diff options
Diffstat (limited to 'drivers/net/ethernet/smsc/smsc911x.c')
| -rw-r--r-- | drivers/net/ethernet/smsc/smsc911x.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c index f539813878f5..3ebd0664c697 100644 --- a/drivers/net/ethernet/smsc/smsc911x.c +++ b/drivers/net/ethernet/smsc/smsc911x.c @@ -43,7 +43,6 @@ #include <linux/smsc911x.h> #include <linux/device.h> #include <linux/of.h> -#include <linux/of_gpio.h> #include <linux/of_net.h> #include <linux/acpi.h> #include <linux/pm_runtime.h> @@ -2163,10 +2162,20 @@ static const struct net_device_ops smsc911x_netdev_ops = { static void smsc911x_read_mac_address(struct net_device *dev) { struct smsc911x_data *pdata = netdev_priv(dev); - u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH); - u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL); + u32 mac_high16, mac_low32; u8 addr[ETH_ALEN]; + mac_high16 = smsc911x_mac_read(pdata, ADDRH); + mac_low32 = smsc911x_mac_read(pdata, ADDRL); + + /* The first mac_read in some setups can incorrectly read 0. Re-read it + * to get the full MAC if this is observed. + */ + if (mac_high16 == 0) { + SMSC_TRACE(pdata, probe, "Re-read MAC ADDRH\n"); + mac_high16 = smsc911x_mac_read(pdata, ADDRH); + } + addr[0] = (u8)(mac_low32); addr[1] = (u8)(mac_low32 >> 8); addr[2] = (u8)(mac_low32 >> 16); @@ -2351,7 +2360,7 @@ static void smsc911x_drv_remove(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); } -/* standard register acces */ +/* standard register access */ static const struct smsc911x_ops standard_smsc911x_ops = { .reg_read = __smsc911x_reg_read, .reg_write = __smsc911x_reg_write, |