uwb: Replace mac address parsing

Replace sscanf() with mac_pton().

Signed-off-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/uwb/Kconfig

···
 menuconfig UWB
 	tristate "Ultra Wideband devices"
 	default n
+	select GENERIC_NET_UTILS
 	help
 	  UWB is a high-bandwidth, low-power, point-to-point radio
 	  technology using a wide spectrum (3.1-10.6GHz). It is

drivers/uwb/address.c

···
 	struct uwb_mac_addr addr;
 	ssize_t result;
 
-	result = sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx\n",
-			&addr.data[0], &addr.data[1], &addr.data[2],
-			&addr.data[3], &addr.data[4], &addr.data[5]);
-	if (result != 6) {
-		result = -EINVAL;
-		goto out;
-	}
+	if (!mac_pton(buf, addr.data))
+		return -EINVAL;
 	if (is_multicast_ether_addr(addr.data)) {
 		dev_err(&rc->uwb_dev.dev, "refusing to set multicast "
 			"MAC address %s\n", buf);
-		result = -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
 	result = uwb_rc_mac_addr_set(rc, &addr);
 	if (result == 0)
 		rc->uwb_dev.mac_addr = addr;
-out:
+
 	return result < 0 ? result : size;
 }
 DEVICE_ATTR(mac_address, S_IRUGO | S_IWUSR, uwb_rc_mac_addr_show, uwb_rc_mac_addr_store);