[PATCH 1/2] drm/amdgpu: Only create err_count sysfs when hw_op is supported

[Hawking Zhang]

Some IP blocks only support partial ras feature and don't
have ras counter and/or ras error status register at all.
Driver should not create err_count sysfs node for those
IP blocks.

Signed-off-by: Hawking Zhang <hawking.zh...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 31 ++++++++++++++-----------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index a6c3265cdbc4..dd7cdc234d7e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -2757,23 +2757,28 @@ int amdgpu_ras_block_late_init(struct amdgpu_device 
*adev,
                        goto cleanup;
        }
 
-       r = amdgpu_ras_sysfs_create(adev, ras_block);
-       if (r)
-               goto interrupt;
+       if (ras_obj->hw_ops &&
+           (ras_obj->hw_ops->query_ras_error_count ||
+            ras_obj->hw_ops->query_ras_error_status)) {
+               r = amdgpu_ras_sysfs_create(adev, ras_block);
+               if (r)
+                       goto interrupt;
 
-       /* Those are the cached values at init.
-        */
-       query_info = kzalloc(sizeof(struct ras_query_if), GFP_KERNEL);
-       if (!query_info)
-               return -ENOMEM;
-       memcpy(&query_info->head, ras_block, sizeof(struct ras_common_if));
+               /* Those are the cached values at init.
+                */
+               query_info = kzalloc(sizeof(struct ras_query_if), GFP_KERNEL);
+               if (!query_info)
+                       return -ENOMEM;
+               memcpy(&query_info->head, ras_block, sizeof(struct 
ras_common_if));
 
-       if (amdgpu_ras_query_error_count(adev, &ce_count, &ue_count, 
query_info) == 0) {
-               atomic_set(&con->ras_ce_count, ce_count);
-               atomic_set(&con->ras_ue_count, ue_count);
+               if (amdgpu_ras_query_error_count(adev, &ce_count, &ue_count, 
query_info) == 0) {
+                       atomic_set(&con->ras_ce_count, ce_count);
+                       atomic_set(&con->ras_ue_count, ue_count);
+               }
+
+               kfree(query_info);
        }
 
-       kfree(query_info);
        return 0;
 
 interrupt:
-- 
2.17.1