5 files changed, 25 insertions, 29 deletions

diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 52f4361eb6e4..d765afda9c2a 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -271,15 +271,15 @@ static __devinit int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp,
 	nb_order = (nb_order >> 1) & 7;
 	pci_read_config_dword(nb, AMD64_GARTAPERTUREBASE, &nb_base);
 	nb_aper = nb_base << 25;
-	if (agp_aperture_valid(nb_aper, (32*1024*1024)<<nb_order)) {
-		return 0;
-	}
 
 	/* Northbridge seems to contain crap. Try the AGP bridge. */
 
 	pci_read_config_word(agp, cap+0x14, &apsize);
-	if (apsize == 0xffff)
+	if (apsize == 0xffff) {
+		if (agp_aperture_valid(nb_aper, (32*1024*1024)<<nb_order))
+			return 0;
 		return -1;
+	}
 
 	apsize &= 0xfff;
 	/* Some BIOS use weird encodings not in the AGPv3 table. */
@@ -301,6 +301,11 @@ static __devinit int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp,
 		order = nb_order;
 	}
 
+	if (nb_order >= order) {
+		if (agp_aperture_valid(nb_aper, (32*1024*1024)<<nb_order))
+			return 0;
+	}
+
 	dev_info(&agp->dev, "aperture from AGP @ %Lx size %u MB\n",
 		 aper, 32 << order);
 	if (order < 0 || !agp_aperture_valid(aper, (32*1024*1024)<<order))
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index c7714185f831..4373adb2119a 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -633,13 +633,15 @@ static void intel_i830_init_gtt_entries(void)
 			break;
 		}
 	}
-	if (gtt_entries > 0)
+	if (gtt_entries > 0) {
 		dev_info(&agp_bridge->dev->dev, "detected %dK %s memory\n",
 		       gtt_entries / KB(1), local ? "local" : "stolen");
-	else
+		gtt_entries /= KB(4);
+	} else {
 		dev_info(&agp_bridge->dev->dev,
 		       "no pre-allocated video memory detected\n");
-	gtt_entries /= KB(4);
+		gtt_entries = 0;
+	}
 
 	intel_private.gtt_entries = gtt_entries;
 }
diff --git a/drivers/char/agp/parisc-agp.c b/drivers/char/agp/parisc-agp.c
index db60539bf67a..699e3422ad93 100644
--- a/drivers/char/agp/parisc-agp.c
+++ b/drivers/char/agp/parisc-agp.c
@@ -359,9 +359,16 @@ fail:
 	return error;
 }
 
-static struct device *next_device(struct klist_iter *i) {
-	struct klist_node * n = klist_next(i);
-	return n ? container_of(n, struct device, knode_parent) : NULL;
+static int
+find_quicksilver(struct device *dev, void *data)
+{
+	struct parisc_device **lba = data;
+	struct parisc_device *padev = to_parisc_device(dev);
+
+	if (IS_QUICKSILVER(padev))
+		*lba = padev;
+
+	return 0;
 }
 
 static int
@@ -372,8 +379,6 @@ parisc_agp_init(void)
 	int err = -1;
 	struct parisc_device *sba = NULL, *lba = NULL;
 	struct lba_device *lbadev = NULL;
-	struct device *dev = NULL;
-	struct klist_iter i;
 
 	if (!sba_list)
 		goto out;
@@ -386,13 +391,7 @@ parisc_agp_init(void)
 	}
 
 	/* Now search our Pluto for our precious AGP device... */
-	klist_iter_init(&sba->dev.klist_children, &i);
-	while ((dev = next_device(&i))) {
-		struct parisc_device *padev = to_parisc_device(dev);
-		if (IS_QUICKSILVER(padev))
-			lba = padev;
-	}
-	klist_iter_exit(&i);
+	device_for_each_child(&sba->dev, &lba, find_quicksilver);
 
 	if (!lba) {
 		printk(KERN_INFO DRVPFX "No AGP devices found.\n");
diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index 6e6eb445d374..c76bccf5354d 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -1139,15 +1139,6 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
 	hvcsd->tty = tty;
 	tty->driver_data = hvcsd;
 
-	/*
-	 * Set this driver to low latency so that we actually have a chance at
-	 * catching a throttled TTY after we flip_buffer_push.  Otherwise the
-	 * flush_to_async may not execute until after the kernel_thread has
-	 * yielded and resumed the next flip_buffer_push resulting in data
-	 * loss.
-	 */
-	tty->low_latency = 1;
-
 	memset(&hvcsd->buffer[0], 0x00, HVCS_BUFF_LEN);
 
 	/*
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index 406f8742a260..2989056a9e39 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -810,7 +810,6 @@ static int hvsi_open(struct tty_struct *tty, struct file *filp)
 	hp = &hvsi_ports[line];
 
 	tty->driver_data = hp;
-	tty->low_latency = 1; /* avoid throttle/tty_flip_buffer_push race */
 
 	mb();
 	if (hp->state == HVSI_FSP_DIED)