gpu: nvgpu: check return value of mutex_init in CDE code

- check return value of nvgpu_mutex_init in cde_gk20a.c
- add corresponding nvgpu_mutex_destroy calls

Jira NVGPU-13

Change-Id: I99f59d191cc81eff4a330557b864925d36fc4b3d
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1321287
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
index d19479a2..c8434f3d 100644
--- a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
@@ -155,6 +155,8 @@ __releases(&cde_app->mutex)
         nvgpu_mutex_acquire(&cde_app->mutex);
         gk20a_cde_stop(g);
         nvgpu_mutex_release(&cde_app->mutex);
+
+        nvgpu_mutex_destroy(&cde_app->mutex);
 }
 
 void gk20a_cde_suspend(struct gk20a *g)
@@ -1301,7 +1303,10 @@ __releases(&cde_app->mutex)
 
         gk20a_dbg(gpu_dbg_fn | gpu_dbg_cde_ctx, "cde: init");
 
-        nvgpu_mutex_init(&cde_app->mutex);
+        err = nvgpu_mutex_init(&cde_app->mutex);
+        if (err)
+                return err;
+
         nvgpu_mutex_acquire(&cde_app->mutex);
 
         INIT_LIST_HEAD(&cde_app->free_contexts);
@@ -1316,6 +1321,10 @@ __releases(&cde_app->mutex)
 
         nvgpu_mutex_release(&cde_app->mutex);
         gk20a_dbg(gpu_dbg_cde_ctx, "cde: init finished: %d", err);
+
+        if (err)
+                nvgpu_mutex_destroy(&cde_app->mutex);
+
         return err;
 }