drm/i915: Rebind bo if currently bound with incorrect alignment.
authorChris Wilson <chris@chris-wilson.co.uk>
Thu, 27 May 2010 12:18:18 +0000 (13:18 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 5 Jul 2010 18:11:06 +0000 (11:11 -0700)
commit2f2b2a2c2f15ea1ac21d19fed7fc51520d94c65c
tree77f44cae01c5728b443f40a8b8be40c7f963cd67
parentda86663542979859c5b0e8f52aaf6f1745254b27
drm/i915: Rebind bo if currently bound with incorrect alignment.

commit ac0c6b5ad3b3b513e1057806d4b7627fcc0ecc27 upstream.

Whilst pinning the buffer, check that that its current alignment
matches the requested alignment. If it does not, rebind.

This should clear up any final render errors whilst resuming,
for reference:

  Bug 27070 - [i915] Page table errors with empty ringbuffer
  https://bugs.freedesktop.org/show_bug.cgi?id=27070

  Bug 15502 -  render error detected, EIR: 0x00000010
  https://bugzilla.kernel.org/show_bug.cgi?id=15502

  Bug 13844 -  i915 error: "render error detected"
  https://bugzilla.kernel.org/show_bug.cgi?id=13844

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/gpu/drm/i915/i915_gem.c