bonding: convert all_slaves_active to use the new option API

This patch adds the necessary changes so all_slaves_active would use
the new bonding option API.

Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_sysfs.c

@@ -1015,22 +1015,13 @@ static ssize_t bonding_store_slaves_active(struct device *d,
 					   const char *buf, size_t count)
 {
 	struct bonding *bond = to_bond(d);
-	int new_value, ret;
+	int ret;
 
-	if (sscanf(buf, "%d", &new_value) != 1) {
-		pr_err("%s: no all_slaves_active value specified.\n",
-		       bond->dev->name);
-		return -EINVAL;
-	}
-
-	if (!rtnl_trylock())
-		return restart_syscall();
-
-	ret = bond_option_all_slaves_active_set(bond, new_value);
+	ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ALL_SLAVES_ACTIVE,
+				   (char *)buf);
 	if (!ret)
 		ret = count;
 
-	rtnl_unlock();
 	return ret;
 }
 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,