drm/amdgpu: skip umc ras irq handling in poison mode (v2)

In ras poison mode, umc uncorrectable error will be ignored until
the corrupted data consumed by another ras module (such as gfx, sdma).

v2: update the debug message and replace dev_warn with dev_info.
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

@@ -1544,10 +1544,15 @@ static void amdgpu_ras_interrupt_handler(struct ras_manager *obj)
 		data->rptr = (data->aligned_element_size +
 				data->rptr) % data->ring_size;
 
+		if (data->cb) {
+			if (amdgpu_ras_is_poison_mode_supported(obj->adev) &&
+			    obj->head.block == AMDGPU_RAS_BLOCK__UMC)
+				dev_info(obj->adev->dev,
+						"Poison is created, no user action is needed.\n");
+			else {
 				/* Let IP handle its data, maybe we need get the output
 				 * from the callback to udpate the error type/count, etc
 				 */
-		if (data->cb) {
 				ret = data->cb(obj->adev, &err_data, &entry);
 				/* ue will trigger an interrupt, and in that case
 				 * we need do a reset to recovery the whole system.
@@ -1563,6 +1568,7 @@ static void amdgpu_ras_interrupt_handler(struct ras_manager *obj)
 				}
 			}
 		}
+	}
 }
 
 static void amdgpu_ras_interrupt_process_handler(struct work_struct *work)