gpu: nvgpu: Use nvgpu_rwsem as TSG channel lock

Use abstract nvgpu_rwsem as TSG channel list lock instead of the Linux
specific rw_semaphore.

JIRA NVGPU-259

Change-Id: I41a38b29d4651838b1962d69f102af1384e12cb6
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1579935
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index 1ade6b6a..57c1c0bc 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -5091,7 +5091,7 @@ static void gk20a_gr_set_error_notifier(struct gk20a *g,
 
                 if (gk20a_is_channel_marked_as_tsg(ch)) {
                         tsg = &g->fifo.tsg[ch->tsgid];
-                        down_read(&tsg->ch_list_lock);
+                        nvgpu_rwsem_down_read(&tsg->ch_list_lock);
                         list_for_each_entry(ch_tsg, &tsg->ch_list, ch_entry) {
                                 if (gk20a_channel_get(ch_tsg)) {
                                         gk20a_set_error_notifier(ch_tsg,
@@ -5099,7 +5099,7 @@ static void gk20a_gr_set_error_notifier(struct gk20a *g,
                                         gk20a_channel_put(ch_tsg);
                                 }
                         }
-                        up_read(&tsg->ch_list_lock);
+                        nvgpu_rwsem_up_read(&tsg->ch_list_lock);
                 } else {
                         gk20a_set_error_notifier(ch, error_notifier);
                 }