gpu: nvgpu: Do not panic if PMU/regops not supported

Fix panics when using regops when PMU is disabled, or when whitelists
have not been defined.

Bug 1592505

Change-Id: I316c98147c54be7b1114ad23049ce3a634d4805e
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/671841

1 files changed, 12 insertions, 6 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/regops_gk20a.c b/drivers/gpu/nvgpu/gk20a/regops_gk20a.c
index 04659bcf..11ab7bc3 100644
--- a/drivers/gpu/nvgpu/gk20a/regops_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/regops_gk20a.c
@@ -561,7 +561,8 @@ static bool check_whitelists(struct dbg_session_gk20a *dbg_s,
 
         if (op->type == REGOP(TYPE_GLOBAL)) {
                 /* search global list */
-                valid = !!bsearch(&offset,
+                valid = g->ops.regops.get_global_whitelist_ranges &&
+                        !!bsearch(&offset,
                         g->ops.regops.get_global_whitelist_ranges(),
                         g->ops.regops.get_global_whitelist_ranges_count(),
                         sizeof(*g->ops.regops.get_global_whitelist_ranges()),
@@ -570,7 +571,8 @@ static bool check_whitelists(struct dbg_session_gk20a *dbg_s,
                 /* if debug session and channel is bound search context list */
                 if ((!valid) && (!dbg_s->is_profiler && dbg_s->ch)) {
                         /* binary search context list */
-                        valid = !!bsearch(&offset,
+                        valid = g->ops.regops.get_context_whitelist_ranges &&
+                                !!bsearch(&offset,
                         g->ops.regops.get_context_whitelist_ranges(),
                         g->ops.regops.get_context_whitelist_ranges_count(),
                         sizeof(*g->ops.regops.get_context_whitelist_ranges()),
@@ -579,7 +581,8 @@ static bool check_whitelists(struct dbg_session_gk20a *dbg_s,
 
                 /* if debug session and channel is bound search runcontrol list */
                 if ((!valid) && (!dbg_s->is_profiler && dbg_s->ch)) {
-                        valid = linear_search(offset,
+                        valid = g->ops.regops.get_runcontrol_whitelist &&
+                                linear_search(offset,
                                 g->ops.regops.get_runcontrol_whitelist(),
                                 g->ops.regops.get_runcontrol_whitelist_count());
                 }
@@ -592,7 +595,8 @@ static bool check_whitelists(struct dbg_session_gk20a *dbg_s,
                 }
 
                 /* binary search context list */
-                valid = !!bsearch(&offset,
+                valid = g->ops.regops.get_context_whitelist_ranges &&
+                        !!bsearch(&offset,
                         g->ops.regops.get_context_whitelist_ranges(),
                         g->ops.regops.get_context_whitelist_ranges_count(),
                         sizeof(*g->ops.regops.get_context_whitelist_ranges()),
@@ -600,13 +604,15 @@ static bool check_whitelists(struct dbg_session_gk20a *dbg_s,
 
                 /* if debug session and channel is bound search runcontrol list */
                 if ((!valid) && (!dbg_s->is_profiler && dbg_s->ch)) {
-                        valid = linear_search(offset,
+                        valid = g->ops.regops.get_runcontrol_whitelist &&
+                                linear_search(offset,
                                 g->ops.regops.get_runcontrol_whitelist(),
                                 g->ops.regops.get_runcontrol_whitelist_count());
                 }
 
         } else if (op->type == REGOP(TYPE_GR_CTX_QUAD)) {
-                valid = linear_search(offset,
+                valid = g->ops.regops.get_qctl_whitelist &&
+                        linear_search(offset,
                                 g->ops.regops.get_qctl_whitelist(),
                                 g->ops.regops.get_qctl_whitelist_count());
         }