[PATCH 2/2] drm/amdgpu: No longer insert ras blocks into ras_list if it already exists in ras_list

[yipechai]

No longer insert ras blocks into ras_list if it already exists in ras_list.

Signed-off-by: yipechai <YiPeng.Chai at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 62be0b4909b3..e6d3bb4b56e4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -2754,9 +2754,17 @@ int amdgpu_ras_reset_gpu(struct amdgpu_device *adev)
 int amdgpu_ras_register_ras_block(struct amdgpu_device *adev,
 		struct amdgpu_ras_block_object* ras_block_obj)
 {
+	struct amdgpu_ras_block_object *obj, *tmp;
 	if (!adev || !amdgpu_ras_asic_supported(adev) || !ras_block_obj)
 		return -EINVAL;
 
+	/* If the ras object had been in ras_list, doesn't add it to ras_list again */
+	list_for_each_entry_safe(obj, tmp, &adev->ras_list, node) {
+		if (obj == ras_block_obj) {
+			return 0;
+		}
+	}
+
 	INIT_LIST_HEAD(&ras_block_obj->node);
 	list_add_tail(&ras_block_obj->node, &adev->ras_list);
 
-- 
2.25.1