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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-12-16 12:58:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-12-16 12:58:39 -0800 |
| commit | ed4a51842a9d9e618d4f4c31349b15b974dba5df (patch) | |
| tree | 1fc8428b931898fcc9c9a2367738aaa075772cc5 /drivers/gpu | |
| parent | 64b3dcc35e8dcaa3032aa6aba416d05f41ead959 (diff) | |
| download | linux-ed4a51842a9d9e618d4f4c31349b15b974dba5df.tar.gz linux-ed4a51842a9d9e618d4f4c31349b15b974dba5df.tar.bz2 linux-ed4a51842a9d9e618d4f4c31349b15b974dba5df.zip | |
Revert "drm/i915: fix infinite recursion on unbind due to ilk vt-d w/a"
This reverts commit eb1711bb94991e93669c5a1b5f84f11be2d51ea1.
It blows up the i915 seqno tracking, resulting in the
BUG_ON(seqno == 0);
in i915_wait_request() triggering, which will cause lock-ups.
See for example
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/903010
https://lkml.org/lkml/2011/12/14/395
Reported-requested-and-tested-by: Dirk Hohndel <dirk@hohndel.org>
Reported-by: Richard Eames <Richard.Eames@flinders.edu.au>
Reported-by: Rocko Requin <rockorequin@hotmail.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Keith Packard <keithp@keithp.com>
Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 60ff1b63b568..8359dc777041 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2026,13 +2026,8 @@ i915_wait_request(struct intel_ring_buffer *ring, * to handle this, the waiter on a request often wants an associated * buffer to have made it to the inactive list, and we would need * a separate wait queue to handle that. - * - * To avoid a recursion with the ilk VT-d workaround (that calls - * gpu_idle when unbinding objects with interruptible==false) don't - * retire requests in that case (because it might call unbind if the - * active list holds the last reference to the object). */ - if (ret == 0 && dev_priv->mm.interruptible) + if (ret == 0) i915_gem_retire_requests_ring(ring); return ret; |