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drm: fix fd closing ordering. 

If the master fd goes away before the aiglx fd, we try and get a lock
that actually doesn't exist.
main
Dave Airlie 2008-03-12 14:48:01 +10:00
parent cf1a2499ed
commit 981f515e2b
1 changed files with 52 additions and 48 deletions
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100
linux-core/drm_fops.c
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@ -402,59 +402,63 @@ int drm_release(struct inode *inode, struct file *filp)
current->pid, (long)old_encode_dev(file_priv->minor->device),
dev->open_count);
if (dev->driver->reclaim_buffers_locked && file_priv->master->lock.hw_lock) {
if (drm_i_have_hw_lock(dev, file_priv)) {
dev->driver->reclaim_buffers_locked(dev, file_priv);
} else {
unsigned long _end=jiffies + 3*DRM_HZ;
int locked = 0;
drm_idlelock_take(&file_priv->master->lock);
/*
* Wait for a while.
*/
do{
spin_lock(&file_priv->master->lock.spinlock);
locked = file_priv->master->lock.idle_has_lock;
spin_unlock(&file_priv->master->lock.spinlock);
if (locked)
break;
schedule();
} while (!time_after_eq(jiffies, _end));
if (!locked) {
DRM_ERROR("reclaim_buffers_locked() deadlock. Please rework this\n"
"\tdriver to use reclaim_buffers_idlelocked() instead.\n"
"\tI will go on reclaiming the buffers anyway.\n");
/* if the master has gone away we can't do anything with the lock */
if (file_priv->minor->master) {
if (dev->driver->reclaim_buffers_locked && file_priv->master->lock.hw_lock) {
if (drm_i_have_hw_lock(dev, file_priv)) {
dev->driver->reclaim_buffers_locked(dev, file_priv);
} else {
unsigned long _end=jiffies + 3*DRM_HZ;
int locked = 0;
drm_idlelock_take(&file_priv->master->lock);
/*
* Wait for a while.
*/
do{
spin_lock(&file_priv->master->lock.spinlock);
locked = file_priv->master->lock.idle_has_lock;
spin_unlock(&file_priv->master->lock.spinlock);
if (locked)
break;
schedule();
} while (!time_after_eq(jiffies, _end));
if (!locked) {
DRM_ERROR("reclaim_buffers_locked() deadlock. Please rework this\n"
"\tdriver to use reclaim_buffers_idlelocked() instead.\n"
"\tI will go on reclaiming the buffers anyway.\n");
}
dev->driver->reclaim_buffers_locked(dev, file_priv);
drm_idlelock_release(&file_priv->master->lock);
}
dev->driver->reclaim_buffers_locked(dev, file_priv);
drm_idlelock_release(&file_priv->master->lock);
}
}
if (dev->driver->reclaim_buffers_idlelocked && file_priv->master->lock.hw_lock) {
drm_idlelock_take(&file_priv->master->lock);
dev->driver->reclaim_buffers_idlelocked(dev, file_priv);
drm_idlelock_release(&file_priv->master->lock);
}
if (drm_i_have_hw_lock(dev, file_priv)) {
DRM_DEBUG("File %p released, freeing lock for context %d\n",
filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
drm_lock_free(&file_priv->master->lock,
_DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
}
if (dev->driver->reclaim_buffers_idlelocked && file_priv->master->lock.hw_lock) {
drm_idlelock_take(&file_priv->master->lock);
dev->driver->reclaim_buffers_idlelocked(dev, file_priv);
drm_idlelock_release(&file_priv->master->lock);
}
if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
!dev->driver->reclaim_buffers_locked) {
dev->driver->reclaim_buffers(dev, file_priv);
if (drm_i_have_hw_lock(dev, file_priv)) {
DRM_DEBUG("File %p released, freeing lock for context %d\n",
filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
drm_lock_free(&file_priv->master->lock,
_DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
}
if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
!dev->driver->reclaim_buffers_locked) {
dev->driver->reclaim_buffers(dev, file_priv);
}
}
drm_fasync(-1, filp, 0);