From 0449ae9f815461259ccbbb051a759beb891f5461 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Wed, 8 Feb 2017 18:12:38 +0000 Subject: [PATCH] drm/i915: Check for timeout completion when waiting for the rq to submitted BugLink: http://bugs.launchpad.net/bugs/1673118 commit 44a027058b24541cc7ec499e6fb91db4b130648a upstream. 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 Fixes: 4680816be336 ("drm/i915: Wait first for submission, before waiting for request completion") Testcase: igt/gem_wait/basic-await Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Cc: Joonas Lahtinen Cc: # v4.10-rc1+ Link: http://patchwork.freedesktop.org/patch/msgid/20170208181238.7232-1-chris@chris-wilson.co.uk Reviewed-by: Tvrtko Ursulin (cherry picked from commit 969bb72cbfd906d347cf76dc9b8c8dbaf83ba27a) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman Signed-off-by: Tim Gardner --- drivers/gpu/drm/i915/i915_gem_request.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index b8f403faadbb..d7958dc26d21 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -1011,8 +1011,13 @@ __i915_request_wait_for_execute(struct drm_i915_gem_request *request, break; } + if (!timeout) { + timeout = -ETIME; + break; + } + timeout = io_schedule_timeout(timeout); - } while (timeout); + } while (1); finish_wait(&request->execute.wait, &wait); if (flags & I915_WAIT_LOCKED) -- 2.39.2