drm/i915: Immediately process a reset before starting waiting
authorChris Wilson <chris@chris-wilson.co.uk>
Thu, 23 Feb 2017 07:44:21 +0000 (07:44 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Thu, 23 Feb 2017 14:56:08 +0000 (14:56 +0000)
As we handoff the GPU reset to the waiter, we need to check we don't
miss a wakeup if it has already been sent prior to us starting the wait.

v2: Tweak checking for reset to be clear to the need before sleeping
after changing the task state.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170223074422.4125-16-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
drivers/gpu/drm/i915/i915_gem_request.c

index 0582bb7a0b5b51166c894f721402d67796d04495..9669747d1822e5364744d8d57e42ffcb79beafb8 100644 (file)
@@ -1126,6 +1126,9 @@ restart:
                 */
                goto wakeup;
 
+       if (flags & I915_WAIT_LOCKED)
+               __i915_wait_request_check_and_reset(req);
+
        for (;;) {
                if (signal_pending_state(state, current)) {
                        timeout = -ERESTARTSYS;