1 files changed, 22 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index 4d62d8e9..072f1777 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -2212,6 +2212,22 @@ int gk20a_fifo_tsg_unbind_channel_verify_status(struct channel_gk20a *ch)
         return 0;
 }
 
+static bool gk20a_fifo_tsg_is_multi_channel(struct tsg_gk20a *tsg)
+{
+        bool ret = false;
+
+        nvgpu_rwsem_down_read(&tsg->ch_list_lock);
+        if (nvgpu_list_first_entry(&tsg->ch_list, channel_gk20a,
+                                   ch_entry) !=
+            nvgpu_list_last_entry(&tsg->ch_list, channel_gk20a,
+                                   ch_entry)) {
+                ret = true;
+        }
+        nvgpu_rwsem_up_read(&tsg->ch_list_lock);
+
+        return ret;
+}
+
 int gk20a_fifo_tsg_unbind_channel(struct channel_gk20a *ch)
 {
         struct gk20a *g = ch->g;
@@ -2237,7 +2253,12 @@ int gk20a_fifo_tsg_unbind_channel(struct channel_gk20a *ch)
                 goto fail_enable_tsg;
         }
 
-        if (g->ops.fifo.tsg_verify_channel_status && !tsg_timedout) {
+        /*
+         * State validation is only necessary if there are multiple channels in
+         * the TSG.
+         */
+        if (gk20a_fifo_tsg_is_multi_channel(tsg) &&
+            g->ops.fifo.tsg_verify_channel_status && !tsg_timedout) {
                 err = g->ops.fifo.tsg_verify_channel_status(ch);
                 if (err) {
                         goto fail_enable_tsg;