From 857d8ee2608831197d9838c8331b87848d05da33 Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Wed, 18 Oct 2017 17:40:19 +0200 Subject: [PATCH] s390/qeth: don't verify device when setting MAC address There's no reason why l2_set_mac_address() should ever be called for a netdevice that's not owned by qeth. It's certainly not required for VLAN devices, which have their own netdev_ops. Also: 1) we don't do such validation for any of the other netdev_ops routines. 2) the code in question clearly has never been actually exercised; it's broken. After determining that the device is not owned by qeth, it would still use dev->ml_priv to write a qeth trace entry. Remove the check, and its helper that walked the global card list. Signed-off-by: Julian Wiedmann Signed-off-by: David S. Miller --- drivers/s390/net/qeth_l2_main.c | 23 ----------------------- 1 file changed, 23 deletions(-) diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 7b61c2ef4c74..87aa8c2ab5b0 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -38,24 +38,6 @@ static void qeth_l2_vnicc_init(struct qeth_card *card); static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc, u32 *timeout); -static int qeth_l2_verify_dev(struct net_device *dev) -{ - struct qeth_card *card; - unsigned long flags; - int rc = 0; - - read_lock_irqsave(&qeth_core_card_list.rwlock, flags); - list_for_each_entry(card, &qeth_core_card_list.list, list) { - if (card->dev == dev) { - rc = QETH_REAL_CARD; - break; - } - } - read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags); - - return rc; -} - static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no) { struct qeth_card *card; @@ -568,11 +550,6 @@ static int qeth_l2_set_mac_address(struct net_device *dev, void *p) QETH_CARD_TEXT(card, 3, "setmac"); - if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) { - QETH_CARD_TEXT(card, 3, "setmcINV"); - return -EOPNOTSUPP; - } - if (card->info.type == QETH_CARD_TYPE_OSN || card->info.type == QETH_CARD_TYPE_OSM || card->info.type == QETH_CARD_TYPE_OSX) { -- 2.45.2