gpu: nvgpu: use deferred_fault_engines for resetting engines during unbind

Engine reset is skipped if channel is disassociated from the tsg.
During unbind, tsg is disassociated before calling deferred
engine reset. Hence any deferred resets don't work
actually.

Engines to be reset is already set in the variable
deferred_fault_engines. Use it.

Bug 200711183

Change-Id: I0c2bdcad1770e0ccd001c208a9ac0cf499a374e1
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2521974
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
(cherry picked from commit 668bd75c1ac84d18f0aa0d0b22145d24405fdc8e)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2524252
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index 049b8da2..aed130e4 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -1602,6 +1602,7 @@ int gk20a_fifo_deferred_reset(struct gk20a *g, struct channel_gk20a *ch)
                 engines = gk20a_fifo_engines_on_id(g, tsg->tsgid, true);
         } else {
                 nvgpu_err(g, "chid: %d is not bound to tsg", ch->chid);
+                engines = g->fifo.deferred_fault_engines;
         }
 
         if (engines == 0U) {