gpu: nvgpu: handle smid table init failures

Handle the possibility of failing gr init due to smid table initialization
failures

bug 2004378

Change-Id: I904b918a0ea31c32292edb3ab8ac3b1459c38a28
Signed-off-by: David Nieto <dmartineznie@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1581661
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index 700dcdf8..1b9ecd86 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -1164,8 +1164,12 @@ int gr_gk20a_init_fs_state(struct gk20a *g)
 
         gk20a_dbg_fn("");
 
-        if (g->ops.gr.init_sm_id_table)
+        if (g->ops.gr.init_sm_id_table) {
                 g->ops.gr.init_sm_id_table(g);
+                /* Is table empty ? */
+                if (g->gr.no_of_sm == 0)
+                        return -EINVAL;
+        }
 
         for (sm_id = 0; sm_id < g->gr.no_of_sm; sm_id++) {
                 tpc_index = g->gr.sm_to_cluster[sm_id].tpc_index;
@@ -1459,7 +1463,9 @@ static int gr_gk20a_init_golden_ctx_image(struct gk20a *g,
         g->ops.gr.commit_global_timeslice(g, c, false);
 
         /* floorsweep anything left */
-        g->ops.gr.init_fs_state(g);
+        err = g->ops.gr.init_fs_state(g);
+        if (err)
+                goto clean_up;
 
         err = gr_gk20a_wait_idle(g, gk20a_get_gr_idle_timeout(g),
                                  GR_IDLE_CHECK_DEFAULT);