gpu: nvgpu: cancel all wdt timeouts while handling SCHED errors

A SCHED error might cause multiple channels' watchdogs to trigger
simultaneously

Hence, to avoid this conflict cancel watchdog timeout on all
channels before recovering from SCHED errors

Also, define API gk20a_channel_timeout_stop_all_channels()
to cancel wdt timeout on all channels

Bug 200133289

Change-Id: I8324c397891f0a711327b77d0677cd6718af6d01
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/810959
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
index 20600207..280c50b1 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
@@ -256,4 +256,5 @@ void channel_gk20a_free_inst(struct gk20a *g, struct channel_gk20a *ch);
 int channel_gk20a_setup_ramfc(struct channel_gk20a *c,
                         u64 gpfifo_base, u32 gpfifo_entries, u32 flags);
 void channel_gk20a_enable(struct channel_gk20a *ch);
+void gk20a_channel_timeout_stop_all_channels(struct gk20a *g);
 #endif /* CHANNEL_GK20A_H */