net/kni: warn on stop failure

[ upstream commit b752fb4 ]

Return value of function 'eth_kni_dev_stop' passed to 'ret' is
rewritten later, and this is unreasonable.

This patch fixes it.

Fixes: 62024eb ("ethdev: change stop operation callback to return int")

Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

drivers/net/kni/rte_eth_kni.c

@@ -211,6 +211,9 @@ eth_kni_close(struct rte_eth_dev *eth_dev)
 		return 0;
 
 	ret = eth_kni_dev_stop(eth_dev);
+	if (ret)
+		PMD_LOG(WARNING, "Not able to stop kni for %s",
+			eth_dev->data->name);
 
 	/* mac_addrs must not be freed alone because part of dev_private */
 	eth_dev->data->mac_addrs = NULL;