From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Date: Sat, 30 Apr 2016 22:47:36 +0000 (+0300)
Subject: macb: fix mdiobus_scan() error check
X-Git-Url: http://git.efficios.com/?p=deliverable%2Flinux.git;a=commitdiff_plain;h=ce24c2b8a904753701fe4df313b4cbc2b0649e3e

macb: fix mdiobus_scan() error check

Now mdiobus_scan() returns ERR_PTR(-ENODEV) instead of NULL if the PHY
device ID was read as all ones. As this was not  an error before, this
value  should be filtered out now in this driver.

Fixes: b74766a0a0fe ("phylib: don't return NULL from get_phy_device()")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index 48a7d7dee846..898f06f9e286 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -458,7 +458,8 @@ static int macb_mii_init(struct macb *bp)
 				struct phy_device *phydev;
 
 				phydev = mdiobus_scan(bp->mii_bus, i);
-				if (IS_ERR(phydev)) {
+				if (IS_ERR(phydev) &&
+				    PTR_ERR(phydev) != -ENODEV) {
 					err = PTR_ERR(phydev);
 					break;
 				}