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drm: Delete the vblank timer synchronously at cleanup time

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A race condition exists in drm_vblank_cleanup() if the vblank disable
timer callback runs after freeing the memory that its callback function
tries to access. Fix this by deleting the timer synchronously.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Laurent Pinchart 2012-05-17 13:27:19 +02:00 committed by Dave Airlie
parent af437cfd35
commit 7eb3b2c83d
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_irq.c
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@ -189,7 +189,7 @@ void drm_vblank_cleanup(struct drm_device *dev)
if (dev->num_crtcs == 0)
return;
del_timer(&dev->vblank_disable_timer);
del_timer_sync(&dev->vblank_disable_timer);
vblank_disable_fn((unsigned long)dev);