netdev - Re: [PATCH net 2/3] net: lan743x: support WOL in MAC even when PHY does not

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Message-ID: <20240226082840.qbofj764s35zo352@DEN-DL-M31836.microchip.com>
Date: Mon, 26 Feb 2024 09:28:40 +0100
From: Horatiu Vultur <horatiu.vultur@...rochip.com>
To: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
CC: <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>,
	<linux-kernel@...r.kernel.org>, <bryan.whitehead@...rochip.com>,
	<richardcochran@...il.com>, <UNGLinuxDriver@...rochip.com>
Subject: Re: [PATCH net 2/3] net: lan743x: support WOL in MAC even when PHY
 does not

The 02/26/2024 13:39, Raju Lakkaraju wrote:
> Allow WOL support if MAC supports it, even if the PHY does not support it
> 
> Fixes: e9e13b6adc338 ("lan743x: fix for potential NULL pointer dereference
> with bare card")
> 
Please no spaces between the tags. And you should not split on multiple
line Fixes tag.

> Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
> ---
>  drivers/net/ethernet/microchip/lan743x_ethtool.c | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c b/drivers/net/ethernet/microchip/lan743x_ethtool.c
> index a2b3f4433ca8..4899582b3d1d 100644
> --- a/drivers/net/ethernet/microchip/lan743x_ethtool.c
> +++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c
> @@ -1163,6 +1163,17 @@ static int lan743x_ethtool_set_wol(struct net_device *netdev,
>  				   struct ethtool_wolinfo *wol)
>  {
>  	struct lan743x_adapter *adapter = netdev_priv(netdev);
> +	int ret;
> +
> +	if (netdev->phydev) {
> +		ret = phy_ethtool_set_wol(netdev->phydev, wol);
> +		if (ret != -EOPNOTSUPP && ret != 0)
> +			return ret;
> +
> +		if (ret == -EOPNOTSUPP)
> +			netif_info(adapter, drv, adapter->netdev,
> +				   "phy does not support WOL\n");
> +	}
>  
>  	adapter->wolopts = 0;
>  	if (wol->wolopts & WAKE_UCAST)
> @@ -1187,8 +1198,7 @@ static int lan743x_ethtool_set_wol(struct net_device *netdev,
>  
>  	device_set_wakeup_enable(&adapter->pdev->dev, (bool)wol->wolopts);
>  
> -	return netdev->phydev ? phy_ethtool_set_wol(netdev->phydev, wol)
> -			: -ENETDOWN;
> +	return 0;
>  }
>  #endif /* CONFIG_PM */
>  
> -- 
> 2.34.1
> 

-- 
/Horatiu