Return the actual error code if call kset_create_and_add() failed
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 #ifdef CONFIG_SYSFS
        net->queues_kset = kset_create_and_add("queues",
            NULL, &net->dev.kobj);
-       if (!net->queues_kset)
-               return -ENOMEM;
+       if (IS_ERR(net->queues_kset))
+               return PTR_ERR(net->queues_kset);
        real_rx = net->real_num_rx_queues;
 #endif
        real_tx = net->real_num_tx_queues;