drm/i915: Check for timeout completion when waiting for the rq to submitted
authorChris Wilson <chris@chris-wilson.co.uk>
Wed, 8 Feb 2017 18:12:38 +0000 (18:12 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Thu, 9 Feb 2017 09:26:32 +0000 (09:26 +0000)
commit969bb72cbfd906d347cf76dc9b8c8dbaf83ba27a
treeb63940b8c8e82df215e865fc259ae087bd8b1761
parente81ecb5e31db6c2a259d694738cf620d9fa70861
drm/i915: Check for timeout completion when waiting for the rq to submitted

We first wait for a request to be submitted to hw and assigned a seqno,
before we can wait for the hw to signal completion (otherwise we don't
know the hw id we need to wait upon). Whilst waiting for the request to
be submitted, we may exceed the user's timeout and need to propagate the
error back.

v2: Make ETIME into an error from wait_for_execute for consistent exit
handling.

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Fixes: 4680816be336 ("drm/i915: Wait first for submission, before waiting for request completion")
Testcase: igt/gem_wait/basic-await
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.10-rc1+
Cc: stable@vger.kernel.org
Link: http://patchwork.freedesktop.org/patch/msgid/20170208181238.7232-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
drivers/gpu/drm/i915/i915_gem_request.c