From: Russell King Date: Mon, 7 Jul 2014 23:22:59 +0000 (+0100) Subject: net: fec: ensure that a disconnected phy isn't configured X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0b146ca8d467c1dc6ad50628089d183608a47e40;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git net: fec: ensure that a disconnected phy isn't configured When we disconnect from a phy, we should forget our pointer to it so we don't accidentally try to configure it. We handle a NULL phy pointer correctly in most places, except fec_enet_set_pauseparam(). Fix this too. Acked-by: Fugang Duan Signed-off-by: Russell King Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 6a03d7eced4d..cf805468eecc 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -1875,6 +1875,9 @@ static int fec_enet_set_pauseparam(struct net_device *ndev, { struct fec_enet_private *fep = netdev_priv(ndev); + if (!fep->phy_dev) + return -ENODEV; + if (pause->tx_pause != pause->rx_pause) { netdev_info(ndev, "hardware only support enable/disable both tx and rx"); @@ -2186,6 +2189,7 @@ fec_enet_close(struct net_device *ndev) phy_stop(fep->phy_dev); phy_disconnect(fep->phy_dev); + fep->phy_dev = NULL; fec_enet_clk_enable(ndev, false); pinctrl_pm_select_sleep_state(&fep->pdev->dev);