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-rw-r--r--drivers/char/drm/i915_dma.c14
-rw-r--r--drivers/char/drm/i915_drv.h1
-rw-r--r--drivers/char/hvc_lguest.c1
-rw-r--r--drivers/char/pcmcia/cm4000_cs.c5
-rw-r--r--drivers/char/pcmcia/cm4040_cs.c2
-rw-r--r--drivers/char/tty_io.c56
6 files changed, 66 insertions, 13 deletions
diff --git a/drivers/char/drm/i915_dma.c b/drivers/char/drm/i915_dma.c
index 3359cc2b9736..8e7d713a5a15 100644
--- a/drivers/char/drm/i915_dma.c
+++ b/drivers/char/drm/i915_dma.c
@@ -184,6 +184,8 @@ static int i915_initialize(struct drm_device * dev,
* private backbuffer/depthbuffer usage.
*/
dev_priv->use_mi_batchbuffer_start = 0;
+ if (IS_I965G(dev)) /* 965 doesn't support older method */
+ dev_priv->use_mi_batchbuffer_start = 1;
/* Allow hardware batchbuffers unless told otherwise.
*/
@@ -517,8 +519,13 @@ static int i915_dispatch_batchbuffer(struct drm_device * dev,
if (dev_priv->use_mi_batchbuffer_start) {
BEGIN_LP_RING(2);
- OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
- OUT_RING(batch->start | MI_BATCH_NON_SECURE);
+ if (IS_I965G(dev)) {
+ OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
+ OUT_RING(batch->start);
+ } else {
+ OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
+ OUT_RING(batch->start | MI_BATCH_NON_SECURE);
+ }
ADVANCE_LP_RING();
} else {
BEGIN_LP_RING(4);
@@ -735,7 +742,8 @@ static int i915_setparam(DRM_IOCTL_ARGS)
switch (param.param) {
case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
- dev_priv->use_mi_batchbuffer_start = param.value;
+ if (!IS_I965G(dev))
+ dev_priv->use_mi_batchbuffer_start = param.value;
break;
case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
dev_priv->tex_lru_log_granularity = param.value;
diff --git a/drivers/char/drm/i915_drv.h b/drivers/char/drm/i915_drv.h
index fd918565f4e5..737088bd0780 100644
--- a/drivers/char/drm/i915_drv.h
+++ b/drivers/char/drm/i915_drv.h
@@ -282,6 +282,7 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
#define MI_BATCH_BUFFER_START (0x31<<23)
#define MI_BATCH_BUFFER_END (0xA<<23)
#define MI_BATCH_NON_SECURE (1)
+#define MI_BATCH_NON_SECURE_I965 (1<<8)
#define MI_WAIT_FOR_EVENT ((0x3<<23))
#define MI_WAIT_FOR_PLANE_A_FLIP (1<<2)
diff --git a/drivers/char/hvc_lguest.c b/drivers/char/hvc_lguest.c
index feeccbaec438..3d6bd0baa56d 100644
--- a/drivers/char/hvc_lguest.c
+++ b/drivers/char/hvc_lguest.c
@@ -35,6 +35,7 @@
#include <linux/err.h>
#include <linux/init.h>
#include <linux/lguest_bus.h>
+#include <asm/paravirt.h>
#include "hvc_console.h"
/*D:340 This is our single console input buffer, with associated "struct
diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index fee58e03dbe2..4177f6db83e9 100644
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -1629,7 +1629,7 @@ static int cmm_open(struct inode *inode, struct file *filp)
{
struct cm4000_dev *dev;
struct pcmcia_device *link;
- int rc, minor = iminor(inode);
+ int minor = iminor(inode);
if (minor >= CM4000_MAX_DEV)
return -ENODEV;
@@ -1668,7 +1668,6 @@ static int cmm_open(struct inode *inode, struct file *filp)
start_monitor(dev);
link->open = 1; /* only one open per device */
- rc = 0;
DEBUGP(2, dev, "<- cmm_open\n");
return nonseekable_open(inode, filp);
@@ -1824,7 +1823,7 @@ static int cm4000_resume(struct pcmcia_device *link)
static void cm4000_release(struct pcmcia_device *link)
{
- cmm_cm4000_release(link->priv); /* delay release until device closed */
+ cmm_cm4000_release(link); /* delay release until device closed */
pcmcia_disable_device(link);
}
diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
index af88181a17f4..b24a3e7bbb9f 100644
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -599,7 +599,7 @@ cs_release:
static void reader_release(struct pcmcia_device *link)
{
- cm4040_reader_release(link->priv);
+ cm4040_reader_release(link);
pcmcia_disable_device(link);
}
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index de37ebc3a4cf..51ea93cab6c4 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -369,25 +369,54 @@ static void tty_buffer_free(struct tty_struct *tty, struct tty_buffer *b)
}
/**
- * tty_buffer_flush - flush full tty buffers
+ * __tty_buffer_flush - flush full tty buffers
* @tty: tty to flush
*
- * flush all the buffers containing receive data
+ * flush all the buffers containing receive data. Caller must
+ * hold the buffer lock and must have ensured no parallel flush to
+ * ldisc is running.
*
- * Locking: none
+ * Locking: Caller must hold tty->buf.lock
*/
-static void tty_buffer_flush(struct tty_struct *tty)
+static void __tty_buffer_flush(struct tty_struct *tty)
{
struct tty_buffer *thead;
- unsigned long flags;
- spin_lock_irqsave(&tty->buf.lock, flags);
while((thead = tty->buf.head) != NULL) {
tty->buf.head = thead->next;
tty_buffer_free(tty, thead);
}
tty->buf.tail = NULL;
+}
+
+/**
+ * tty_buffer_flush - flush full tty buffers
+ * @tty: tty to flush
+ *
+ * flush all the buffers containing receive data. If the buffer is
+ * being processed by flush_to_ldisc then we defer the processing
+ * to that function
+ *
+ * Locking: none
+ */
+
+static void tty_buffer_flush(struct tty_struct *tty)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&tty->buf.lock, flags);
+
+ /* If the data is being pushed to the tty layer then we can't
+ process it here. Instead set a flag and the flush_to_ldisc
+ path will process the flush request before it exits */
+ if (test_bit(TTY_FLUSHING, &tty->flags)) {
+ set_bit(TTY_FLUSHPENDING, &tty->flags);
+ spin_unlock_irqrestore(&tty->buf.lock, flags);
+ wait_event(tty->read_wait,
+ test_bit(TTY_FLUSHPENDING, &tty->flags) == 0);
+ return;
+ } else
+ __tty_buffer_flush(tty);
spin_unlock_irqrestore(&tty->buf.lock, flags);
}
@@ -3594,6 +3623,7 @@ static void flush_to_ldisc(struct work_struct *work)
return;
spin_lock_irqsave(&tty->buf.lock, flags);
+ set_bit(TTY_FLUSHING, &tty->flags); /* So we know a flush is running */
head = tty->buf.head;
if (head != NULL) {
tty->buf.head = NULL;
@@ -3607,6 +3637,11 @@ static void flush_to_ldisc(struct work_struct *work)
tty_buffer_free(tty, tbuf);
continue;
}
+ /* Ldisc or user is trying to flush the buffers
+ we are feeding to the ldisc, stop feeding the
+ line discipline as we want to empty the queue */
+ if (test_bit(TTY_FLUSHPENDING, &tty->flags))
+ break;
if (!tty->receive_room) {
schedule_delayed_work(&tty->buf.work, 1);
break;
@@ -3620,8 +3655,17 @@ static void flush_to_ldisc(struct work_struct *work)
disc->receive_buf(tty, char_buf, flag_buf, count);
spin_lock_irqsave(&tty->buf.lock, flags);
}
+ /* Restore the queue head */
tty->buf.head = head;
}
+ /* We may have a deferred request to flush the input buffer,
+ if so pull the chain under the lock and empty the queue */
+ if (test_bit(TTY_FLUSHPENDING, &tty->flags)) {
+ __tty_buffer_flush(tty);
+ clear_bit(TTY_FLUSHPENDING, &tty->flags);
+ wake_up(&tty->read_wait);
+ }
+ clear_bit(TTY_FLUSHING, &tty->flags);
spin_unlock_irqrestore(&tty->buf.lock, flags);
tty_ldisc_deref(disc);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 05:11:09 +0000