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/gm20b/fifo_gm20b.c b/drivers/gpu/nvgpu/gm20b/fifo_gm20b.c
index d6429871..f4ddd92f 100644
--- a/drivers/gpu/nvgpu/gm20b/fifo_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/fifo_gm20b.c
@@ -210,13 +210,13 @@ void gm20b_fifo_tsg_verify_status_ctx_reload(struct channel_gk20a *ch)
 
         /* If CTX_RELOAD is set on a channel, move it to some other channel */
         if (gk20a_fifo_channel_status_is_ctx_reload(ch->g, ch->chid)) {
-                down_read(&tsg->ch_list_lock);
+                nvgpu_rwsem_down_read(&tsg->ch_list_lock);
                 nvgpu_list_for_each_entry(temp_ch, &tsg->ch_list, channel_gk20a, ch_entry) {
                         if (temp_ch->chid != ch->chid) {
                                 gm20b_fifo_set_ctx_reload(temp_ch);
                                 break;
                         }
                 }
-                up_read(&tsg->ch_list_lock);
+                nvgpu_rwsem_up_read(&tsg->ch_list_lock);
         }
 }