gpu: nvgpu: skip WFI for KEPLER_C channels

In channel_finish(), we submit WFI for all the channels
including channels with KEPLER_C class.

Since there is no need to submit WFI for channels with
KEPLER_C class, we can optimize to skip submitting
WFI and directly wait on last submit fence

Bug 1534272

Change-Id: I3838416cf22122728e7f1008e01d77b14a35deba
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index ef3d8729..de82be36 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -1728,14 +1728,14 @@ int gk20a_channel_finish(struct channel_gk20a *ch, unsigned long timeout)
         if (ch->has_timedout)
                 return -ETIMEDOUT;
 
-        if (!(fence->valid && fence->wfi)) {
+        if (!(fence->valid && fence->wfi) && ch->obj_class != KEPLER_C) {
                 gk20a_dbg_fn("issuing wfi, incr to finish the channel");
                 err = gk20a_channel_submit_wfi(ch);
         }
         if (err)
                 return err;
 
-        BUG_ON(!(fence->valid && fence->wfi));
+        BUG_ON(!(fence->valid && fence->wfi) && ch->obj_class != KEPLER_C);
 
         gk20a_dbg_fn("waiting for channel to finish thresh:%d sema:%p",
                       fence->thresh, fence->semaphore);