gpu: nvgpu: Skip calling undefined prod callbacks

Fix rest of code to not call prod callbacks that are set to NULL.

Bug 1799537

Change-Id: I756bb1f7ef58ba753ac43a2be6f125107be3cf34
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1209133
(cherry picked from commit 5f4d7b42b6101407fde8c4a7dcdd3633eca85ae5)
Reviewed-on: http://git-master/r/1217297
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 9 insertions, 6 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index c5bc5bda..ee42f4d7 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -1323,12 +1323,15 @@ static bool gk20a_fifo_handle_mmu_fault(
         /* Disable power management */
         if (support_gk20a_pmu(g->dev) && g->elpg_enabled)
                 gk20a_pmu_disable_elpg(g);
-        g->ops.clock_gating.slcg_gr_load_gating_prod(g,
-                        false);
-        g->ops.clock_gating.slcg_perf_load_gating_prod(g,
-                        false);
-        g->ops.clock_gating.slcg_ltc_load_gating_prod(g,
-                        false);
+        if (g->ops.clock_gating.slcg_gr_load_gating_prod)
+                g->ops.clock_gating.slcg_gr_load_gating_prod(g,
+                                false);
+        if (g->ops.clock_gating.slcg_perf_load_gating_prod)
+                g->ops.clock_gating.slcg_perf_load_gating_prod(g,
+                                false);
+        if (g->ops.clock_gating.slcg_ltc_load_gating_prod)
+                g->ops.clock_gating.slcg_ltc_load_gating_prod(g,
+                                false);
 
         gr_gk20a_init_cg_mode(g, ELCG_MODE, ELCG_RUN);