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net: macb: NULL out phydev after removing mdio bus

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To ensure the dev->phydev pointer is not used after becoming invalid in
mdiobus_unregister, set it to NULL. This happens when removing the macb
driver without first taking its interface down, since unregister_netdev
will end up calling macb_close.

Signed-off-by: Xander Huff <xander.huff@ni.com>
Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com>
Signed-off-by: Brad Mouring <brad.mouring@ni.com>
Reviewed-by: Moritz Fischer <moritz.fischer@ettus.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nathan Sullivan 2016-10-07 10:13:22 -05:00 committed by David S. Miller
parent 912e27e85e
commit fa6114d4bd
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/cadence/macb.c
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@ -3117,6 +3117,7 @@ static int macb_remove(struct platform_device *pdev)
if (dev->phydev)
phy_disconnect(dev->phydev);
mdiobus_unregister(bp->mii_bus);
dev->phydev = NULL;
mdiobus_free(bp->mii_bus);
/* Shutdown the PHY if there is a GPIO reset */