gpu: nvgpu: check return value of mutex_init in pstate.c

- check return value of nvgpu_mutex_init in pstate.c
- add new callback gk20a_deinit_pstate_support() to
  deinitialize pstate support
- add corresponding nvgpu_mutex_destroy calls

Jira NVGPU-13

Change-Id: I206bf2324e8fe95f4ed52c29ac5d8981327632b2
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1321296
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/pstate/pstate.h b/drivers/gpu/nvgpu/pstate/pstate.h
index 22ba98b9..406f4226 100644
--- a/drivers/gpu/nvgpu/pstate/pstate.h
+++ b/drivers/gpu/nvgpu/pstate/pstate.h
@@ -54,6 +54,7 @@ struct pstates {
 };
 
 int gk20a_init_pstate_support(struct gk20a *g);
+void gk20a_deinit_pstate_support(struct gk20a *g);
 int gk20a_init_pstate_pmu_support(struct gk20a *g);
 
 struct clk_set_info *pstate_get_clk_set_info(struct gk20a *g, u32 pstate_num,