GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-04-01 12:04:08 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

drm/i915: Fix use-before-null-check in i915_irq_emit().

Browse source 
This could be triggered by a client asking to emit an irq when the device
wasn't initialized.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Eric Anholt 2009-02-24 22:14:12 -08:00 • committed by Dave Airlie
parent fda714c29c
commit 299eb93c5f
1 changed files with 3 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/gpu/drm/i915/i915_irq.c
View file

@ -383,12 +383,13 @@ int i915_irq_emit(struct drm_device *dev, void *data,
drm_i915_irq_emit_t *emit = data; drm_i915_irq_emit_t *emit = data;
int result; int result;
RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
if (!dev_priv) { if (!dev_priv) {
DRM_ERROR("called with no initialization\n"); DRM_ERROR("called with no initialization\n");
return -EINVAL; return -EINVAL;
} }
RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
mutex_lock(&dev->struct_mutex); mutex_lock(&dev->struct_mutex);
result = i915_emit_irq(dev); result = i915_emit_irq(dev);
mutex_unlock(&dev->struct_mutex); mutex_unlock(&dev->struct_mutex);