[PATCH] drm/ttm: drop the spin in delayed delete if the trylock doesn't work

He, Roger Hongbo.He at amd.com
Fri Dec 22 02:05:11 UTC 2017


Reviewed-by: Roger He <Hongbo.He at amd.com>

-----Original Message-----
From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of Christian K?nig
Sent: Friday, December 22, 2017 2:06 AM
To: dri-devel at lists.freedesktop.org; amd-gfx at lists.freedesktop.org
Subject: [PATCH] drm/ttm: drop the spin in delayed delete if the trylock doesn't work

Thomas actually noticed that, but I didn't realized what he meant until now.

Signed-off-by: Christian K├Ânig <christian.koenig at amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 60bb5c12b568..84dfa2368a72 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -592,6 +592,8 @@ static bool ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
 
 		} else if (reservation_object_trylock(bo->resv)) {
 			ttm_bo_cleanup_refs(bo, false, !remove_all, true);
+		} else {
+			spin_unlock(&glob->lru_lock);
 		}
 
 		kref_put(&bo->list_kref, ttm_bo_release_list);
--
2.11.0

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