netdev - Re: [PATCH net v2 2/4] net: wangxun: fix to change Rx features

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Message-ID: <20240502083614.GC2821784@kernel.org>
Date: Thu, 2 May 2024 09:36:14 +0100
From: Simon Horman <horms@...nel.org>
To: Jiawen Wu <jiawenwu@...stnetic.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, rmk+kernel@...linux.org.uk, andrew@...n.ch,
	netdev@...r.kernel.org, mengyuanlou@...-swift.com,
	duanqiangwen@...-swift.com
Subject: Re: [PATCH net v2 2/4] net: wangxun: fix to change Rx features

On Mon, Apr 29, 2024 at 06:25:17PM +0800, Jiawen Wu wrote:
> Fix the issue where some Rx features cannot be changed.
> 
> When using ethtool -K to turn off rx offload, it returns error and
> displays "Could not change any device features". And netdev->features
> is not assigned a new value to actually configure the hardware.
> 
> Fixes: 6dbedcffcf54 ("net: libwx: Implement xx_set_features ops")
> Signed-off-by: Jiawen Wu <jiawenwu@...stnetic.com>

Reviewed-by: Simon Horman <horms@...nel.org>

> ---
>  drivers/net/ethernet/wangxun/libwx/wx_lib.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> index 6fae161cbcb8..667a5675998c 100644
> --- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> +++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
> @@ -2690,12 +2690,14 @@ int wx_set_features(struct net_device *netdev, netdev_features_t features)
>  		wx->rss_enabled = false;
>  	}
>  
> +	netdev->features = features;
> +

nit: I think it would be slightly nicer to place this
     at the end of the function, just before return.
     But it would make no difference to the logic,
     so I don't feel strongly about this.

>  	if (changed &
>  	    (NETIF_F_HW_VLAN_CTAG_RX |
>  	     NETIF_F_HW_VLAN_STAG_RX))
>  		wx_set_rx_mode(netdev);
>  
> -	return 1;
> +	return 0;
>  }
>  EXPORT_SYMBOL(wx_set_features);
>  
> -- 
> 2.27.0
> 
>