gpu: nvgpu: check return value of sm exception handler

In gr_gp10b_handle_sm_exception(), we do not check return value of
gr_gk20a_handle_sm_exception()

In case SM debug mode is disabled, gr_gk20a_handle_sm_exception()
returns an error. But due to uncaught error we return success from
gr_gp10b_handle_sm_exception() which results in not triggering the
recovery routine and fails the tests

Fix this by checking return value of gr_gk20a_handle_sm_exception()
We then parse ECC errors and then finally return error value back to
caller

Bug 200325081

Change-Id: I0c328a75494b9ca6a070f04c1f984e2653ffd90e
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1521563
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Tested-by: Ashutosh Jain <ashutoshj@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/gr_gp10b.c b/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
index 6ef27abf..67a38e6e 100644
--- a/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
@@ -132,7 +132,7 @@ static int gr_gp10b_handle_sm_exception(struct gk20a *g,
         u32 lrf_single_count_delta, lrf_double_count_delta;
         u32 shm_ecc_status;
 
-        gr_gk20a_handle_sm_exception(g,
+        ret = gr_gk20a_handle_sm_exception(g,
                 gpc, tpc, sm, post_event, fault_ch, hww_global_esr);
 
         /* Check for LRF ECC errors. */