gpu: nvgpu: fix possible NULL dereference

Coverity id : 20260

Bug 1416640

Change-Id: I6ca8df2ed001df99ad46e476b1fe4de9f1346786
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/922362
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
index ae19d36f..7a3f90e9 100644
--- a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
@@ -217,7 +217,8 @@ struct gk20a_fence *gk20a_fence_from_syncpt(struct platform_device *host1x_pdev,
         f = alloc_fence(&gk20a_syncpt_fence_ops, sync_fence, wfi);
         if (!f) {
 #ifdef CONFIG_SYNC
-                sync_fence_put(sync_fence);
+                if (sync_fence)
+                        sync_fence_put(sync_fence);
 #endif
                 return NULL;
         }