rndis_wlan: fix broken logic in add_wep_key()

add_wep_key() tries to check if key length is not 5 AND not 13
but uses (key_len != 5 || key_len != 13) instead. Fix this.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rndis_wlan.c

@@ -1214,7 +1214,7 @@ static int add_wep_key(struct usbnet *usbdev, char *key, int key_len, int index)
 	struct ndis_80211_wep_key ndis_key;
 	int cipher, ret;
 
-	if ((key_len != 5 || key_len != 13) || index < 0 || index > 3)
+	if ((key_len != 5 && key_len != 13) || index < 0 || index > 3)
 		return -EINVAL;
 
 	if (key_len == 5)