[Intel-wired-lan] [PATCH] igb: Add MII write support

[jackie . jone]

From: Jackie Jone <jackie.j...@alliedtelesis.co.nz>

To facilitate running PHY parametric tests, add support for the SIOCSMIIREG
ioctl. This allows a userspace application to write to the PHY registers
to enable the test modes.

Signed-off-by: Jackie Jone <jackie.j...@alliedtelesis.co.nz>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c 
b/drivers/net/ethernet/intel/igb/igb_main.c
index 03a4da6a1447..7fbfcf01fbf9 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -8977,6 +8977,10 @@ static int igb_mii_ioctl(struct net_device *netdev, 
struct ifreq *ifr, int cmd)
                        return -EIO;
                break;
        case SIOCSMIIREG:
+               if (igb_write_phy_reg(&adapter->hw, data->reg_num & 0x1F,
+                                    data->val_in))
+                       return -EIO;
+               break;
        default:
                return -EOPNOTSUPP;
        }