It returns 0 in case of success, !0 error otherwise. Fix the improper error
verification.
Fixes: 2c9839c143bbc ("bonding: add num_grat_arp attribute netlink support")
CC: sfeldma@cumulusnetworks.com
CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Acked-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
        int ret;
 
        ret = kstrtou8(buf, 10, &new_value);
-       if (!ret) {
+       if (ret) {
                pr_err("%s: invalid value %s specified.\n",
                       bond->dev->name, buf);
                return ret;