android_kernel_motorola_sm6225/drivers/gpu
Dan Carpenter ee0c6bfbd6 drm/i915: take struct_mutex in i915_dma_cleanup()
intel_cleanup_ring_buffer() calls drm_gem_object_unreference() (as
opposed to drm_gem_object_unreference_unlocked()) so it needs to be
called with "struct_mutex" held.  If we don't hold the lock, it triggers
a BUG_ON(!mutex_is_locked(&dev->struct_mutex));

I also audited the other places that call intel_cleanup_ring_buffer()
and they all hold the lock so they're OK.

This was introduced in: 8187a2b70e "drm/i915: introduce
intel_ring_buffer structure (V2)" and it's a regression from v2.6.34.

Addresses: https://bugzilla.kernel.org/show_bug.cgi?id=16247

Signed-off-by: Dan Carpenter <error27@gmail.com>
Reported-by: Benny Halevy <bhalevy@panasas.com>
Tested-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
2010-07-01 15:41:37 -07:00
..
drm drm/i915: take struct_mutex in i915_dma_cleanup() 2010-07-01 15:41:37 -07:00
vga Merge remote branch 'anholt/drm-intel-next' into drm-next 2010-05-19 09:35:51 +10:00
Makefile PCI/GPU: implement VGA arbitration on Linux 2009-09-09 13:29:36 -07:00