drm/amdgpu: add common sdma_ras_fini function

sdma_ras_fini can be shared among all generations of sdma

Signed-off-by: Tao Zhou <[e-mail]>
Reviewed-by: Guchun Chen <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	return r;
 }
 
+void amdgpu_sdma_ras_fini(struct amdgpu_device *adev)
+{
+	if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__SDMA) &&
+			adev->sdma.ras_if) {
+		struct ras_common_if *ras_if = adev->sdma.ras_if;
+		struct ras_ih_if ih_info = {
+			.head = *ras_if,
+			/* the cb member will not be used by
+			 * amdgpu_ras_interrupt_remove_handler, init it only
+			 * to cheat the check in ras_late_fini
+			 */
+			.cb = amdgpu_sdma_process_ras_data_cb,
+		};
+
+		amdgpu_ras_late_fini(adev, ras_if, &ih_info);
+		kfree(ras_if);
+	}
+}
+
 int amdgpu_sdma_process_ras_data_cb(struct amdgpu_device *adev,
 		void *err_data,
 		struct amdgpu_iv_entry *entry)

drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h

···
 uint64_t amdgpu_sdma_get_csa_mc_addr(struct amdgpu_ring *ring, unsigned vmid);
 int amdgpu_sdma_ras_late_init(struct amdgpu_device *adev,
 			      void *ras_ih_info);
+void amdgpu_sdma_ras_fini(struct amdgpu_device *adev);
 int amdgpu_sdma_process_ras_data_cb(struct amdgpu_device *adev,
 		void *err_data,
 		struct amdgpu_iv_entry *entry);

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

···
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	int i;
 
-	if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__SDMA) &&
-			adev->sdma.ras_if) {
-		struct ras_common_if *ras_if = adev->sdma.ras_if;
-		struct ras_ih_if ih_info = {
-			.head = *ras_if,
-		};
-
-		/*remove fs first*/
-		amdgpu_ras_debugfs_remove(adev, ras_if);
-		amdgpu_ras_sysfs_remove(adev, ras_if);
-		/*remove the IH*/
-		amdgpu_ras_interrupt_remove_handler(adev, &ih_info);
-		amdgpu_ras_feature_enable(adev, ras_if, 0);
-		kfree(ras_if);
-	}
+	amdgpu_sdma_ras_fini(adev);
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		amdgpu_ring_fini(&adev->sdma.instance[i].ring);