linux-kernel - [PATCH v2 02/11] drm/qxl: more fence wait rework

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Date:   Wed, 17 Feb 2021 13:32:04 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Gerd Hoffmann <kraxel@...hat.com>,
        Dave Airlie <airlied@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        virtualization@...ts.linux-foundation.org (open list:DRM DRIVER FOR QXL
        VIRTUAL GPU),
        spice-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR QXL VIRTUAL
        GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 02/11] drm/qxl: more fence wait rework

Move qxl_io_notify_oom() call into wait condition.
That way the driver will call it again if one call
wasn't enough.

Also allows to remove the extra dma_fence_is_signaled()
check and the goto.

Fixes: 5a838e5d5825 ("drm/qxl: simplify qxl_fence_wait")
Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/gpu/drm/qxl/qxl_release.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index 6ed673d75f9f..579c6de10c8e 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -62,16 +62,12 @@ static long qxl_fence_wait(struct dma_fence *fence, bool intr,
 
 	qdev = container_of(fence->lock, struct qxl_device, release_lock);
 
-	if (dma_fence_is_signaled(fence))
-		goto signaled;
-
-	qxl_io_notify_oom(qdev);
 	if (!wait_event_timeout(qdev->release_event,
-				dma_fence_is_signaled(fence),
+				(dma_fence_is_signaled(fence) ||
+				 (qxl_io_notify_oom(qdev), 0)),
 				timeout))
 		return 0;
 
-signaled:
 	cur = jiffies;
 	if (time_after(cur, end))
 		return 0;
-- 
2.29.2