gpu: nvgpu: Use nvgpu_cond for channel refcount

Use nvgpu_cond for waiting for all channel accesses to finalize
before closing a channel, and for signalling for the same event.

JIRA NVGPU-14

Change-Id: Ifac14ad9afe5c44d4443b4a4a94a4d0ad2ea7053
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1469764
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: Lakshmanan M <lm@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
index 3312f8f1..ea77985e 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
@@ -24,6 +24,7 @@
 
 #include <nvgpu/lock.h>
 #include <nvgpu/timers.h>
+#include <nvgpu/cond.h>
 
 struct gk20a;
 struct gr_gk20a;
@@ -169,7 +170,7 @@ struct channel_gk20a {
         struct nvgpu_spinlock ref_obtain_lock;
         bool referenceable;
         atomic_t ref_count;
-        wait_queue_head_t ref_count_dec_wq;
+        struct nvgpu_cond ref_count_dec_wq;
 #if GK20A_CHANNEL_REFCOUNT_TRACKING
         /*
          * Ring buffer for most recent refcount gets and puts. Protected by