From: Michael Walle Date: Mon, 28 Mar 2022 22:03:50 +0000 (+0200) Subject: net: lan966x: fix kernel oops on ioctl when I/F is down X-Git-Tag: v6.1-rc5~1659^2~14 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ad7da1ce5749c0eb4f09dd7e5510123be56f10fb;p=platform%2Fkernel%2Flinux-starfive.git net: lan966x: fix kernel oops on ioctl when I/F is down ioctls handled by phy_mii_ioctl() will cause a kernel oops when the interface is down. Fix it by making sure there is a PHY attached. Fixes: 735fec995b21 ("net: lan966x: Implement SIOCSHWTSTAMP and SIOCGHWTSTAMP") Signed-off-by: Michael Walle Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/20220328220350.3118969-1-michael@walle.cc Signed-off-by: Paolo Abeni --- diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c index e1bcb28..1f8c67f 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c @@ -408,6 +408,9 @@ static int lan966x_port_ioctl(struct net_device *dev, struct ifreq *ifr, } } + if (!dev->phydev) + return -ENODEV; + return phy_mii_ioctl(dev->phydev, ifr, cmd); }