gpu: nvgpu: Handling null pointer

Handling null pointer in gk20a_fence_is_expired.

Bug 200117724

Change-Id: I0f9307a5f8b82bf990b6ddaea1a408d4f3f376fb
Signed-off-by: Gagan Grover <ggrover@nvidia.com>
Reviewed-on: http://git-master/r/777796
(cherry picked from commit dbf5bae53e0e7862754faba78eab84284786ecb3)
Reviewed-on: http://git-master/r/795356
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
index def916b3..54a288cd 100644
--- a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2014-2015, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -71,7 +71,10 @@ int gk20a_fence_wait(struct gk20a_fence *f, int timeout)
 
 bool gk20a_fence_is_expired(struct gk20a_fence *f)
 {
-        return f->ops->is_expired(f);
+        if (f && f->ops)
+                return f->ops->is_expired(f);
+        else
+                return true;
 }
 
 int gk20a_fence_install_fd(struct gk20a_fence *f)