[committed] amdgcn: Check HSA return codes [PR94629]

[Andrew Stubbs]

This patch adds some additional checking to ensure that the HSA runtime 
call do not return errors.

Previously the return codes were ignored, but failure still detected by 
the output data still having its initial value. This was probably safe, 
but a static analyzer correctly noticed that the status was ignored. 
Anyway, this is probably good practice.

Andrew
amdgcn: Check HSA return codes [PR94629]

Ensure that the returned status values are not ignored.  The old code was
not broken, but this is both safer and satisfies static analysis.

2020-04-23  Andrew Stubbs  <a...@codesourcery.com>

	PR other/94629

	libgomp/
	* plugin/plugin-gcn.c (init_hsa_context): Check return value from
	hsa_iterate_agents.
	(GOMP_OFFLOAD_init_device): Check return values from both calls to
	hsa_agent_iterate_regions.

diff --git a/libgomp/plugin/plugin-gcn.c b/libgomp/plugin/plugin-gcn.c
index dc72c90962c..4c6a4c03b6e 100644
--- a/libgomp/plugin/plugin-gcn.c
+++ b/libgomp/plugin/plugin-gcn.c
@@ -1508,6 +1508,8 @@ init_hsa_context (void)
     = GOMP_PLUGIN_malloc_cleared (hsa_context.agent_count
 				  * sizeof (struct agent_info));
   status = hsa_fns.hsa_iterate_agents_fn (assign_agent_ids, &agent_index);
+  if (status != HSA_STATUS_SUCCESS)
+    return hsa_error ("Scanning compute agents failed", status);
   if (agent_index != hsa_context.agent_count)
     {
       GOMP_PLUGIN_error ("Failed to assign IDs to all GCN agents");
@@ -3473,6 +3475,9 @@ GOMP_OFFLOAD_init_device (int n)
   status = hsa_fns.hsa_agent_iterate_regions_fn (agent->id,
 						 get_kernarg_memory_region,
 						 &agent->kernarg_region);
+  if (status != HSA_STATUS_SUCCESS
+      && status != HSA_STATUS_INFO_BREAK)
+    hsa_error ("Scanning memory regions failed", status);
   if (agent->kernarg_region.handle == (uint64_t) -1)
     {
       GOMP_PLUGIN_error ("Could not find suitable memory region for kernel "
@@ -3486,6 +3491,9 @@ GOMP_OFFLOAD_init_device (int n)
   status = hsa_fns.hsa_agent_iterate_regions_fn (agent->id,
 						 get_data_memory_region,
 						 &agent->data_region);
+  if (status != HSA_STATUS_SUCCESS
+      && status != HSA_STATUS_INFO_BREAK)
+    hsa_error ("Scanning memory regions failed", status);
   if (agent->data_region.handle == (uint64_t) -1)
     {
       GOMP_PLUGIN_error ("Could not find suitable memory region for device "