[PATCH 1/1] drm/ttm: return -EBUSY if waiting for busy BO fails

[Kuehling, Felix]

Returning -EAGAIN prevents ttm_bo_mem_space from trying alternate
placements and can lead to live-locks in amdgpu_cs, retrying
indefinitely and never succeeding.

Fixes: cfcc52e477e4 ("drm/ttm: fix busy memory to fail other user v10")
CC: Christian Koenig <Christian.Koenig at amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling at amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index c7de667d482a..58c403eda04e 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -827,7 +827,7 @@ static int ttm_mem_evict_wait_busy(struct ttm_buffer_object *busy_bo,
 	if (!r)
 		reservation_object_unlock(busy_bo->resv);
 
-	return r == -EDEADLK ? -EAGAIN : r;
+	return r == -EDEADLK ? -EBUSY : r;
 }
 
 static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
-- 
2.17.1