; struct tty_port *port = &s->port.state->port; - struct tty_struct *tty = port->tty; int count; u32 stat; @@ -472,7 +470,7 @@ static void dma_rx_callback(void *arg) tty_insert_flip_string(port, s->rx_dma_buf, count); writel(stat, s->port.membase + AUART_STAT); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); /* start the next DMA for RX. */ mxs_auart_dma_prep_rx(s); diff --git a/drivers/tty/serial/netx-serial.c b/drivers/tty/serial/netx-serial.c index d40da78e7c85..b9a40ed70be2 100644 --- a/drivers/tty/serial/netx-serial.c +++ b/drivers/tty/serial/netx-serial.c @@ -199,7 +199,6 @@ static void netx_txint(struct uart_port *port) static void netx_rxint(struct uart_port *port) { unsigned char rx, flg, status; - struct tty_struct *tty = port->state->port.tty; while (!(readl(port->membase + UART_FR) & FR_RXFE)) { rx = readl(port->membase + UART_DR); @@ -237,8 +236,7 @@ static void netx_rxint(struct uart_port *port) uart_insert_char(port, status, SR_OE, rx, flg); } - tty_flip_buffer_push(tty); - return; + tty_flip_buffer_push(&port->state->port); } static irqreturn_t netx_int(int irq, void *dev_id) diff --git a/drivers/tty/serial/nwpserial.c b/drivers/tty/serial/nwpserial.c index 10d64a3697fb..77287c54f331 100644 --- a/drivers/tty/serial/nwpserial.c +++ b/drivers/tty/serial/nwpserial.c @@ -129,7 +129,6 @@ static irqreturn_t nwpserial_interrupt(int irq, void *dev_id) { struct nwpserial_port *up = dev_id; struct tty_port *port = &up->port.state->port; - struct tty_struct *tty = port->tty; irqreturn_t ret; unsigned int iir; unsigned char ch; @@ -150,7 +149,7 @@ static irqreturn_t nwpserial_interrupt(int irq, void *dev_id) tty_insert_flip_char(port, ch, TTY_NORMAL); } while (dcr_read(up->dcr_host, UART_LSR) & UART_LSR_DR); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(port); ret = IRQ_HANDLED; /* clear interrupt */ diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index ec90651d661a..6f3dbf740f05 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -483,7 +483,6 @@ static void serial_omap_rdi(struct uart_omap_port *up, unsigned int lsr) static irqreturn_t serial_omap_irq(int irq, void *dev_id) { struct uart_omap_port *up = dev_id; - struct tty_struct *tty = up->port.state->port.tty; unsigned int iir, lsr; unsigned int type; irqreturn_t ret = IRQ_NONE; @@ -530,7 +529,7 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id) spin_unlock(&up->port.lock); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&up->port.state->port); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 967f1cb311f3..8b40a1fc9681 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -593,17 +593,9 @@ static int push_rx(struct eg20t_port *priv, const unsigned char *buf, { struct uart_port *port = &priv->port; struct tty_port *tport = &port->state->port; - struct tty_struct *tty; - - tty = tty_port_tty_get(tport); - if (!tty) { - dev_dbg(priv->port.dev, "%s:tty is busy now", __func__); - return -EBUSY; - } tty_insert_flip_string(tport, buf, size); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(tport); return 0; } @@ -744,19 +736,12 @@ static void pch_dma_rx_complete(void *arg) { struct eg20t_port *priv = arg; struct uart_port *port = &priv->port; - struct tty_struct *tty = tty_port_tty_get(&port->state->port); int count; - if (!tty) { - dev_dbg(priv->port.dev, "%s:tty is busy now", __func__); - return; - } - dma_sync_sg_for_cpu(port->dev, &priv->sg_rx, 1, DMA_FROM_DEVICE); count = dma_push_rx(priv, priv->trigger_level); if (count) - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->state->port); async_tx_ack(priv->desc_rx); pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT | PCH_UART_HAL_RX_ERR_INT); diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index 73a3f295e7c4..b1785f58b6e3 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -227,21 +227,19 @@ static void pmz_interrupt_control(struct uart_pmac_port *uap, int enable) write_zsreg(uap, R1, uap->curregs[1]); } -static struct tty_struct *pmz_receive_chars(struct uart_pmac_port *uap) +static bool pmz_receive_chars(struct uart_pmac_port *uap) { struct tty_port *port; - struct tty_struct *tty = NULL; unsigned char ch, r1, drop, error, flag; int loops = 0; /* Sanity check, make sure the old bug is no longer happening */ - if (uap->port.state == NULL || uap->port.state->port.tty == NULL) { + if (uap->port.state == NULL) { WARN_ON(1); (void)read_zsdata(uap); - return NULL; + return false; } port = &uap->port.state->port; - tty = port->tty; /* TOCTOU above */ while (1) { error = 0; @@ -330,11 +328,11 @@ static struct tty_struct *pmz_receive_chars(struct uart_pmac_port *uap) break; } - return tty; + return true; flood: pmz_interrupt_control(uap, 0); pmz_error("pmz: rx irq flood !\n"); - return tty; + return true; } static void pmz_status_handle(struct uart_pmac_port *uap) @@ -455,7 +453,7 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id) struct uart_pmac_port *uap_a; struct uart_pmac_port *uap_b; int rc = IRQ_NONE; - struct tty_struct *tty; + bool push; u8 r3; uap_a = pmz_get_port_A(uap); @@ -468,7 +466,7 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id) pmz_debug("irq, r3: %x\n", r3); #endif /* Channel A */ - tty = NULL; + push = false; if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { if (!ZS_IS_OPEN(uap_a)) { pmz_debug("ChanA interrupt while not open !\n"); @@ -479,21 +477,21 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id) if (r3 & CHAEXT) pmz_status_handle(uap_a); if (r3 & CHARxIP) - tty = pmz_receive_chars(uap_a); + push = pmz_receive_chars(uap_a); if (r3 & CHATxIP) pmz_transmit_chars(uap_a); rc = IRQ_HANDLED; } skip_a: spin_unlock(&uap_a->port.lock); - if (tty != NULL) - tty_flip_buffer_push(tty); + if (push) + tty_flip_buffer_push(&uap->port.state->port); if (!uap_b) goto out; spin_lock(&uap_b->port.lock); - tty = NULL; + push = false; if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { if (!ZS_IS_OPEN(uap_b)) { pmz_debug("ChanB interrupt while not open !\n"); @@ -504,15 +502,15 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id) if (r3 & CHBEXT) pmz_status_handle(uap_b); if (r3 & CHBRxIP) - tty = pmz_receive_chars(uap_b); + push = pmz_receive_chars(uap_b); if (r3 & CHBTxIP) pmz_transmit_chars(uap_b); rc = IRQ_HANDLED; } skip_b: spin_unlock(&uap_b->port.lock); - if (tty != NULL) - tty_flip_buffer_push(tty); + if (push) + tty_flip_buffer_push(&uap->port.state->port); out: return rc; diff --git a/drivers/tty/serial/pnx8xxx_uart.c b/drivers/tty/serial/pnx8xxx_uart.c index 0aa75a97531c..7e277a5384a7 100644 --- a/drivers/tty/serial/pnx8xxx_uart.c +++ b/drivers/tty/serial/pnx8xxx_uart.c @@ -181,7 +181,6 @@ static void pnx8xxx_enable_ms(struct uart_port *port) static void pnx8xxx_rx_chars(struct pnx8xxx_port *sport) { - struct tty_struct *tty = sport->port.state->port.tty; unsigned int status, ch, flg; status = FIFO_TO_SM(serial_in(sport, PNX8XXX_FIFO)) | @@ -238,7 +237,7 @@ static void pnx8xxx_rx_chars(struct pnx8xxx_port *sport) status = FIFO_TO_SM(serial_in(sport, PNX8XXX_FIFO)) | ISTAT_TO_SM(serial_in(sport, PNX8XXX_ISTAT)); } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&sport->port.state->port); } static void pnx8xxx_tx_chars(struct pnx8xxx_port *sport) diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index 2764828251f5..3b671bc3f966 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -98,7 +98,6 @@ static void serial_pxa_stop_rx(struct uart_port *port) static inline void receive_chars(struct uart_pxa_port *up, int *status) { - struct tty_struct *tty = up->port.state->port.tty; unsigned int ch, flag; int max_count = 256; @@ -168,7 +167,7 @@ static inline void receive_chars(struct uart_pxa_port *up, int *status) ignore_char: *status = serial_in(up, UART_LSR); } while ((*status & UART_LSR_DR) && (max_count-- > 0)); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&up->port.state->port); /* work around Errata #20 according to * Intel(R) PXA27x Processor Family diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c index 5d4b9b449b4a..af6b3e3ad24d 100644 --- a/drivers/tty/serial/sa1100.c +++ b/drivers/tty/serial/sa1100.c @@ -188,7 +188,6 @@ static void sa1100_enable_ms(struct uart_port *port) static void sa1100_rx_chars(struct sa1100_port *sport) { - struct tty_struct *tty = sport->port.state->port.tty; unsigned int status, ch, flg; status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) | @@ -233,7 +232,7 @@ sa1100_rx_chars(struct sa1100_port *sport) status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) | UTSR0_TO_SM(UART_GET_UTSR0(sport)); } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&sport->port.state->port); } static void sa1100_tx_chars(struct sa1100_port *sport) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 0684529eb2ad..3aa3c4c83f8b 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -220,7 +220,6 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id) { struct s3c24xx_uart_port *ourport = dev_id; struct uart_port *port = &ourport->port; - struct tty_struct *tty = port->state->port.tty; unsigned int ufcon, ch, flag, ufstat, uerstat; unsigned long flags; int max_count = 64; @@ -298,7 +297,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id) ignore_char: continue; } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); out: spin_unlock_irqrestore(&port->lock, flags); diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c index f76b1688c5c8..a7cdec2962dd 100644 --- a/drivers/tty/serial/sb1250-duart.c +++ b/drivers/tty/serial/sb1250-duart.c @@ -384,7 +384,7 @@ static void sbd_receive_chars(struct sbd_port *sport) uart_insert_char(uport, status, M_DUART_OVRUN_ERR, ch, flag); } - tty_flip_buffer_push(uport->state->port.tty); + tty_flip_buffer_push(&uport->state->port); } static void sbd_transmit_chars(struct sbd_port *sport) diff --git a/drivers/tty/serial/sc26xx.c b/drivers/tty/serial/sc26xx.c index 0cd0e4ac12a6..c9735680762d 100644 --- a/drivers/tty/serial/sc26xx.c +++ b/drivers/tty/serial/sc26xx.c @@ -136,20 +136,17 @@ static void sc26xx_disable_irq(struct uart_port *port, int mask) WRITE_SC(port, IMR, up->imr); } -static struct tty_struct *receive_chars(struct uart_port *port) +static bool receive_chars(struct uart_port *port) { struct tty_port *tport = NULL; - struct tty_struct *tty = NULL; int limit = 10000; unsigned char ch; char flag; u8 status; /* FIXME what is this trying to achieve? */ - if (port->state != NULL) { /* Unopened serial console */ + if (port->state != NULL) /* Unopened serial console */ tport = &port->state->port; - tty = tport->tty; - } while (limit-- > 0) { status = READ_SC_PORT(port, SR); @@ -191,7 +188,7 @@ static struct tty_struct *receive_chars(struct uart_port *port) tty_insert_flip_char(tport, ch, flag); } - return tty; + return !!tport; } static void transmit_chars(struct uart_port *port) @@ -221,36 +218,36 @@ static void transmit_chars(struct uart_port *port) static irqreturn_t sc26xx_interrupt(int irq, void *dev_id) { struct uart_sc26xx_port *up = dev_id; - struct tty_struct *tty; unsigned long flags; + bool push; u8 isr; spin_lock_irqsave(&up->port[0].lock, flags); - tty = NULL; + push = false; isr = READ_SC(&up->port[0], ISR); if (isr & ISR_TXRDYA) transmit_chars(&up->port[0]); if (isr & ISR_RXRDYA) - tty = receive_chars(&up->port[0]); + push = receive_chars(&up->port[0]); spin_unlock(&up->port[0].lock); - if (tty) - tty_flip_buffer_push(tty); + if (push) + tty_flip_buffer_push(&up->port[0].state->port); spin_lock(&up->port[1].lock); - tty = NULL; + push = false; if (isr & ISR_TXRDYB) transmit_chars(&up->port[1]); if (isr & ISR_RXRDYB) - tty = receive_chars(&up->port[1]); + push = receive_chars(&up->port[1]); spin_unlock_irqrestore(&up->port[1].lock, flags); - if (tty) - tty_flip_buffer_push(tty); + if (push) + tty_flip_buffer_push(&up->port[1].state->port); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index 418b495e3233..2ced871becff 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -285,10 +285,6 @@ static void sccnxp_handle_rx(struct uart_port *port) { u8 sr; unsigned int ch, flag; - struct tty_struct *tty = tty_port_tty_get(&port->state->port); - - if (!tty) - return; for (;;) { sr = sccnxp_port_read(port, SCCNXP_SR_REG); @@ -333,9 +329,7 @@ static void sccnxp_handle_rx(struct uart_port *port) uart_insert_char(port, sr, SR_OVR, ch, flag); } - tty_flip_buffer_push(tty); - - tty_kref_put(tty); + tty_flip_buffer_push(&port->state->port); } static void sccnxp_handle_tx(struct uart_port *port) diff --git a/drivers/tty/serial/serial_ks8695.c b/drivers/tty/serial/serial_ks8695.c index 9bd004f9da89..e1caa99e3d3b 100644 --- a/drivers/tty/serial/serial_ks8695.c +++ b/drivers/tty/serial/serial_ks8695.c @@ -153,7 +153,6 @@ static void ks8695uart_disable_ms(struct uart_port *port) static irqreturn_t ks8695uart_rx_chars(int irq, void *dev_id) { struct uart_port *port = dev_id; - struct tty_struct *tty = port->state->port.tty; unsigned int status, ch, lsr, flg, max_count = 256; status = UART_GET_LSR(port); /* clears pending LSR interrupts */ @@ -200,7 +199,7 @@ static irqreturn_t ks8695uart_rx_chars(int irq, void *dev_id) ignore_char: status = UART_GET_LSR(port); } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c index b52b21aeb250..fe48a0c2b4ca 100644 --- a/drivers/tty/serial/serial_txx9.c +++ b/drivers/tty/serial/serial_txx9.c @@ -277,7 +277,6 @@ static void serial_txx9_initialize(struct uart_port *port) static inline void receive_chars(struct uart_txx9_port *up, unsigned int *status) { - struct tty_struct *tty = up->port.state->port.tty; unsigned char ch; unsigned int disr = *status; int max_count = 256; @@ -346,7 +345,7 @@ receive_chars(struct uart_txx9_port *up, unsigned int *status) disr = sio_in(up, TXX9_SIDISR); } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0)); spin_unlock(&up->port.lock); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&up->port.state->port); spin_lock(&up->port.lock); *status = disr; } diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index ecef748f5385..156418619949 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -597,7 +597,6 @@ static void sci_receive_chars(struct uart_port *port) { struct sci_port *sci_port = to_sci_port(port); struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; int i, count, copied = 0; unsigned short status; unsigned char flag; @@ -675,7 +674,7 @@ static void sci_receive_chars(struct uart_port *port) if (copied) { /* Tell the rest of the system the news. New characters! */ - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); } else { serial_port_in(port, SCxSR); /* dummy read */ serial_port_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); @@ -722,7 +721,6 @@ static int sci_handle_errors(struct uart_port *port) int copied = 0; unsigned short status = serial_port_in(port, SCxSR); struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; struct sci_port *s = to_sci_port(port); /* @@ -783,7 +781,7 @@ static int sci_handle_errors(struct uart_port *port) } if (copied) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); return copied; } @@ -791,7 +789,6 @@ static int sci_handle_errors(struct uart_port *port) static int sci_handle_fifo_overrun(struct uart_port *port) { struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; struct sci_port *s = to_sci_port(port); struct plat_sci_reg *reg; int copied = 0; @@ -806,7 +803,7 @@ static int sci_handle_fifo_overrun(struct uart_port *port) port->icount.overrun++; tty_insert_flip_char(tport, 0, TTY_OVERRUN); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); dev_notice(port->dev, "overrun error\n"); copied++; @@ -820,7 +817,6 @@ static int sci_handle_breaks(struct uart_port *port) int copied = 0; unsigned short status = serial_port_in(port, SCxSR); struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; struct sci_port *s = to_sci_port(port); if (uart_handle_break(port)) @@ -842,7 +838,7 @@ static int sci_handle_breaks(struct uart_port *port) } if (copied) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); copied += sci_handle_fifo_overrun(port); @@ -1299,7 +1295,6 @@ static void sci_dma_rx_complete(void *arg) { struct sci_port *s = arg; struct uart_port *port = &s->port; - struct tty_struct *tty = port->state->port.tty; unsigned long flags; int count; @@ -1314,7 +1309,7 @@ static void sci_dma_rx_complete(void *arg) spin_unlock_irqrestore(&port->lock, flags); if (count) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); schedule_work(&s->work_rx); } @@ -1408,7 +1403,6 @@ static void work_fn_rx(struct work_struct *work) if (dma_async_is_tx_complete(s->chan_rx, s->active_rx, NULL, NULL) != DMA_SUCCESS) { /* Handle incomplete DMA receive */ - struct tty_struct *tty = port->state->port.tty; struct dma_chan *chan = s->chan_rx; struct shdma_desc *sh_desc = container_of(desc, struct shdma_desc, async_tx); @@ -1424,7 +1418,7 @@ static void work_fn_rx(struct work_struct *work) spin_unlock_irqrestore(&port->lock, flags); if (count) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); sci_submit_rx(s); diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 142217cd01f4..8f3d6c091acc 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -206,11 +206,6 @@ static unsigned int sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count) { unsigned int ch, rx_count = 0; - struct tty_struct *tty; - - tty = tty_port_tty_get(&port->state->port); - if (!tty) - return -ENODEV; while (!(rd_regl(port, SIRFUART_RX_FIFO_STATUS) & SIRFUART_FIFOEMPTY_MASK(port))) { @@ -224,8 +219,7 @@ sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count) } port->icount.rx += rx_count; - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->state->port); return rx_count; } diff --git a/drivers/tty/serial/sn_console.c b/drivers/tty/serial/sn_console.c index 283232c64656..f51ffdc696fd 100644 --- a/drivers/tty/serial/sn_console.c +++ b/drivers/tty/serial/sn_console.c @@ -459,7 +459,6 @@ sn_receive_chars(struct sn_cons_port *port, unsigned long flags) { struct tty_port *tport = NULL; int ch; - struct tty_struct *tty; if (!port) { printk(KERN_ERR "sn_receive_chars - port NULL so can't receive\n"); @@ -474,11 +473,6 @@ sn_receive_chars(struct sn_cons_port *port, unsigned long flags) if (port->sc_port.state) { /* The serial_core stuffs are initialized, use them */ tport = &port->sc_port.state->port; - tty = tport->tty; - } - else { - /* Not registered yet - can't pass to tty layer. */ - tty = NULL; } while (port->sc_ops->sal_input_pending()) { @@ -518,15 +512,15 @@ sn_receive_chars(struct sn_cons_port *port, unsigned long flags) #endif /* CONFIG_MAGIC_SYSRQ */ /* record the character to pass up to the tty layer */ - if (tty) { + if (tport) { if (tty_insert_flip_char(tport, ch, TTY_NORMAL) == 0) break; } port->sc_port.icount.rx++; } - if (tty) - tty_flip_buffer_push(tty); + if (tport) + tty_flip_buffer_push(tport); } /** diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c index defe92b19e16..ba60708053e0 100644 --- a/drivers/tty/serial/sunhv.c +++ b/drivers/tty/serial/sunhv.c @@ -181,17 +181,17 @@ static struct sunhv_ops bywrite_ops = { static struct sunhv_ops *sunhv_ops = &bychar_ops; -static struct tty_struct *receive_chars(struct uart_port *port) +static struct tty_port *receive_chars(struct uart_port *port) { - struct tty_struct *tty = NULL; + struct tty_port *tport = NULL; if (port->state != NULL) /* Unopened serial console */ - tty = port->state->port.tty; + tport = &port->state->port; if (sunhv_ops->receive_chars(port)) sun_do_break(); - return tty; + return tport; } static void transmit_chars(struct uart_port *port) @@ -214,16 +214,16 @@ static void transmit_chars(struct uart_port *port) static irqreturn_t sunhv_interrupt(int irq, void *dev_id) { struct uart_port *port = dev_id; - struct tty_struct *tty; + struct tty_port *tport; unsigned long flags; spin_lock_irqsave(&port->lock, flags); - tty = receive_chars(port); + tport = receive_chars(port); transmit_chars(port); spin_unlock_irqrestore(&port->lock, flags); - if (tty) - tty_flip_buffer_push(tty); + if (tport) + tty_flip_buffer_push(tport); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c index 4abc4d43a8e8..8de2213664e0 100644 --- a/drivers/tty/serial/sunsab.c +++ b/drivers/tty/serial/sunsab.c @@ -107,22 +107,19 @@ static __inline__ void sunsab_cec_wait(struct uart_sunsab_port *up) udelay(1); } -static struct tty_struct * +static struct tty_port * receive_chars(struct uart_sunsab_port *up, union sab82532_irq_status *stat) { struct tty_port *port = NULL; - struct tty_struct *tty = NULL; unsigned char buf[32]; int saw_console_brk = 0; int free_fifo = 0; int count = 0; int i; - if (up->port.state != NULL) { /* Unopened serial console */ + if (up->port.state != NULL) /* Unopened serial console */ port = &up->port.state->port; - tty = port->tty; - } /* Read number of BYTES (Character + Status) available. */ if (stat->sreg.isr0 & SAB82532_ISR0_RPF) { @@ -139,7 +136,7 @@ receive_chars(struct uart_sunsab_port *up, if (stat->sreg.isr0 & SAB82532_ISR0_TIME) { sunsab_cec_wait(up); writeb(SAB82532_CMDR_RFRD, &up->regs->w.cmdr); - return tty; + return port; } if (stat->sreg.isr0 & SAB82532_ISR0_RFO) @@ -219,7 +216,7 @@ receive_chars(struct uart_sunsab_port *up, if (saw_console_brk) sun_do_break(); - return tty; + return port; } static void sunsab_stop_tx(struct uart_port *); @@ -302,7 +299,7 @@ static void check_status(struct uart_sunsab_port *up, static irqreturn_t sunsab_interrupt(int irq, void *dev_id) { struct uart_sunsab_port *up = dev_id; - struct tty_struct *tty; + struct tty_port *port = NULL; union sab82532_irq_status status; unsigned long flags; unsigned char gis; @@ -316,12 +313,11 @@ static irqreturn_t sunsab_interrupt(int irq, void *dev_id) if (gis & 2) status.sreg.isr1 = readb(&up->regs->r.isr1); - tty = NULL; if (status.stat) { if ((status.sreg.isr0 & (SAB82532_ISR0_TCD | SAB82532_ISR0_TIME | SAB82532_ISR0_RFO | SAB82532_ISR0_RPF)) || (status.sreg.isr1 & SAB82532_ISR1_BRK)) - tty = receive_chars(up, &status); + port = receive_chars(up, &status); if ((status.sreg.isr0 & SAB82532_ISR0_CDSC) || (status.sreg.isr1 & SAB82532_ISR1_CSC)) check_status(up, &status); @@ -331,8 +327,8 @@ static irqreturn_t sunsab_interrupt(int irq, void *dev_id) spin_unlock_irqrestore(&up->port.lock, flags); - if (tty) - tty_flip_buffer_push(tty); + if (port) + tty_flip_buffer_push(port); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c index 52325968b06c..e343d6670854 100644 --- a/drivers/tty/serial/sunsu.c +++ b/drivers/tty/serial/sunsu.c @@ -315,11 +315,10 @@ static void sunsu_enable_ms(struct uart_port *port) spin_unlock_irqrestore(&up->port.lock, flags); } -static struct tty_struct * +static void receive_chars(struct uart_sunsu_port *up, unsigned char *status) { struct tty_port *port = &up->port.state->port; - struct tty_struct *tty = port->tty; unsigned char ch, flag; int max_count = 256; int saw_console_brk = 0; @@ -391,8 +390,6 @@ receive_chars(struct uart_sunsu_port *up, unsigned char *status) if (saw_console_brk) sun_do_break(); - - return tty; } static void transmit_chars(struct uart_sunsu_port *up) @@ -461,20 +458,16 @@ static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id) spin_lock_irqsave(&up->port.lock, flags); do { - struct tty_struct *tty; - status = serial_inp(up, UART_LSR); - tty = NULL; if (status & UART_LSR_DR) - tty = receive_chars(up, &status); + receive_chars(up, &status); check_modem_status(up); if (status & UART_LSR_THRE) transmit_chars(up); spin_unlock_irqrestore(&up->port.lock, flags); - if (tty) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&up->port.state->port); spin_lock_irqsave(&up->port.lock, flags); diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c index 4a11be3849f6..27669ff3d446 100644 --- a/drivers/tty/serial/sunzilog.c +++ b/drivers/tty/serial/sunzilog.c @@ -323,19 +323,15 @@ static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up, } } -static struct tty_struct * +static struct tty_port * sunzilog_receive_chars(struct uart_sunzilog_port *up, struct zilog_channel __iomem *channel) { struct tty_port *port = NULL; - struct tty_struct *tty; unsigned char ch, r1, flag; - tty = NULL; - if (up->port.state != NULL) { /* Unopened serial console */ + if (up->port.state != NULL) /* Unopened serial console */ port = &up->port.state->port; - tty = port->tty; /* mouse => tty is NULL */ - } for (;;) { @@ -403,7 +399,7 @@ sunzilog_receive_chars(struct uart_sunzilog_port *up, tty_insert_flip_char(port, 0, TTY_OVERRUN); } - return tty; + return port; } static void sunzilog_status_handle(struct uart_sunzilog_port *up, @@ -536,21 +532,21 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id) while (up) { struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - struct tty_struct *tty; + struct tty_port *port; unsigned char r3; spin_lock(&up->port.lock); r3 = read_zsreg(channel, R3); /* Channel A */ - tty = NULL; + port = NULL; if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { writeb(RES_H_IUS, &channel->control); ZSDELAY(); ZS_WSYNC(channel); if (r3 & CHARxIP) - tty = sunzilog_receive_chars(up, channel); + port = sunzilog_receive_chars(up, channel); if (r3 & CHAEXT) sunzilog_status_handle(up, channel); if (r3 & CHATxIP) @@ -558,22 +554,22 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id) } spin_unlock(&up->port.lock); - if (tty) - tty_flip_buffer_push(tty); + if (port) + tty_flip_buffer_push(port); /* Channel B */ up = up->next; channel = ZILOG_CHANNEL_FROM_PORT(&up->port); spin_lock(&up->port.lock); - tty = NULL; + port = NULL; if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { writeb(RES_H_IUS, &channel->control); ZSDELAY(); ZS_WSYNC(channel); if (r3 & CHBRxIP) - tty = sunzilog_receive_chars(up, channel); + port = sunzilog_receive_chars(up, channel); if (r3 & CHBEXT) sunzilog_status_handle(up, channel); if (r3 & CHBTxIP) @@ -581,8 +577,8 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id) } spin_unlock(&up->port.lock); - if (tty) - tty_flip_buffer_push(tty); + if (port) + tty_flip_buffer_push(port); up = up->next; } diff --git a/drivers/tty/serial/timbuart.c b/drivers/tty/serial/timbuart.c index f40c634f7528..6818410a2bea 100644 --- a/drivers/tty/serial/timbuart.c +++ b/drivers/tty/serial/timbuart.c @@ -100,7 +100,7 @@ static void timbuart_rx_chars(struct uart_port *port) } spin_unlock(&port->lock); - tty_flip_buffer_push(port->state->port.tty); + tty_flip_buffer_push(tport); spin_lock(&port->lock); dev_dbg(port->dev, "%s - total read %d bytes\n", diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c index 5caf1f0ebc82..5486505e87c7 100644 --- a/drivers/tty/serial/uartlite.c +++ b/drivers/tty/serial/uartlite.c @@ -156,7 +156,7 @@ static irqreturn_t ulite_isr(int irq, void *dev_id) /* work done? */ if (n > 1) { - tty_flip_buffer_push(port->state->port.tty); + tty_flip_buffer_push(&port->state->port); return IRQ_HANDLED; } else { return IRQ_NONE; diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index 7a2378627fa5..7355303dad99 100644 --- a/drivers/tty/serial/ucc_uart.c +++ b/drivers/tty/serial/ucc_uart.c @@ -470,7 +470,6 @@ static void qe_uart_int_rx(struct uart_qe_port *qe_port) unsigned char ch, *cp; struct uart_port *port = &qe_port->port; struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tport->tty; struct qe_bd *bdp; u16 status; unsigned int flg; @@ -531,7 +530,7 @@ error_return: qe_port->rx_cur = bdp; /* Activate BH processing */ - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); return; diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c index 62ee0166bc65..f655997f44af 100644 --- a/drivers/tty/serial/vr41xx_siu.c +++ b/drivers/tty/serial/vr41xx_siu.c @@ -313,12 +313,10 @@ static void siu_break_ctl(struct uart_port *port, int ctl) static inline void receive_chars(struct uart_port *port, uint8_t *status) { - struct tty_struct *tty; uint8_t lsr, ch; char flag; int max_count = RX_MAX_COUNT; - tty = port->state->port.tty; lsr = *status; do { @@ -365,7 +363,7 @@ static inline void receive_chars(struct uart_port *port, uint8_t *status) lsr = siu_read(port, UART_LSR); } while ((lsr & UART_LSR_DR) && (max_count-- > 0)); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); *status = lsr; } diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c index 7f4112423f3d..f1a398c672fa 100644 --- a/drivers/tty/serial/vt8500_serial.c +++ b/drivers/tty/serial/vt8500_serial.c @@ -137,15 +137,6 @@ static void vt8500_enable_ms(struct uart_port *port) static void handle_rx(struct uart_port *port) { struct tty_port *tport = &port->state->port; - struct tty_struct *tty = tty_port_tty_get(tport); - if (!tty) { - /* Discard data: no tty available */ - int count = (vt8500_read(port, VT8500_URFIDX) & 0x1f00) >> 8; - u16 ch; - while (count--) - ch = readw(port->membase + VT8500_RXFIFO); - return; - } /* * Handle overrun @@ -178,8 +169,7 @@ static void handle_rx(struct uart_port *port) tty_insert_flip_char(tport, c, flag); } - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(tport); } static void handle_tx(struct uart_port *port) diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 9ab910370c56..82a3151e393c 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -147,15 +147,11 @@ static irqreturn_t xuartps_isr(int irq, void *dev_id) { struct uart_port *port = (struct uart_port *)dev_id; - struct tty_struct *tty; unsigned long flags; unsigned int isrstatus, numbytes; unsigned int data; char status = TTY_NORMAL; - /* Get the tty which could be NULL so don't assume it's valid */ - tty = tty_port_tty_get(&port->state->port); - spin_lock_irqsave(&port->lock, flags); /* Read the interrupt status register to determine which @@ -187,14 +183,11 @@ static irqreturn_t xuartps_isr(int irq, void *dev_id) } else if (isrstatus & XUARTPS_IXR_OVERRUN) port->icount.overrun++; - if (tty) - uart_insert_char(port, isrstatus, - XUARTPS_IXR_OVERRUN, data, - status); + uart_insert_char(port, isrstatus, XUARTPS_IXR_OVERRUN, + data, status); } spin_unlock(&port->lock); - if (tty) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->state->port); spin_lock(&port->lock); } @@ -237,7 +230,6 @@ static irqreturn_t xuartps_isr(int irq, void *dev_id) /* be sure to release the lock and tty before leaving */ spin_unlock_irqrestore(&port->lock, flags); - tty_kref_put(tty); return IRQ_HANDLED; } diff --git a/drivers/tty/serial/zs.c b/drivers/tty/serial/zs.c index 92c00b24d0df..6a169877109b 100644 --- a/drivers/tty/serial/zs.c +++ b/drivers/tty/serial/zs.c @@ -603,7 +603,7 @@ static void zs_receive_chars(struct zs_port *zport) uart_insert_char(uport, status, Rx_OVR, ch, flag); } - tty_flip_buffer_push(uport->state->port.tty); + tty_flip_buffer_push(&uport->state->port); } static void zs_raw_transmit_chars(struct zs_port *zport) diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 2f6967d61a80..555fdc0ed0f1 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -1439,7 +1439,6 @@ static void mgsl_isr_receive_data( struct mgsl_struct *info ) u16 status; int work = 0; unsigned char DataByte; - struct tty_struct *tty = info->port.tty; struct mgsl_icount *icount = &info->icount; if ( debug_level >= DEBUG_LEVEL_ISR ) @@ -1501,7 +1500,7 @@ static void mgsl_isr_receive_data( struct mgsl_struct *info ) if (status & RXSTATUS_BREAK_RECEIVED) { flag = TTY_BREAK; if (info->port.flags & ASYNC_SAK) - do_SAK(tty); + do_SAK(info->port.tty); } else if (status & RXSTATUS_PARITY_ERROR) flag = TTY_PARITY; else if (status & RXSTATUS_FRAMING_ERROR) @@ -1524,7 +1523,7 @@ static void mgsl_isr_receive_data( struct mgsl_struct *info ) } if(work) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&info->port); } /* mgsl_isr_misc() diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 9a0358a1e0dd..fced6acc74ee 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -1854,7 +1854,6 @@ static void hdlcdev_exit(struct slgt_info *info) */ static void rx_async(struct slgt_info *info) { - struct tty_struct *tty = info->port.tty; struct mgsl_icount *icount = &info->icount; unsigned int start, end; unsigned char *p; @@ -1915,8 +1914,8 @@ static void rx_async(struct slgt_info *info) break; } - if (tty && chars) - tty_flip_buffer_push(tty); + if (chars) + tty_flip_buffer_push(&info->port); } /* diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index 419f58ff4a13..e4a2904af565 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -2167,7 +2167,6 @@ static void isr_rxrdy(SLMP_INFO * info) { u16 status; unsigned char DataByte; - struct tty_struct *tty = info->port.tty; struct mgsl_icount *icount = &info->icount; if ( debug_level >= DEBUG_LEVEL_ISR ) @@ -2225,8 +2224,7 @@ static void isr_rxrdy(SLMP_INFO * info) icount->frame,icount->overrun); } - if ( tty ) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&info->port); } static void isr_txeom(SLMP_INFO * info, unsigned char status) diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index 1bfe97a8e2eb..b6efacadf23b 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -544,7 +544,7 @@ void tty_flush_to_ldisc(struct tty_struct *tty) /** * tty_flip_buffer_push - terminal - * @tty: tty to push + * @port: tty port to push * * Queue a push of the terminal flip buffers to the line discipline. This * function must not be called from IRQ context if port->low_latency is @@ -556,9 +556,9 @@ void tty_flush_to_ldisc(struct tty_struct *tty) * Locking: tty buffer lock. Driver locks in low latency mode. */ -void tty_flip_buffer_push(struct tty_struct *tty) +void tty_flip_buffer_push(struct tty_port *port) { - struct tty_bufhead *buf = &tty->port->buf; + struct tty_bufhead *buf = &port->buf; unsigned long flags; spin_lock_irqsave(&buf->lock, flags); @@ -566,7 +566,7 @@ void tty_flip_buffer_push(struct tty_struct *tty) buf->tail->commit = buf->tail->used; spin_unlock_irqrestore(&buf->lock, flags); - if (tty->port->low_latency) + if (port->low_latency) flush_to_ldisc(&buf->work); else schedule_work(&buf->work); diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 20dc2add27ba..15b36e2efa85 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -410,20 +410,12 @@ static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) static void acm_process_read_urb(struct acm *acm, struct urb *urb) { - struct tty_struct *tty; - if (!urb->actual_length) return; - tty = tty_port_tty_get(&acm->port); - if (!tty) - return; - tty_insert_flip_string(&acm->port, urb->transfer_buffer, urb->actual_length); - tty_flip_buffer_push(tty); - - tty_kref_put(tty); + tty_flip_buffer_push(&acm->port); } static void acm_read_bulk_callback(struct urb *urb) diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c index 3560799d530a..ca4fc3d3e7ff 100644 --- a/drivers/usb/gadget/u_serial.c +++ b/drivers/usb/gadget/u_serial.c @@ -551,8 +551,8 @@ static void gs_rx_push(unsigned long _port) /* Push from tty to ldisc; without low_latency set this is handled by * a workqueue, so we won't get callbacks and can hold port_lock */ - if (tty && do_push) - tty_flip_buffer_push(tty); + if (do_push) + tty_flip_buffer_push(&port->port); /* We want our data queue to become empty ASAP, keeping data diff --git a/drivers/usb/serial/aircable.c b/drivers/usb/serial/aircable.c index 3bb1f8f11fc8..6e320cec397d 100644 --- a/drivers/usb/serial/aircable.c +++ b/drivers/usb/serial/aircable.c @@ -140,16 +140,11 @@ static void aircable_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; char *data = (char *)urb->transfer_buffer; - struct tty_struct *tty; int has_headers; int count; int len; int i; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - has_headers = (urb->actual_length > 2 && data[0] == RX_HEADER_0); count = 0; @@ -160,8 +155,7 @@ static void aircable_process_read_urb(struct urb *urb) } if (count) - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static struct usb_serial_driver aircable_device = { diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c index 1614feb6a76e..cbd904b8fba5 100644 --- a/drivers/usb/serial/ark3116.c +++ b/drivers/usb/serial/ark3116.c @@ -674,7 +674,6 @@ static void ark3116_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; struct ark3116_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; char tty_flag = TTY_NORMAL; unsigned long flags; @@ -689,10 +688,6 @@ static void ark3116_process_read_urb(struct urb *urb) if (!urb->actual_length) return; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - if (lsr & UART_LSR_BRK_ERROR_BITS) { if (lsr & UART_LSR_BI) tty_flag = TTY_BREAK; @@ -707,8 +702,7 @@ static void ark3116_process_read_urb(struct urb *urb) } tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, urb->actual_length); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static struct usb_serial_driver ark3116_device = { diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c index 7ba2c0bdcec9..84217e78ded4 100644 --- a/drivers/usb/serial/belkin_sa.c +++ b/drivers/usb/serial/belkin_sa.c @@ -242,7 +242,6 @@ static void belkin_sa_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; struct belkin_sa_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; unsigned long flags; unsigned char status; @@ -259,10 +258,6 @@ static void belkin_sa_process_read_urb(struct urb *urb) if (!urb->actual_length) return; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - if (status & BELKIN_SA_LSR_ERR) { /* Break takes precedence over parity, which takes precedence * over framing errors. */ @@ -281,8 +276,7 @@ static void belkin_sa_process_read_urb(struct urb *urb) tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, urb->actual_length); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static void belkin_sa_set_termios(struct tty_struct *tty, diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c index e6976a974472..629bd2894506 100644 --- a/drivers/usb/serial/cyberjack.c +++ b/drivers/usb/serial/cyberjack.c @@ -324,7 +324,6 @@ static void cyberjack_read_bulk_callback(struct urb *urb) struct usb_serial_port *port = urb->context; struct cyberjack_private *priv = usb_get_serial_port_data(port); struct device *dev = &port->dev; - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; short todo; int result; @@ -337,16 +336,10 @@ static void cyberjack_read_bulk_callback(struct urb *urb) return; } - tty = tty_port_tty_get(&port->port); - if (!tty) { - dev_dbg(dev, "%s - ignoring since device not open\n", __func__); - return; - } if (urb->actual_length) { tty_insert_flip_string(&port->port, data, urb->actual_length); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); spin_lock(&priv->lock); diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c index ac14e3eb95ea..8efa19d0e9fb 100644 --- a/drivers/usb/serial/cypress_m8.c +++ b/drivers/usb/serial/cypress_m8.c @@ -1214,10 +1214,10 @@ static void cypress_read_int_callback(struct urb *urb) spin_unlock_irqrestore(&priv->lock, flags); /* process read if there is data other than line status */ - if (tty && bytes > i) { + if (bytes > i) { tty_insert_flip_string_fixed_flag(&port->port, data + i, tty_flag, bytes - i); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } spin_lock_irqsave(&priv->lock, flags); diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index b5fa738512ca..ebe45fa0ed50 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -1399,9 +1399,7 @@ static void digi_read_bulk_callback(struct urb *urb) static int digi_read_inb_callback(struct urb *urb) { - struct usb_serial_port *port = urb->context; - struct tty_struct *tty; struct digi_port *priv = usb_get_serial_port_data(port); int opcode = ((unsigned char *)urb->transfer_buffer)[0]; int len = ((unsigned char *)urb->transfer_buffer)[1]; @@ -1425,7 +1423,6 @@ static int digi_read_inb_callback(struct urb *urb) return -1; } - tty = tty_port_tty_get(&port->port); spin_lock(&priv->dp_port_lock); /* check for throttle; if set, do not resubmit read urb */ @@ -1435,7 +1432,7 @@ static int digi_read_inb_callback(struct urb *urb) priv->dp_throttle_restart = 1; /* receive data */ - if (tty && opcode == DIGI_CMD_RECEIVE_DATA) { + if (opcode == DIGI_CMD_RECEIVE_DATA) { /* get flag from port_status */ flag = 0; @@ -1457,11 +1454,10 @@ static int digi_read_inb_callback(struct urb *urb) if (len > 0) { tty_insert_flip_string_fixed_flag(&port->port, data, flag, len); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } } spin_unlock(&priv->dp_port_lock); - tty_kref_put(tty); if (opcode == DIGI_CMD_RECEIVE_DISABLE) dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__); diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index 6b880c33d258..b1b2dc64b50b 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -100,7 +100,6 @@ static void f81232_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; struct f81232_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; char tty_flag = TTY_NORMAL; unsigned long flags; @@ -117,10 +116,6 @@ static void f81232_process_read_urb(struct urb *urb) if (!urb->actual_length) return; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - /* break takes precedence over parity, */ /* which takes precedence over framing errors */ if (line_status & UART_BREAK_ERROR) @@ -145,8 +140,7 @@ static void f81232_process_read_urb(struct urb *urb) urb->actual_length); } - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static int set_control_lines(struct usb_device *dev, u8 value) diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index eb59ba3789ad..a96083b7fabc 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -2040,25 +2040,19 @@ static int ftdi_process_packet(struct usb_serial_port *port, static void ftdi_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; - struct tty_struct *tty; struct ftdi_private *priv = usb_get_serial_port_data(port); char *data = (char *)urb->transfer_buffer; int i; int len; int count = 0; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - for (i = 0; i < urb->actual_length; i += priv->max_packet_size) { len = min_t(int, urb->actual_length - i, priv->max_packet_size); count += ftdi_process_packet(port, priv, &data[i], len); } if (count) - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static void ftdi_break_ctl(struct tty_struct *tty, int break_state) diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c index 498b5f0da639..1a07b12ef341 100644 --- a/drivers/usb/serial/garmin_gps.c +++ b/drivers/usb/serial/garmin_gps.c @@ -252,14 +252,11 @@ static inline int isAbortTrfCmnd(const unsigned char *buf) static void send_to_tty(struct usb_serial_port *port, char *data, unsigned int actual_length) { - struct tty_struct *tty = tty_port_tty_get(&port->port); - - if (tty && actual_length) { + if (actual_length) { usb_serial_debug_data(&port->dev, __func__, actual_length, data); tty_insert_flip_string(&port->port, data, actual_length); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); } diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c index 3780f6a501b3..4c5c23f1cae5 100644 --- a/drivers/usb/serial/generic.c +++ b/drivers/usb/serial/generic.c @@ -313,17 +313,12 @@ EXPORT_SYMBOL_GPL(usb_serial_generic_submit_read_urbs); void usb_serial_generic_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; - struct tty_struct *tty; char *ch = (char *)urb->transfer_buffer; int i; if (!urb->actual_length) return; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - /* The per character mucking around with sysrq path it too slow for stuff like 3G modems, so shortcircuit it in the 99.9999999% of cases where the USB serial is not a console anyway */ @@ -335,8 +330,7 @@ void usb_serial_generic_process_read_urb(struct urb *urb) tty_insert_flip_char(&port->port, *ch, TTY_NORMAL); } } - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } EXPORT_SYMBOL_GPL(usb_serial_generic_process_read_urb); diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index f96b91da964f..b00e5cbf741f 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -232,8 +232,8 @@ static void process_rcvd_data(struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength); static void process_rcvd_status(struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3); -static void edge_tty_recv(struct usb_serial_port *port, struct tty_struct *tty, - unsigned char *data, int length); +static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, + int length); static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data); @@ -1752,7 +1752,6 @@ static void process_rcvd_data(struct edgeport_serial *edge_serial, struct device *dev = &edge_serial->serial->dev->dev; struct usb_serial_port *port; struct edgeport_port *edge_port; - struct tty_struct *tty; __u16 lastBufferLength; __u16 rxLen; @@ -1860,14 +1859,11 @@ static void process_rcvd_data(struct edgeport_serial *edge_serial, edge_serial->rxPort]; edge_port = usb_get_serial_port_data(port); if (edge_port->open) { - tty = tty_port_tty_get( - &edge_port->port->port); - if (tty) { - dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n", - __func__, rxLen, edge_serial->rxPort); - edge_tty_recv(edge_port->port, tty, buffer, rxLen); - tty_kref_put(tty); - } + dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n", + __func__, rxLen, + edge_serial->rxPort); + edge_tty_recv(edge_port->port, buffer, + rxLen); edge_port->icount.rx += rxLen; } buffer += rxLen; @@ -2017,8 +2013,8 @@ static void process_rcvd_status(struct edgeport_serial *edge_serial, * edge_tty_recv * this function passes data on to the tty flip buffer *****************************************************************************/ -static void edge_tty_recv(struct usb_serial_port *port, struct tty_struct *tty, - unsigned char *data, int length) +static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, + int length) { int cnt; @@ -2030,7 +2026,7 @@ static void edge_tty_recv(struct usb_serial_port *port, struct tty_struct *tty, data += cnt; length -= cnt; - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } @@ -2086,14 +2082,9 @@ static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, } /* Place LSR data byte into Rx buffer */ - if (lsrData) { - struct tty_struct *tty = - tty_port_tty_get(&edge_port->port->port); - if (tty) { - edge_tty_recv(edge_port->port, tty, &data, 1); - tty_kref_put(tty); - } - } + if (lsrData) + edge_tty_recv(edge_port->port, &data, 1); + /* update input line counters */ icount = &edge_port->icount; if (newLsr & LSR_BREAK) diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index 1286a0b2e2b7..d6485be49ebf 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -201,8 +201,8 @@ static int closing_wait = EDGE_CLOSING_WAIT; static bool ignore_cpu_rev; static int default_uart_mode; /* RS232 */ -static void edge_tty_recv(struct usb_serial_port *port, struct tty_struct *tty, - unsigned char *data, int length); +static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, + int length); static void stop_read(struct edgeport_port *edge_port); static int restart_read(struct edgeport_port *edge_port); @@ -1540,7 +1540,6 @@ static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, struct async_icount *icount; __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); - struct tty_struct *tty; dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr); @@ -1554,13 +1553,8 @@ static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); /* Place LSR data byte into Rx buffer */ - if (lsr_data) { - tty = tty_port_tty_get(&edge_port->port->port); - if (tty) { - edge_tty_recv(edge_port->port, tty, &data, 1); - tty_kref_put(tty); - } - } + if (lsr_data) + edge_tty_recv(edge_port->port, &data, 1); /* update input line counters */ icount = &edge_port->icount; @@ -1676,7 +1670,6 @@ static void edge_bulk_in_callback(struct urb *urb) struct edgeport_port *edge_port = urb->context; struct device *dev = &edge_port->port->dev; unsigned char *data = urb->transfer_buffer; - struct tty_struct *tty; int retval = 0; int port_number; int status = urb->status; @@ -1715,18 +1708,16 @@ static void edge_bulk_in_callback(struct urb *urb) ++data; } - tty = tty_port_tty_get(&edge_port->port->port); - if (tty && urb->actual_length) { + if (urb->actual_length) { usb_serial_debug_data(dev, __func__, urb->actual_length, data); if (edge_port->close_pending) dev_dbg(dev, "%s - close pending, dropping data on the floor\n", __func__); else - edge_tty_recv(edge_port->port, tty, data, + edge_tty_recv(edge_port->port, data, urb->actual_length); edge_port->icount.rx += urb->actual_length; } - tty_kref_put(tty); exit: /* continue read unless stopped */ @@ -1741,8 +1732,8 @@ exit: dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval); } -static void edge_tty_recv(struct usb_serial_port *port, struct tty_struct *tty, - unsigned char *data, int length) +static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, + int length) { int queued; @@ -1750,7 +1741,7 @@ static void edge_tty_recv(struct usb_serial_port *port, struct tty_struct *tty, if (queued < length) dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", __func__, length - queued); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } static void edge_bulk_out_callback(struct urb *urb) diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c index 171dae1f4a62..716930ab1bb1 100644 --- a/drivers/usb/serial/ir-usb.c +++ b/drivers/usb/serial/ir-usb.c @@ -287,7 +287,6 @@ static void ir_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; unsigned char *data = urb->transfer_buffer; - struct tty_struct *tty; if (!urb->actual_length) return; @@ -302,12 +301,8 @@ static void ir_process_read_urb(struct urb *urb) if (urb->actual_length == 1) return; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; tty_insert_flip_string(&port->port, data + 1, urb->actual_length - 1); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static void ir_set_termios_callback(struct urb *urb) diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c index dd0d910730c7..ff77027160aa 100644 --- a/drivers/usb/serial/iuu_phoenix.c +++ b/drivers/usb/serial/iuu_phoenix.c @@ -581,7 +581,6 @@ static void read_buf_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; unsigned char *data = urb->transfer_buffer; - struct tty_struct *tty; int status = urb->status; if (status) { @@ -592,14 +591,12 @@ static void read_buf_callback(struct urb *urb) } dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length); - tty = tty_port_tty_get(&port->port); if (data == NULL) dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__); - if (tty && urb->actual_length && data) { + if (urb->actual_length && data) { tty_insert_flip_string(&port->port, data, urb->actual_length); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); iuu_led_activity_on(urb); } diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c index 14a219ba4ee6..f6d7f68fa43c 100644 --- a/drivers/usb/serial/keyspan.c +++ b/drivers/usb/serial/keyspan.c @@ -291,7 +291,6 @@ static void usa26_indat_callback(struct urb *urb) int i, err; int endpoint; struct usb_serial_port *port; - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int status = urb->status; @@ -304,8 +303,7 @@ static void usa26_indat_callback(struct urb *urb) } port = urb->context; - tty = tty_port_tty_get(&port->port); - if (tty && urb->actual_length) { + if (urb->actual_length) { /* 0x80 bit is error flag */ if ((data[0] & 0x80) == 0) { /* no errors on individual bytes, only @@ -332,9 +330,8 @@ static void usa26_indat_callback(struct urb *urb) flag); } } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); /* Resubmit urb so we continue receiving */ err = usb_submit_urb(urb, GFP_ATOMIC); @@ -447,7 +444,6 @@ static void usa28_indat_callback(struct urb *urb) { int err; struct usb_serial_port *port; - struct tty_struct *tty; unsigned char *data; struct keyspan_port_private *p_priv; int status = urb->status; @@ -470,13 +466,11 @@ static void usa28_indat_callback(struct urb *urb) p_priv = usb_get_serial_port_data(port); data = urb->transfer_buffer; - tty = tty_port_tty_get(&port->port); - if (tty && urb->actual_length) { + if (urb->actual_length) { tty_insert_flip_string(&port->port, data, urb->actual_length); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); /* Resubmit urb so we continue receiving */ err = usb_submit_urb(urb, GFP_ATOMIC); @@ -671,7 +665,6 @@ static void usa49_indat_callback(struct urb *urb) int i, err; int endpoint; struct usb_serial_port *port; - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int status = urb->status; @@ -684,8 +677,7 @@ static void usa49_indat_callback(struct urb *urb) } port = urb->context; - tty = tty_port_tty_get(&port->port); - if (tty && urb->actual_length) { + if (urb->actual_length) { /* 0x80 bit is error flag */ if ((data[0] & 0x80) == 0) { /* no error on any byte */ @@ -706,9 +698,8 @@ static void usa49_indat_callback(struct urb *urb) flag); } } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); /* Resubmit urb so we continue receiving */ err = usb_submit_urb(urb, GFP_ATOMIC); @@ -721,7 +712,6 @@ static void usa49wg_indat_callback(struct urb *urb) int i, len, x, err; struct usb_serial *serial; struct usb_serial_port *port; - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int status = urb->status; @@ -746,7 +736,6 @@ static void usa49wg_indat_callback(struct urb *urb) return; } port = serial->port[data[i++]]; - tty = tty_port_tty_get(&port->port); len = data[i++]; /* 0x80 bit is error flag */ @@ -774,8 +763,7 @@ static void usa49wg_indat_callback(struct urb *urb) i += 2; } } - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } } @@ -796,7 +784,6 @@ static void usa90_indat_callback(struct urb *urb) int endpoint; struct usb_serial_port *port; struct keyspan_port_private *p_priv; - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int status = urb->status; @@ -812,7 +799,6 @@ static void usa90_indat_callback(struct urb *urb) p_priv = usb_get_serial_port_data(port); if (urb->actual_length) { - tty = tty_port_tty_get(&port->port); /* if current mode is DMA, looks like usa28 format otherwise looks like usa26 data format */ @@ -848,8 +834,7 @@ static void usa90_indat_callback(struct urb *urb) } } } - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } /* Resubmit urb so we continue receiving */ diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c index 334b1a295c6b..3b17d5d13dc8 100644 --- a/drivers/usb/serial/keyspan_pda.c +++ b/drivers/usb/serial/keyspan_pda.c @@ -138,7 +138,6 @@ static void keyspan_pda_request_unthrottle(struct work_struct *work) static void keyspan_pda_rx_interrupt(struct urb *urb) { struct usb_serial_port *port = urb->context; - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int retval; int status = urb->status; @@ -163,14 +162,12 @@ static void keyspan_pda_rx_interrupt(struct urb *urb) /* see if the message is data or a status interrupt */ switch (data[0]) { case 0: - tty = tty_port_tty_get(&port->port); /* rest of message is rx data */ - if (tty && urb->actual_length) { + if (urb->actual_length) { tty_insert_flip_string(&port->port, data + 1, urb->actual_length - 1); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); break; case 1: /* status interrupt */ diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c index 8ee0825ad700..769d910ae0a5 100644 --- a/drivers/usb/serial/kl5kusb105.c +++ b/drivers/usb/serial/kl5kusb105.c @@ -389,7 +389,6 @@ static void klsi_105_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; unsigned char *data = urb->transfer_buffer; - struct tty_struct *tty; unsigned len; /* empty urbs seem to happen, we ignore them */ @@ -401,10 +400,6 @@ static void klsi_105_process_read_urb(struct urb *urb) return; } - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - len = get_unaligned_le16(data); if (len > urb->actual_length - KLSI_HDR_LEN) { dev_dbg(&port->dev, "%s - packet length mismatch\n", __func__); @@ -412,8 +407,7 @@ static void klsi_105_process_read_urb(struct urb *urb) } tty_insert_flip_string(&port->port, data + KLSI_HDR_LEN, len); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static void klsi_105_set_termios(struct tty_struct *tty, diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c index 135c8b4b26f7..903d938e174b 100644 --- a/drivers/usb/serial/kobil_sct.c +++ b/drivers/usb/serial/kobil_sct.c @@ -324,7 +324,6 @@ static void kobil_read_int_callback(struct urb *urb) { int result; struct usb_serial_port *port = urb->context; - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int status = urb->status; @@ -333,8 +332,7 @@ static void kobil_read_int_callback(struct urb *urb) return; } - tty = tty_port_tty_get(&port->port); - if (tty && urb->actual_length) { + if (urb->actual_length) { /* BEGIN DEBUG */ /* @@ -354,9 +352,8 @@ static void kobil_read_int_callback(struct urb *urb) /* END DEBUG */ tty_insert_flip_string(&port->port, data, urb->actual_length); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result); diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c index ba20bb037b28..f42528e05d7b 100644 --- a/drivers/usb/serial/mct_u232.c +++ b/drivers/usb/serial/mct_u232.c @@ -531,7 +531,6 @@ static void mct_u232_read_int_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; struct mct_u232_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int retval; int status = urb->status; @@ -561,13 +560,9 @@ static void mct_u232_read_int_callback(struct urb *urb) */ if (urb->transfer_buffer_length > 2) { if (urb->actual_length) { - tty = tty_port_tty_get(&port->port); - if (tty) { - tty_insert_flip_string(&port->port, data, - urb->actual_length); - tty_flip_buffer_push(tty); - } - tty_kref_put(tty); + tty_insert_flip_string(&port->port, data, + urb->actual_length); + tty_flip_buffer_push(&port->port); } goto exit; } diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c index 6264f3974ea7..bf3c7a23553e 100644 --- a/drivers/usb/serial/metro-usb.c +++ b/drivers/usb/serial/metro-usb.c @@ -95,7 +95,6 @@ static void metrousb_read_int_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; struct metrousb_private *metro_priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int throttled = 0; int result = 0; @@ -124,15 +123,13 @@ static void metrousb_read_int_callback(struct urb *urb) /* Set the data read from the usb port into the serial port buffer. */ - tty = tty_port_tty_get(&port->port); - if (tty && urb->actual_length) { + if (urb->actual_length) { /* Loop through the data copying each byte to the tty layer. */ tty_insert_flip_string(&port->port, data, urb->actual_length); /* Force the data to the tty layer. */ - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); /* Set any port variables. */ spin_lock_irqsave(&metro_priv->lock, flags); diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c index 22818fb765e0..e0ebec3b5d6a 100644 --- a/drivers/usb/serial/mos7720.c +++ b/drivers/usb/serial/mos7720.c @@ -899,7 +899,6 @@ static void mos7720_bulk_in_callback(struct urb *urb) int retval; unsigned char *data ; struct usb_serial_port *port; - struct tty_struct *tty; int status = urb->status; if (status) { @@ -913,12 +912,10 @@ static void mos7720_bulk_in_callback(struct urb *urb) data = urb->transfer_buffer; - tty = tty_port_tty_get(&port->port); - if (tty && urb->actual_length) { + if (urb->actual_length) { tty_insert_flip_string(&port->port, data, urb->actual_length); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); if (port->read_urb->status != -EINPROGRESS) { retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c index 3ddd7a1f7ff3..809fb329eca5 100644 --- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -744,7 +744,6 @@ static void mos7840_bulk_in_callback(struct urb *urb) struct usb_serial *serial; struct usb_serial_port *port; struct moschip_port *mos7840_port; - struct tty_struct *tty; int status = urb->status; mos7840_port = urb->context; @@ -774,12 +773,8 @@ static void mos7840_bulk_in_callback(struct urb *urb) if (urb->actual_length) { struct tty_port *tport = &mos7840_port->port->port; - tty = tty_port_tty_get(tport); - if (tty) { - tty_insert_flip_string(tport, data, urb->actual_length); - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + tty_insert_flip_string(tport, data, urb->actual_length); + tty_flip_buffer_push(tport); mos7840_port->icount.rx += urb->actual_length; smp_wmb(); dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx); diff --git a/drivers/usb/serial/navman.c b/drivers/usb/serial/navman.c index 0d96a1a7b9e5..38725fc8c2c8 100644 --- a/drivers/usb/serial/navman.c +++ b/drivers/usb/serial/navman.c @@ -32,7 +32,6 @@ static void navman_read_int_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; unsigned char *data = urb->transfer_buffer; - struct tty_struct *tty; int status = urb->status; int result; @@ -55,12 +54,10 @@ static void navman_read_int_callback(struct urb *urb) usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); - tty = tty_port_tty_get(&port->port); - if (tty && urb->actual_length) { + if (urb->actual_length) { tty_insert_flip_string(&port->port, data, urb->actual_length); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); exit: result = usb_submit_urb(urb, GFP_ATOMIC); diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c index 338191bae5a3..1e1cafe287e4 100644 --- a/drivers/usb/serial/omninet.c +++ b/drivers/usb/serial/omninet.c @@ -174,14 +174,9 @@ static void omninet_read_bulk_callback(struct urb *urb) } if (urb->actual_length && header->oh_len) { - struct tty_struct *tty = tty_port_tty_get(&port->port); - if (tty) { - tty_insert_flip_string(&port->port, - data + OMNINET_DATAOFFSET, - header->oh_len); - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + tty_insert_flip_string(&port->port, data + OMNINET_DATAOFFSET, + header->oh_len); + tty_flip_buffer_push(&port->port); } /* Continue trying to always read */ diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c index d3b74e50aff1..e13e1a4d3e1e 100644 --- a/drivers/usb/serial/opticon.c +++ b/drivers/usb/serial/opticon.c @@ -51,15 +51,8 @@ struct opticon_private { static void opticon_process_data_packet(struct usb_serial_port *port, const unsigned char *buf, size_t len) { - struct tty_struct *tty; - - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - tty_insert_flip_string(&port->port, buf, len); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static void opticon_process_status_packet(struct usb_serial_port *port, diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c index 7a53fe9f3af3..a958fd41b5b3 100644 --- a/drivers/usb/serial/oti6858.c +++ b/drivers/usb/serial/oti6858.c @@ -820,7 +820,6 @@ static void oti6858_read_bulk_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; struct oti6858_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; unsigned long flags; int status = urb->status; @@ -835,12 +834,10 @@ static void oti6858_read_bulk_callback(struct urb *urb) return; } - tty = tty_port_tty_get(&port->port); - if (tty != NULL && urb->actual_length > 0) { + if (urb->actual_length > 0) { tty_insert_flip_string(&port->port, data, urb->actual_length); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); } - tty_kref_put(tty); /* schedule the interrupt urb */ result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 00047f3c7293..54adc9125e5c 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -772,7 +772,6 @@ static void pl2303_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; struct pl2303_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; char tty_flag = TTY_NORMAL; unsigned long flags; @@ -789,10 +788,6 @@ static void pl2303_process_read_urb(struct urb *urb) if (!urb->actual_length) return; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - /* break takes precedence over parity, */ /* which takes precedence over framing errors */ if (line_status & UART_BREAK_ERROR) @@ -817,8 +812,7 @@ static void pl2303_process_read_urb(struct urb *urb) urb->actual_length); } - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } /* All of the device info needed for the PL2303 SIO serial converter */ diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c index 5dccc4f957df..6850745808c3 100644 --- a/drivers/usb/serial/quatech2.c +++ b/drivers/usb/serial/quatech2.c @@ -609,7 +609,6 @@ void qt2_process_read_urb(struct urb *urb) struct qt2_serial_private *serial_priv; struct usb_serial_port *port; struct qt2_port_private *port_priv; - struct tty_struct *tty; bool escapeflag; unsigned char *ch; int i; @@ -620,15 +619,11 @@ void qt2_process_read_urb(struct urb *urb) return; ch = urb->transfer_buffer; - tty = NULL; serial = urb->context; serial_priv = usb_get_serial_data(serial); port = serial->port[serial_priv->current_port]; port_priv = usb_get_serial_port_data(port); - if (port_priv->is_open) - tty = tty_port_tty_get(&port->port); - for (i = 0; i < urb->actual_length; i++) { ch = (unsigned char *)urb->transfer_buffer + i; if ((i <= (len - 3)) && @@ -666,10 +661,7 @@ void qt2_process_read_urb(struct urb *urb) __func__); break; } - if (tty) { - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + tty_flip_buffer_push(&port->port); newport = *(ch + 3); @@ -683,10 +675,6 @@ void qt2_process_read_urb(struct urb *urb) serial_priv->current_port = newport; port = serial->port[serial_priv->current_port]; port_priv = usb_get_serial_port_data(port); - if (port_priv->is_open) - tty = tty_port_tty_get(&port->port); - else - tty = NULL; i += 3; escapeflag = true; break; @@ -716,10 +704,7 @@ void qt2_process_read_urb(struct urb *urb) tty_insert_flip_string(&port->port, ch, 1); } - if (tty) { - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + tty_flip_buffer_push(&port->port); } static void qt2_write_bulk_callback(struct urb *urb) diff --git a/drivers/usb/serial/safe_serial.c b/drivers/usb/serial/safe_serial.c index ad12e9e2c7ee..21cd7bf2a8cc 100644 --- a/drivers/usb/serial/safe_serial.c +++ b/drivers/usb/serial/safe_serial.c @@ -207,38 +207,31 @@ static void safe_process_read_urb(struct urb *urb) unsigned char *data = urb->transfer_buffer; unsigned char length = urb->actual_length; int actual_length; - struct tty_struct *tty; __u16 fcs; if (!length) return; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - if (!safe) goto out; fcs = fcs_compute10(data, length, CRC10_INITFCS); if (fcs) { dev_err(&port->dev, "%s - bad CRC %x\n", __func__, fcs); - goto err; + return; } actual_length = data[length - 2] >> 2; if (actual_length > (length - 2)) { dev_err(&port->dev, "%s - inconsistent lengths %d:%d\n", __func__, actual_length, length); - goto err; + return; } dev_info(&urb->dev->dev, "%s - actual: %d\n", __func__, actual_length); length = actual_length; out: tty_insert_flip_string(&port->port, data, length); - tty_flip_buffer_push(tty); -err: - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static int safe_prepare_write_buffer(struct usb_serial_port *port, diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index 64e53fda149b..70aee8d59f23 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -569,7 +569,6 @@ static void sierra_indat_callback(struct urb *urb) int err; int endpoint; struct usb_serial_port *port; - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int status = urb->status; @@ -581,16 +580,12 @@ static void sierra_indat_callback(struct urb *urb) " endpoint %02x\n", __func__, status, endpoint); } else { if (urb->actual_length) { - tty = tty_port_tty_get(&port->port); - if (tty) { - tty_insert_flip_string(&port->port, data, - urb->actual_length); - tty_flip_buffer_push(tty); - - tty_kref_put(tty); - usb_serial_debug_data(&port->dev, __func__, - urb->actual_length, data); - } + tty_insert_flip_string(&port->port, data, + urb->actual_length); + tty_flip_buffer_push(&port->port); + + usb_serial_debug_data(&port->dev, __func__, + urb->actual_length, data); } else { dev_dbg(&port->dev, "%s: empty read urb" " received\n", __func__); diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c index 04e373152724..91ff8e3bddbd 100644 --- a/drivers/usb/serial/spcp8x5.c +++ b/drivers/usb/serial/spcp8x5.c @@ -462,7 +462,6 @@ static void spcp8x5_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; struct spcp8x5_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; unsigned long flags; u8 status; @@ -481,9 +480,6 @@ static void spcp8x5_process_read_urb(struct urb *urb) if (!urb->actual_length) return; - tty = tty_port_tty_get(&port->port); - if (!tty) - return; if (status & UART_STATE_TRANSIENT_MASK) { /* break takes precedence over parity, which takes precedence @@ -500,15 +496,19 @@ static void spcp8x5_process_read_urb(struct urb *urb) if (status & UART_OVERRUN_ERROR) tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); - if (status & UART_DCD) - usb_serial_handle_dcd_change(port, tty, - priv->line_status & MSR_STATUS_LINE_DCD); + if (status & UART_DCD) { + struct tty_struct *tty = tty_port_tty_get(&port->port); + if (tty) { + usb_serial_handle_dcd_change(port, tty, + priv->line_status & MSR_STATUS_LINE_DCD); + tty_kref_put(tty); + } + } } tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, urb->actual_length); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static int spcp8x5_wait_modem_info(struct usb_serial_port *port, diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c index 38713156e957..58bc7e793524 100644 --- a/drivers/usb/serial/ssu100.c +++ b/drivers/usb/serial/ssu100.c @@ -582,7 +582,7 @@ static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr, } -static int ssu100_process_packet(struct urb *urb) +static void ssu100_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; char *packet = (char *)urb->transfer_buffer; @@ -609,7 +609,7 @@ static int ssu100_process_packet(struct urb *urb) ch = packet; if (!len) - return 0; /* status only */ + return; /* status only */ if (port->port.console && port->sysrq) { for (i = 0; i < len; i++, ch++) { @@ -619,24 +619,7 @@ static int ssu100_process_packet(struct urb *urb) } else tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len); - return len; -} - -static void ssu100_process_read_urb(struct urb *urb) -{ - struct usb_serial_port *port = urb->context; - struct tty_struct *tty; - int count; - - tty = tty_port_tty_get(&port->port); - if (!tty) - return; - - count = ssu100_process_packet(urb); - - if (count) - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&port->port); } static struct usb_serial_driver ssu100_device = { diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c index 2ffa6ae3b5ed..be05e6caf9a3 100644 --- a/drivers/usb/serial/symbolserial.c +++ b/drivers/usb/serial/symbolserial.c @@ -48,7 +48,6 @@ static void symbol_int_callback(struct urb *urb) unsigned char *data = urb->transfer_buffer; struct usb_serial_port *port = priv->port; int status = urb->status; - struct tty_struct *tty; int result; int data_length; @@ -82,13 +81,8 @@ static void symbol_int_callback(struct urb *urb) * we pretty much just ignore the size and send everything * else to the tty layer. */ - tty = tty_port_tty_get(&port->port); - if (tty) { - tty_insert_flip_string(&port->port, &data[1], - data_length); - tty_flip_buffer_push(tty); - tty_kref_put(tty); - } + tty_insert_flip_string(&port->port, &data[1], data_length); + tty_flip_buffer_push(&port->port); } else { dev_dbg(&priv->udev->dev, "Improper amount of data received from the device, " diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c index 05077e3c7631..39cb9b807c3c 100644 --- a/drivers/usb/serial/ti_usb_3410_5052.c +++ b/drivers/usb/serial/ti_usb_3410_5052.c @@ -121,8 +121,8 @@ static void ti_interrupt_callback(struct urb *urb); static void ti_bulk_in_callback(struct urb *urb); static void ti_bulk_out_callback(struct urb *urb); -static void ti_recv(struct usb_serial_port *port, struct tty_struct *tty, - unsigned char *data, int length); +static void ti_recv(struct usb_serial_port *port, unsigned char *data, + int length); static void ti_send(struct ti_port *tport); static int ti_set_mcr(struct ti_port *tport, unsigned int mcr); static int ti_get_lsr(struct ti_port *tport); @@ -1118,7 +1118,6 @@ static void ti_bulk_in_callback(struct urb *urb) struct device *dev = &urb->dev->dev; int status = urb->status; int retval = 0; - struct tty_struct *tty; switch (status) { case 0: @@ -1145,23 +1144,18 @@ static void ti_bulk_in_callback(struct urb *urb) return; } - tty = tty_port_tty_get(&port->port); - if (tty) { - if (urb->actual_length) { - usb_serial_debug_data(dev, __func__, urb->actual_length, - urb->transfer_buffer); + if (urb->actual_length) { + usb_serial_debug_data(dev, __func__, urb->actual_length, + urb->transfer_buffer); - if (!tport->tp_is_open) - dev_dbg(dev, "%s - port closed, dropping data\n", - __func__); - else - ti_recv(port, tty, urb->transfer_buffer, - urb->actual_length); - spin_lock(&tport->tp_lock); - tport->tp_icount.rx += urb->actual_length; - spin_unlock(&tport->tp_lock); - } - tty_kref_put(tty); + if (!tport->tp_is_open) + dev_dbg(dev, "%s - port closed, dropping data\n", + __func__); + else + ti_recv(port, urb->transfer_buffer, urb->actual_length); + spin_lock(&tport->tp_lock); + tport->tp_icount.rx += urb->actual_length; + spin_unlock(&tport->tp_lock); } exit: @@ -1209,8 +1203,8 @@ static void ti_bulk_out_callback(struct urb *urb) } -static void ti_recv(struct usb_serial_port *port, struct tty_struct *tty, - unsigned char *data, int length) +static void ti_recv(struct usb_serial_port *port, unsigned char *data, + int length) { int cnt; @@ -1222,11 +1216,10 @@ static void ti_recv(struct usb_serial_port *port, struct tty_struct *tty, if (cnt == 0) break; } - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&port->port); data += cnt; length -= cnt; } while (length > 0); - } diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c index 293b460030cb..a547c91e3c05 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -275,7 +275,6 @@ static void usb_wwan_indat_callback(struct urb *urb) int err; int endpoint; struct usb_serial_port *port; - struct tty_struct *tty; struct device *dev; unsigned char *data = urb->transfer_buffer; int status = urb->status; @@ -288,16 +287,12 @@ static void usb_wwan_indat_callback(struct urb *urb) dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n", __func__, status, endpoint); } else { - tty = tty_port_tty_get(&port->port); - if (tty) { - if (urb->actual_length) { - tty_insert_flip_string(&port->port, data, - urb->actual_length); - tty_flip_buffer_push(tty); - } else - dev_dbg(dev, "%s: empty read urb received\n", __func__); - tty_kref_put(tty); - } + if (urb->actual_length) { + tty_insert_flip_string(&port->port, data, + urb->actual_length); + tty_flip_buffer_push(&port->port); + } else + dev_dbg(dev, "%s: empty read urb received\n", __func__); /* Resubmit urb so we continue receiving */ err = usb_submit_urb(urb, GFP_ATOMIC); diff --git a/include/linux/tty.h b/include/linux/tty.h index f16a47a13a09..f89acd1ed6d3 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -387,7 +387,6 @@ extern void do_SAK(struct tty_struct *tty); extern void __do_SAK(struct tty_struct *tty); extern void disassociate_ctty(int priv); extern void no_tty(void); -extern void tty_flip_buffer_push(struct tty_struct *tty); extern void tty_flush_to_ldisc(struct tty_struct *tty); extern void tty_buffer_free_all(struct tty_port *port); extern void tty_buffer_flush(struct tty_struct *tty); diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h index 5cb694aba322..c5572807633a 100644 --- a/include/linux/tty_flip.h +++ b/include/linux/tty_flip.h @@ -10,6 +10,7 @@ extern int tty_prepare_flip_string(struct tty_port *port, unsigned char **chars, size_t size); extern int tty_prepare_flip_string_flags(struct tty_port *port, unsigned char **chars, char **flags, size_t size); +extern void tty_flip_buffer_push(struct tty_port *port); void tty_schedule_flip(struct tty_struct *tty); static inline int tty_insert_flip_char(struct tty_port *port, diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index cbec3b642871..b6e44ad6cca6 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -541,23 +541,21 @@ int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb) { struct rfcomm_dev *dev = dlc->owner; - struct tty_struct *tty; if (!dev) { kfree_skb(skb); return; } - tty = dev->port.tty; - if (!tty || !skb_queue_empty(&dev->pending)) { + if (!skb_queue_empty(&dev->pending)) { skb_queue_tail(&dev->pending, skb); return; } - BT_DBG("dlc %p tty %p len %d", dlc, tty, skb->len); + BT_DBG("dlc %p len %d", dlc, skb->len); tty_insert_flip_string(&dev->port, skb->data, skb->len); - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&dev->port); kfree_skb(skb); } @@ -621,14 +619,10 @@ static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig) /* ---- TTY functions ---- */ static void rfcomm_tty_copy_pending(struct rfcomm_dev *dev) { - struct tty_struct *tty = dev->port.tty; struct sk_buff *skb; int inserted = 0; - if (!tty) - return; - - BT_DBG("dev %p tty %p", dev, tty); + BT_DBG("dev %p", dev); rfcomm_dlc_lock(dev->dlc); @@ -641,7 +635,7 @@ static void rfcomm_tty_copy_pending(struct rfcomm_dev *dev) rfcomm_dlc_unlock(dev->dlc); if (inserted > 0) - tty_flip_buffer_push(tty); + tty_flip_buffer_push(&dev->port); } static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp) diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 2491f6f53871..9a5fd3c3e530 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -1136,14 +1136,14 @@ static int ircomm_tty_data_indication(void *instance, void *sap, ircomm_tty_send_initial_parameters(self); ircomm_tty_link_established(self); } + tty_kref_put(tty); /* * Use flip buffer functions since the code may be called from interrupt * context */ tty_insert_flip_string(&self->port, skb->data, skb->len); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(&self->port); /* No need to kfree_skb - see ircomm_ttp_data_indication() */ |
