From: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Date: Wed, 13 Jun 2018 06:35:17 +0000 (+0530)
Subject: net: emaclite: Fix MDIO bus unregister bug
X-Git-Tag: v5.4.17~5787^2~11^2~2
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=27cad008406600822ab638980412ceea740e7fc8;p=arm%2Flinux.git

net: emaclite: Fix MDIO bus unregister bug

Since 'has_mdio' flag is not used,sequence insmod->rmmod-> insmod
leads to failure as MDIO unregister doesn't happen in .remove().
Fix it by checking MII bus pointer instead.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
index 37989ce543ba..06eb6c886388 100644
--- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -1191,7 +1191,7 @@ static int xemaclite_of_remove(struct platform_device *of_dev)
 	struct net_local *lp = netdev_priv(ndev);
 
 	/* Un-register the mii_bus, if configured */
-	if (lp->has_mdio) {
+	if (lp->mii_bus) {
 		mdiobus_unregister(lp->mii_bus);
 		mdiobus_free(lp->mii_bus);
 		lp->mii_bus = NULL;