[ti:ti-linux-6.1.y-wip 6/10] drivers/net/ethernet/ti/cpsw-proxy-client.c:436:13: warning: variable 'response_status' set but not used

[kernel test robot <lkp@intel.com>]

tree:   git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-linux-6.1.y-wip
head:   da9bbd5b8e9256096f5e068401df1bd53cc2e897
commit: 9343810f28a1291f0276af43af820220abae9dcd [6/10] net: ethernet: ti: Add CPSW Proxy Client driver
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20231119/202311192041.0XB36bvR-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231119/202311192041.0XB36bvR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311192041.0XB36bvR-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/ti/cpsw-proxy-client.c: In function 'cpsw_proxy_client_cb':
>> drivers/net/ethernet/ti/cpsw-proxy-client.c:436:13: warning: variable 'response_status' set but not used [-Wunused-but-set-variable]
     436 |         int response_status, ret = 0;
         |             ^~~~~~~~~~~~~~~


vim +/response_status +436 drivers/net/ethernet/ti/cpsw-proxy-client.c

   424	
   425	static int cpsw_proxy_client_cb(struct rpmsg_device *rpdev, void *data,
   426					int len, void *priv, u32 src)
   427	{
   428		struct cpsw_proxy_common *common = dev_get_drvdata(&rpdev->dev);
   429		struct response_message_header *response_msg_hdr;
   430		struct notify_message_header *notify_msg_hdr;
   431		struct message *msg = (struct message *)data;
   432		struct task_struct *server_notify_handler;
   433		u32 msg_type = msg->msg_hdr.msg_type;
   434		u32 notify_type, response_id, token;
   435		struct cpsw_virt_port *virt_port;
 > 436		int response_status, ret = 0;
   437	
   438		switch (msg_type) {
   439		case ETHREMOTECFG_MSG_NOTIFY:
   440			notify_msg_hdr = (struct notify_message_header *)msg;
   441			notify_type = notify_msg_hdr->notify_type;
   442			token = notify_msg_hdr->msg_hdr.token;
   443	
   444			switch (notify_type) {
   445			case ETHREMOTECFG_NOTIFYTYPE_HWERROR:
   446				common->in_recovery = 1;
   447				virt_port = get_virt_port_from_token(common, token);
   448				if (!virt_port) {
   449					dev_err(common->dev, "invalid notification received\n");
   450					return -EINVAL;
   451				}
   452	
   453				server_notify_handler =
   454						kthread_run(&cpsw_proxy_client_server_error_notify_handler,
   455							    virt_port, "hwerr_handler");
   456	
   457				if (IS_ERR(server_notify_handler))
   458					ret = PTR_ERR(server_notify_handler);
   459				break;
   460	
   461			case ETHREMOTECFG_NOTIFYTYPE_HWRECOVERY_COMPLETE:
   462				common->error_handled = 0;
   463				virt_port = get_virt_port_from_token(common, token);
   464				if (!virt_port) {
   465					dev_err(common->dev, "invalid notification received\n");
   466					return -EINVAL;
   467				}
   468	
   469				server_notify_handler =
   470					kthread_run(&cpsw_proxy_client_server_recovery_notify_handler,
   471						    virt_port, "recovery_handler");
   472	
   473				if (IS_ERR(server_notify_handler))
   474					ret = PTR_ERR(server_notify_handler);
   475				break;
   476	
   477			default:
   478				break;
   479			}
   480	
   481			break;
   482	
   483		case ETHREMOTECFG_MSG_RESPONSE:
   484			response_msg_hdr = (struct response_message_header *)msg;
   485			response_id = response_msg_hdr->response_id;
   486			response_status = response_msg_hdr->response_status;
   487	
   488			if (response_id == common->request_id - 1) {
   489				dev_info(common->dev, "ignoring delayed response for request: %u\n",
   490					 response_id);
   491				return 0;
   492			}
   493	
   494			if (response_id != common->request_id) {
   495				dev_err(common->dev, "expected response id: %u but received %u\n",
   496					common->request_id, response_id);
   497				return -EINVAL;
   498			}
   499	
   500			memcpy(&common->recv_msg, msg, len);
   501			common->recv_msg_len = len;
   502			complete(&common->wait_for_response);
   503			break;
   504	
   505		default:
   506			dev_err(common->dev, "invalid message received\n");
   507			return -EOPNOTSUPP;
   508		}
   509	
   510		return ret;
   511	}
   512	

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