gpu: nvgpu: cs_data should not be forgotten

During poweron/off sequence cyclestats should not
remove cs_data and produce leak.

Bug 200144583

Change-Id: Ibe1ea7d41d5ba9f79a46ead788a84bed29f37ec6
Signed-off-by: Leonid Moiseichuk <lmoiseichuk@nvidia.com>
Reviewed-on: http://git-master/r/999983
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1001882
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Tested-by: Seshendra Gadagottu <sgadagottu@nvidia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/css_gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/css_gr_gk20a.c
index 34910152..3fb003bf 100644
--- a/drivers/gpu/nvgpu/gk20a/css_gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/css_gr_gk20a.c
@@ -1,7 +1,7 @@
 /*
  * GK20A Cycle stats snapshots support (subsystem for gr_gk20a).
  *
- * Copyright (c) 2015, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2015-2016, 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,
@@ -757,4 +757,5 @@ void gr_gk20a_free_cyclestats_snapshot_data(struct gk20a *g)
         mutex_lock(&gr->cs_lock);
         css_gr_free_shared_data(gr);
         mutex_unlock(&gr->cs_lock);
+        mutex_destroy(&gr->cs_lock);
 }