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| author | Eric Anholt <eric@anholt.net> | 2009-02-24 22:14:12 -0800 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2009-03-03 09:53:05 +1000 |
| commit | 299eb93c5f651b2bc368ada67d8471e4c575fa21 (patch) | |
| tree | 342c43be5b83b399a80b9a1f2e9b4ff1f0cd6eca /drivers/gpu | |
| parent | fda714c29cdf360464059044b221450decb4b913 (diff) | |
| download | lwn-299eb93c5f651b2bc368ada67d8471e4c575fa21.tar.gz lwn-299eb93c5f651b2bc368ada67d8471e4c575fa21.zip | |
drm/i915: Fix use-before-null-check in i915_irq_emit().
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>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 548ff2c66431..87b6b603469e 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -383,12 +383,13 @@ int i915_irq_emit(struct drm_device *dev, void *data, drm_i915_irq_emit_t *emit = data; int result; - RING_LOCK_TEST_WITH_RETURN(dev, file_priv); - if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } + + RING_LOCK_TEST_WITH_RETURN(dev, file_priv); + mutex_lock(&dev->struct_mutex); result = i915_emit_irq(dev); mutex_unlock(&dev->struct_mutex); |