gpu: nvgpu: Do not free NULL sync_fence

When allocating a fence fails, free sync_fence only if one has been
created.

Change-Id: I2ecefd25c4e000f415b28c7c2b01b91654d6ef43
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1249958
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: Konsta Holtta <kholtta@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 737ad1b1..e046152d 100644
--- a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
@@ -245,7 +245,8 @@ int gk20a_fence_from_semaphore(
         gk20a_init_fence(f, &gk20a_semaphore_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 -EINVAL;
         }