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Diffstat (limited to 'drivers/net/phy/mdio-bcm-unimac.c')
-rw-r--r--drivers/net/phy/mdio-bcm-unimac.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/phy/mdio-bcm-unimac.c b/drivers/net/phy/mdio-bcm-unimac.c
index 414fdf1f343f..fc7abc50b4f1 100644
--- a/drivers/net/phy/mdio-bcm-unimac.c
+++ b/drivers/net/phy/mdio-bcm-unimac.c
@@ -81,7 +81,13 @@ static int unimac_mdio_read(struct mii_bus *bus, int phy_id, int reg)
return -ETIMEDOUT;
cmd = __raw_readl(priv->base + MDIO_CMD);
- if (cmd & MDIO_READ_FAIL)
+
+ /* Some broken devices are known not to release the line during
+ * turn-around, e.g: Broadcom BCM53125 external switches, so check for
+ * that condition here and ignore the MDIO controller read failure
+ * indication.
+ */
+ if (!(bus->phy_ignore_ta_mask & 1 << phy_id) && (cmd & MDIO_READ_FAIL))
return -EIO;
return cmd & 0xffff;