On Thu, 29 Oct 2020 03:28:45 +0300 Sergej Bauer wrote: > This is just a minor fix which prevents a kernel NULL pointer > dereference when using phy-less lan743x. > > Signed-off-by: Sergej Bauer <sba...@blackbox.su>
I take you mean when the device is down netdev->phydev will be NULL? > diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c > b/drivers/net/ethernet/microchip/lan743x_ethtool.c > index dcde496da7fb..354d72d550f2 100644 > --- a/drivers/net/ethernet/microchip/lan743x_ethtool.c > +++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c > @@ -793,6 +795,9 @@ static int lan743x_ethtool_set_wol(struct net_device > *netdev, > { > struct lan743x_adapter *adapter = netdev_priv(netdev); > > + if (!netdev->phydev) > + return -EIO; Does it make sense to just skip the phy_ethtool_set_wol() call instead? Also doesn't the wol configuration of the PHY get lost across an netdev up/down cycle in this driver? Should it be re-applied after phy is connected back? > adapter->wolopts = 0; > if (wol->wolopts & WAKE_UCAST) > adapter->wolopts |= WAKE_UCAST;