]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915/breadcrumbs: Ignore unsubmitted signalers
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 6 Feb 2018 09:46:33 +0000 (09:46 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Wed, 7 Feb 2018 11:05:21 +0000 (11:05 +0000)
commitee9a3c5c599923ceac00c932cf6ab7ef89bf4912
tree2a8a376b27fb42a8b1748181a0540846767c6e7d
parent1cc3614ed4185ca26b29c4b2b94ab5fb7c8fe40d
drm/i915/breadcrumbs: Ignore unsubmitted signalers

When a request is preempted, it is unsubmitted from the HW queue and
removed from the active list of breadcrumbs. In the process, this
however triggers the signaler and it may see the clear rbtree with the
old, and still valid, seqno, or it may match the cleared seqno with the
now zero rq->global_seqno. This confuses the signaler into action and
signaling the fence.

Fixes: 3345d0aef48d ("drm/i915: Remove the preempted request from the execution queue")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.12+
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180206094633.30181-1-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/intel_breadcrumbs.c