diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index 89490cc451ac..caebb97289ea 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -87,6 +87,10 @@ static int packetsize = 2560; module_param(packetsize, int, 0644); MODULE_PARM_DESC(packetsize, "Override the RX URB packet size"); +static char *macaddr = ":"; +module_param(macaddr, charp, 0); +MODULE_PARM_DESC(macaddr, "MAC address"); + static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data) { @@ -807,6 +811,52 @@ static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) return phy_mii_ioctl(netdev->phydev, rq, cmd); } +/* Check the macaddr module parameter for a MAC address */ +static int smsc95xx_is_macaddr_param(struct usbnet *dev, struct net_device *nd) +{ + int i, j, got_num, num; + u8 mtbl[ETH_ALEN]; + + if (macaddr[0] == ':') + return 0; + + i = 0; + j = 0; + num = 0; + got_num = 0; + while (j < ETH_ALEN) { + if (macaddr[i] && macaddr[i] != ':') { + got_num++; + if ('0' <= macaddr[i] && macaddr[i] <= '9') + num = num * 16 + macaddr[i] - '0'; + else if ('A' <= macaddr[i] && macaddr[i] <= 'F') + num = num * 16 + 10 + macaddr[i] - 'A'; + else if ('a' <= macaddr[i] && macaddr[i] <= 'f') + num = num * 16 + 10 + macaddr[i] - 'a'; + else + break; + i++; + } else if (got_num == 2) { + mtbl[j++] = (u8) num; + num = 0; + got_num = 0; + i++; + } else { + break; + } + } + + if (j == ETH_ALEN) { + netif_dbg(dev, ifup, dev->net, "Overriding MAC address with: " + "%02x:%02x:%02x:%02x:%02x:%02x\n", mtbl[0], mtbl[1], mtbl[2], + mtbl[3], mtbl[4], mtbl[5]); + dev_addr_mod(nd, 0, mtbl, ETH_ALEN); + return 1; + } else { + return 0; + } +} + static void smsc95xx_init_mac_address(struct usbnet *dev) { u8 addr[ETH_ALEN]; @@ -830,6 +880,10 @@ static void smsc95xx_init_mac_address(struct usbnet *dev) } } + /* Check module parameters */ + if (smsc95xx_is_macaddr_param(dev, dev->net)) + return; + /* no useful static MAC address found. generate a random one */ eth_hw_addr_random(dev->net); netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");