net/fsl: Make xgmac_mdio read error message useful

Print the device address, the register number and the PHY ID for
which the MDIO read operation failed

Signed-off-by: Shruti Kanetkar <Shruti@Freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/ethernet/freescale/xgmac_mdio.c b/drivers/net/ethernet/freescale/xgmac_mdio.c
index d449fcb90199..0c9d55c862ae 100644
--- a/drivers/net/ethernet/freescale/xgmac_mdio.c
+++ b/drivers/net/ethernet/freescale/xgmac_mdio.c
@@ -162,7 +162,9 @@ static int xgmac_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
 
         /* Return all Fs if nothing was there */
         if (in_be32(&regs->mdio_stat) & MDIO_STAT_RD_ER) {
-                dev_err(&bus->dev, "MDIO read error\n");
+                dev_err(&bus->dev,
+                        "Error while reading PHY%d reg at %d.%d\n",
+                        phy_id, dev_addr, regnum);
                 return 0xffff;
         }