gpu: nvgpu: Free the channel used semaphore index

Free the channel used semaphore index during gk20a_free_channel().

Bug 1793819

Change-Id: I4215d05f7f3ba0636e2abb1803011711c8a38301
Signed-off-by: Lakshmanan M <lm@nvidia.com>
Reviewed-on: http://git-master/r/1196877
(cherry picked from commit 2c5720de506caac29629f6a1c578e6da80b1a135)
Reviewed-on: http://git-master/r/1198883
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/semaphore_gk20a.h b/drivers/gpu/nvgpu/gk20a/semaphore_gk20a.h
index 58081b56..29a01ab8 100644
--- a/drivers/gpu/nvgpu/gk20a/semaphore_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/semaphore_gk20a.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2014-2016, 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,
@@ -174,6 +174,7 @@ void gk20a_semaphore_pool_put(struct gk20a_semaphore_pool *p);
 struct gk20a_semaphore *gk20a_semaphore_alloc(struct channel_gk20a *ch);
 void gk20a_semaphore_put(struct gk20a_semaphore *s);
 void gk20a_semaphore_get(struct gk20a_semaphore *s);
+void gk20a_semaphore_free_hw_sema(struct channel_gk20a *ch);
 
 /*
  * Return the address of a specific semaphore.