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authorTrond Myklebust <Trond.Myklebust@netapp.com>2008-03-19 17:59:44 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-03-19 17:59:44 -0400
commitc7c350e92aab1bba68f26a6027b734adcf9824ba (patch)
treeaa99bd94c3049dd871d9c030d70a5f3d87591a95 /drivers/char/drm/drm_lock.c
parent2f42b5d043ee271d1e5d30ecd77186b6c4d4e534 (diff)
parentf8512ad0da16cbe156f3a7627971cdf0b39c4138 (diff)
downloadlinux-c7c350e92aab1bba68f26a6027b734adcf9824ba.tar.bz2
Merge branch 'hotfixes' into devel
Diffstat (limited to 'drivers/char/drm/drm_lock.c')
-rw-r--r--drivers/char/drm/drm_lock.c35
1 files changed, 20 insertions, 15 deletions
diff --git a/drivers/char/drm/drm_lock.c b/drivers/char/drm/drm_lock.c
index bea2a7d5b2b2..12dcdd1832f0 100644
--- a/drivers/char/drm/drm_lock.c
+++ b/drivers/char/drm/drm_lock.c
@@ -53,6 +53,7 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
DECLARE_WAITQUEUE(entry, current);
struct drm_lock *lock = data;
int ret = 0;
+ unsigned long irqflags;
++file_priv->lock_count;
@@ -71,9 +72,9 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
return -EINVAL;
add_wait_queue(&dev->lock.lock_queue, &entry);
- spin_lock(&dev->lock.spinlock);
+ spin_lock_irqsave(&dev->lock.spinlock, irqflags);
dev->lock.user_waiters++;
- spin_unlock(&dev->lock.spinlock);
+ spin_unlock_irqrestore(&dev->lock.spinlock, irqflags);
for (;;) {
__set_current_state(TASK_INTERRUPTIBLE);
if (!dev->lock.hw_lock) {
@@ -95,9 +96,9 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
break;
}
}
- spin_lock(&dev->lock.spinlock);
+ spin_lock_irqsave(&dev->lock.spinlock, irqflags);
dev->lock.user_waiters--;
- spin_unlock(&dev->lock.spinlock);
+ spin_unlock_irqrestore(&dev->lock.spinlock, irqflags);
__set_current_state(TASK_RUNNING);
remove_wait_queue(&dev->lock.lock_queue, &entry);
@@ -198,8 +199,9 @@ int drm_lock_take(struct drm_lock_data *lock_data,
{
unsigned int old, new, prev;
volatile unsigned int *lock = &lock_data->hw_lock->lock;
+ unsigned long irqflags;
- spin_lock(&lock_data->spinlock);
+ spin_lock_irqsave(&lock_data->spinlock, irqflags);
do {
old = *lock;
if (old & _DRM_LOCK_HELD)
@@ -211,7 +213,7 @@ int drm_lock_take(struct drm_lock_data *lock_data,
}
prev = cmpxchg(lock, old, new);
} while (prev != old);
- spin_unlock(&lock_data->spinlock);
+ spin_unlock_irqrestore(&lock_data->spinlock, irqflags);
if (_DRM_LOCKING_CONTEXT(old) == context) {
if (old & _DRM_LOCK_HELD) {
@@ -272,15 +274,16 @@ int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context)
{
unsigned int old, new, prev;
volatile unsigned int *lock = &lock_data->hw_lock->lock;
+ unsigned long irqflags;
- spin_lock(&lock_data->spinlock);
+ spin_lock_irqsave(&lock_data->spinlock, irqflags);
if (lock_data->kernel_waiters != 0) {
drm_lock_transfer(lock_data, 0);
lock_data->idle_has_lock = 1;
- spin_unlock(&lock_data->spinlock);
+ spin_unlock_irqrestore(&lock_data->spinlock, irqflags);
return 1;
}
- spin_unlock(&lock_data->spinlock);
+ spin_unlock_irqrestore(&lock_data->spinlock, irqflags);
do {
old = *lock;
@@ -344,19 +347,20 @@ static int drm_notifier(void *priv)
void drm_idlelock_take(struct drm_lock_data *lock_data)
{
int ret = 0;
+ unsigned long irqflags;
- spin_lock(&lock_data->spinlock);
+ spin_lock_irqsave(&lock_data->spinlock, irqflags);
lock_data->kernel_waiters++;
if (!lock_data->idle_has_lock) {
- spin_unlock(&lock_data->spinlock);
+ spin_unlock_irqrestore(&lock_data->spinlock, irqflags);
ret = drm_lock_take(lock_data, DRM_KERNEL_CONTEXT);
- spin_lock(&lock_data->spinlock);
+ spin_lock_irqsave(&lock_data->spinlock, irqflags);
if (ret == 1)
lock_data->idle_has_lock = 1;
}
- spin_unlock(&lock_data->spinlock);
+ spin_unlock_irqrestore(&lock_data->spinlock, irqflags);
}
EXPORT_SYMBOL(drm_idlelock_take);
@@ -364,8 +368,9 @@ void drm_idlelock_release(struct drm_lock_data *lock_data)
{
unsigned int old, prev;
volatile unsigned int *lock = &lock_data->hw_lock->lock;
+ unsigned long irqflags;
- spin_lock(&lock_data->spinlock);
+ spin_lock_irqsave(&lock_data->spinlock, irqflags);
if (--lock_data->kernel_waiters == 0) {
if (lock_data->idle_has_lock) {
do {
@@ -376,7 +381,7 @@ void drm_idlelock_release(struct drm_lock_data *lock_data)
lock_data->idle_has_lock = 0;
}
}
- spin_unlock(&lock_data->spinlock);
+ spin_unlock_irqrestore(&lock_data->spinlock, irqflags);
}
EXPORT_SYMBOL(drm_idlelock_release);