drm/vc4: Fix -ERESTARTSYS error return from BO waits.



This caused the wait ioctls to claim that waiting had completed when
we actually got interrupted by a signal before it was done.  Fixes
broken rendering throttling that produced serious lag in X window
dragging.

Signed-off-by: Eric Anholt <eric@anholt.net>

parent 2c68f1fc

drivers/gpu/drm/vc4/vc4_gem.c

+2 −4

Original line number	Diff line number	Diff line
		@@ -340,12 +340,10 @@ vc4_wait_for_seqno(struct drm_device *dev, uint64_t seqno, uint64_t timeout_ns,
		finish_wait(&vc4->job_wait_queue, &wait);
		trace_vc4_wait_for_seqno_end(dev, seqno);

		if (ret && ret != -ERESTARTSYS) {
		if (ret && ret != -ERESTARTSYS)
		DRM_ERROR("timeout waiting for render thread idle\n");
		return ret;
		}

		return 0;
		return ret;
		}

		static void