netdev - [PATCH net-next 7/8] s390/qeth: remove unused fallback in Layer3's MAC code

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Date:   Thu,  8 Nov 2018 15:06:21 +0100
From:   Julian Wiedmann <jwi@...ux.ibm.com>
To:     David Miller <davem@...emloft.net>
Cc:     <netdev@...r.kernel.org>, <linux-s390@...r.kernel.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Stefan Raspl <raspl@...ux.ibm.com>,
        Ursula Braun <ubraun@...ux.ibm.com>,
        Julian Wiedmann <jwi@...ux.ibm.com>
Subject: [PATCH net-next 7/8] s390/qeth: remove unused fallback in Layer3's MAC code

If the CREATE ADDR sent by qeth_l3_iqd_read_initial_mac() fails, its
callback sets a random MAC address on the net_device. The error then
propagates back, and qeth_l3_setup_netdev() bails out without
registering the net_device.

Any subsequent call to qeth_l3_setup_netdev() will then attempt a fresh
CREATE ADDR which either 1) also fails, or 2) sets a proper MAC address
on the net_device. Consequently, the net_device will never be registered
with a random MAC and we can drop the fallback code.

Signed-off-by: Julian Wiedmann <jwi@...ux.ibm.com>
---
 drivers/s390/net/qeth_l3_main.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 89d5e6fb21ac..674ff3344ff3 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -949,9 +949,6 @@ static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 	if (cmd->hdr.return_code == 0)
 		ether_addr_copy(card->dev->dev_addr,
 				cmd->data.create_destroy_addr.unique_id);
-	else
-		eth_random_addr(card->dev->dev_addr);
-
 	return 0;
 }

-- 
2.16.4