linux-kernel - Re: [PATCH] net: usb: ax88179_178a: improve link status logs

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Date: Tue, 18 Jun 2024 12:15:05 +0100
From: Simon Horman <horms@...nel.org>
To: Jose Ignacio Tornos Martinez <jtornosm@...hat.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, linux-usb@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] net: usb: ax88179_178a: improve link status logs

On Mon, Jun 17, 2024 at 12:33:59PM +0200, Jose Ignacio Tornos Martinez wrote:
> Avoid spurious link status logs that may ultimately be wrong; for example,
> if the link is set to down with the cable plugged, then the cable is
> unplugged and afer this the link is set to up, the last new log that is
> appearing is incorrectly telling that the link is up.
> 
> In order to aovid errors, show link status logs after link_reset
> processing, and in order to avoid spurious as much as possible, only show
> the link loss when some link status change is detected.
> 
> cc: stable@...r.kernel.org
> Fixes: e2ca90c276e1 ("ax88179_178a: ASIX AX88179_178A USB 3.0/2.0 to gigabit ethernet adapter driver")
> Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@...hat.com>
> ---
>  drivers/net/usb/ax88179_178a.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c
> index c2fb736f78b2..60357796be99 100644
> --- a/drivers/net/usb/ax88179_178a.c
> +++ b/drivers/net/usb/ax88179_178a.c
> @@ -326,7 +326,8 @@ static void ax88179_status(struct usbnet *dev, struct urb *urb)
>  
>  	if (netif_carrier_ok(dev->net) != link) {
>  		usbnet_link_change(dev, link, 1);
> -		netdev_info(dev->net, "ax88179 - Link status is: %d\n", link);
> +		if (!link)
> +			netdev_info(dev->net, "ax88179 - Link status is: %d\n", link);

Sorry Jose,

one more nit I noticed after sending my previous email.

The line above looks like it could be wrapped to <= 80 columns wide,
which is still preferred for Networking code.

Flagged by checkpatch.pl --max-line-length=80

>  	}
>  }
>  

...