Re: [PATCH net 07/10] net: ethoc: move setting of netops to fix crash

[Maxime Chevallier <maxime.chevallier@bootlin.com>]

On 10/8/26 04:26, David Yang wrote:
> ethoc_probe() calls ethoc_mdio_probe(), which connects the PHY,
> before netdev->netdev_ops is assigned. phy_attach_direct() ->
> phy_link_topo_add_phy() reads dev->netdev_ops through
> netdev_need_ops_lock() since the commit in question, so probing crashes
> with a NULL pointer dereference when CONFIG_NET_SHAPER is enabled.
> 
> Assign netdev_ops before the PHY attach, as was done for emac in commit
> 7c9f391ec89c ("net: emac: move setting of netops to fix crash").
> 
> Fixes: ded86da4bbb7 ("net: ethtool: relax ethnl_req_get_phydev() locking assertion")
> Signed-off-by: David Yang <mmyangfl@gmail.com>

Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>

Thanks,

Maxime

> ---
>  drivers/net/ethernet/ethoc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
> index 0c418557264c..e5b7df43e8f6 100644
> --- a/drivers/net/ethernet/ethoc.c
> +++ b/drivers/net/ethernet/ethoc.c
> @@ -1211,6 +1211,8 @@ static int ethoc_probe(struct platform_device *pdev)
>  		goto free3;
>  	}
>  
> +	netdev->netdev_ops = &ethoc_netdev_ops;
> +
>  	ret = ethoc_mdio_probe(netdev);
>  	if (ret) {
>  		dev_err(&netdev->dev, "failed to probe MDIO bus\n");
> @@ -1218,7 +1220,6 @@ static int ethoc_probe(struct platform_device *pdev)
>  	}
>  
>  	/* setup the net_device structure */
> -	netdev->netdev_ops = &ethoc_netdev_ops;
>  	netdev->watchdog_timeo = ETHOC_TIMEOUT;
>  	netdev->features |= 0;
>  	netdev->ethtool_ops = &ethoc_ethtool_ops;