1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index f4b96b7a..a1844a28 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -1,7 +1,7 @@
 /*
  * GK20A Graphics FIFO (gr host)
  *
- * Copyright (c) 2011-2018, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2011-2019, NVIDIA CORPORATION.  All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -2193,6 +2193,11 @@ int gk20a_fifo_tsg_unbind_channel(struct channel_gk20a *ch)
         nvgpu_rwsem_down_write(&tsg->ch_list_lock);
         nvgpu_list_del(&ch->ch_entry);
         ch->tsgid = NVGPU_INVALID_TSG_ID;
+
+        /* another thread could have re-enabled the channel because it was
+         * still on the list at that time, so make sure it's truly disabled
+         */
+        g->ops.fifo.disable_channel(ch);
         nvgpu_rwsem_up_write(&tsg->ch_list_lock);
 
         /*