gpu: nvgpu: remove use of mutex_is_locked()

mutex_is_locked() API is defined on Linux only
and not on other OS like QNX.

Hence remove use of this API for OS abstraction
support to nvgpu.

Instead of using mutex_is_locked(), use
mutex_trylock() for same purpose

Jira NVGPU-13

Change-Id: I542daf20a2294153da8e8bfe89e0dc0387297523
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1297184
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index 3dda1cbf..376a64b0 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -906,7 +906,6 @@ static void gk20a_free_channel(struct channel_gk20a *ch, bool force)
         struct dbg_session_gk20a *dbg_s;
         struct dbg_session_data *session_data, *tmp_s;
         struct dbg_session_channel_data *ch_data, *tmp;
-        bool was_reset;
 
         gk20a_dbg_fn("");
 
@@ -953,13 +952,12 @@ static void gk20a_free_channel(struct channel_gk20a *ch, bool force)
         if (g->fifo.deferred_reset_pending) {
                 gk20a_dbg(gpu_dbg_intr | gpu_dbg_gpu_dbg, "engine reset was"
                            " deferred, running now");
-                was_reset = mutex_is_locked(&g->fifo.gr_reset_mutex);
-                mutex_lock(&g->fifo.gr_reset_mutex);
                 /* if lock is already taken, a reset is taking place
                 so no need to repeat */
-                if (!was_reset)
+                if (mutex_trylock(&g->fifo.gr_reset_mutex)) {
                         gk20a_fifo_deferred_reset(g, ch);
-                mutex_unlock(&g->fifo.gr_reset_mutex);
+                        mutex_unlock(&g->fifo.gr_reset_mutex);
+                }
         }
         mutex_unlock(&f->deferred_reset_mutex);