gpu: nvgpu: Fix fake MMU fault for TSGs

When we induce a fake MMU fault, we do not have pointer to a channel.
Use the tsg pointer instead. Also remove the error print in case we
do not have ch pointer.

Change-Id: I14fd75d2b743244915bf32fe39de76097ef5c42f
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/819034

1 files changed, 2 insertions, 7 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index a035cd87..39cb1174 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -1053,16 +1053,11 @@ static bool gk20a_fifo_handle_mmu_fault(
                                 verbose =
                                        gk20a_fifo_set_ctx_mmu_error_tsg(g, tsg);
 
-                        gk20a_fifo_abort_tsg(g, ch->tsgid);
+                        gk20a_fifo_abort_tsg(g, tsg->tsgid);
 
                         /* put back the ref taken early above */
-                        if (referenced_channel) {
+                        if (referenced_channel)
                                 gk20a_channel_put(ch);
-                        } else {
-                                gk20a_err(dev_from_gk20a(g),
-                                                "mmu error in freed tsg channel %d on tsgid %d",
-                                                ch->hw_chid, ch->tsgid);
-                        }
                 } else if (ch) {
                         if (referenced_channel) {
                                 if (!g->fifo.deferred_reset_pending)