gpu: nvgpu: do not touch runlist during recovery

Currently we clear the runlist and re-create it in
scheduled work during fifo recovery process

But we can post-pone this runlist re-generation for
later time i.e. when channel is closed

Hence, remove runlist locks and re-generation from
handle_mmu_fault() methods. Instead of that, disable
gr fifo access at start of recovery and re-enable
it at end of recovery process.

Also, delete scheduled work to re-create runlist.
Re-enable EPLG and fifo access in
finish_mmu_fault_handling() itself.

bug 1470692

Change-Id: I705a6a5236734c7207a01d9a9fa9eca22bdbe7eb
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/449225
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
index e738b152..bed8a361 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
@@ -138,8 +138,6 @@ struct fifo_gk20a {
         u32 mmu_fault_engines;
         bool deferred_reset_pending;
         struct mutex deferred_reset_mutex;
-
-        struct work_struct fault_restore_thread;
 };
 
 int gk20a_init_fifo_support(struct gk20a *g);