From 0f50c10d2683fd2b8a3908c779c5f29bcb3c2174 Mon Sep 17 00:00:00 2001 From: Liviu Dudau Date: Mon, 28 Sep 2015 17:51:51 +0100 Subject: [PATCH] RESEND: [PATCH v3 net-next] sky2: use random address if EEPROM is bad On some embedded systems the EEPROM does not contain a valid MAC address. In that case it is better to fallback to a generated mac address and let init scripts fix the value later. Reported-by: Liviu Dudau Signed-off-by: Stephen Hemminger [Changed handcoded setup to use eth_hw_addr_random() and to save new address into HW] Signed-off-by: Liviu Dudau Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/sky2.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c index d9f4498832a1..5606a043063e 100644 --- a/drivers/net/ethernet/marvell/sky2.c +++ b/drivers/net/ethernet/marvell/sky2.c @@ -4819,6 +4819,18 @@ static struct net_device *sky2_init_netdev(struct sky2_hw *hw, unsigned port, memcpy_fromio(dev->dev_addr, hw->regs + B2_MAC_1 + port * 8, ETH_ALEN); + /* if the address is invalid, use a random value */ + if (!is_valid_ether_addr(dev->dev_addr)) { + struct sockaddr sa = { AF_UNSPEC }; + + netdev_warn(dev, + "Invalid MAC address, defaulting to random\n"); + eth_hw_addr_random(dev); + memcpy(sa.sa_data, dev->dev_addr, ETH_ALEN); + if (sky2_set_mac_address(dev, &sa)) + netdev_warn(dev, "Failed to set MAC address.\n"); + } + return dev; }