1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
index d8e59f7b58b2..524cc1a2c1fa 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -1014,7 +1014,8 @@ ttm_dma_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
         if (list_empty(&_manager->pools))
                 return SHRINK_STOP;
 
-        mutex_lock(&_manager->lock);
+        if (!mutex_trylock(&_manager->lock))
+                return SHRINK_STOP;
         if (!_manager->npools)
                 goto out;
         pool_offset = ++start_pool % _manager->npools;
@@ -1047,7 +1048,8 @@ ttm_dma_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
         struct device_pools *p;
         unsigned long count = 0;
 
-        mutex_lock(&_manager->lock);
+        if (!mutex_trylock(&_manager->lock))
+                return 0;
         list_for_each_entry(p, &_manager->pools, pools)
                 count += p->pool->npages_free;
         mutex_unlock(&_manager->lock);