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From 0304e9381edf30280122d981e5a1b8dedc4c003f Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 25 Jan 2016 14:32:41 -0800
Subject: [PATCH] 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>
---
drivers/gpu/drm/vc4/vc4_gem.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -352,12 +352,10 @@ vc4_wait_for_seqno(struct drm_device *de
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
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