netdev - [PATCH net-next v3 06/19] net: axienet: fix teardown order of MDIO bus

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Message-Id: <1559684626-24775-7-git-send-email-hancock@sedsystems.ca>
Date:   Tue,  4 Jun 2019 15:43:33 -0600
From:   Robert Hancock <hancock@...systems.ca>
To:     netdev@...r.kernel.org
Cc:     anirudh@...inx.com, John.Linn@...inx.com, andrew@...n.ch,
        Robert Hancock <hancock@...systems.ca>
Subject: [PATCH net-next v3 06/19] net: axienet: fix teardown order of MDIO bus

Since the MDIO is is brought up before the netdev is registered, it
should be torn down after the netdev is removed. Otherwise, PHY accesses
can potentially access freed MDIO bus references and cause a crash.

Signed-off-by: Robert Hancock <hancock@...systems.ca>
---
 drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 42b343c..5cb39de 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -1651,8 +1651,8 @@ static int axienet_remove(struct platform_device *pdev)
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct axienet_local *lp = netdev_priv(ndev);
 
-	axienet_mdio_teardown(lp);
 	unregister_netdev(ndev);
+	axienet_mdio_teardown(lp);
 
 	if (lp->clk)
 		clk_disable_unprepare(lp->clk);
-- 
1.8.3.1