netdev - Re: [PATCH net v1 1/2] net: asix: fix "can't send until first packet is send" issue

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Message-ID: <20220628044913.GB13092@pengutronix.de>
Date:   Tue, 28 Jun 2022 06:49:13 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Anton Lundin <glance@....umu.se>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Lukas Wunner <lukas@...ner.de>
Subject: Re: [PATCH net v1 1/2] net: asix: fix "can't send until first packet
 is send" issue

On Fri, Jun 24, 2022 at 09:51:38AM +0200, Oleksij Rempel wrote:
> If cable is attached after probe sequence, the usbnet framework would
> not automatically start processing RX packets except at least one
> packet was transmitted.
> 
> On systems with any kind of address auto configuration this issue was
> not detected, because some packets are send immediately after link state
> is changed to "running".
> 
> With this patch we will notify usbnet about link status change provided by the
> PHYlib.
> 
> Fixes: e532a096be0e ("net: usb: asix: ax88772: add phylib support")
> Reported-by: Anton Lundin <glance@....umu.se>
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>

In different mail thread Anton reported as tested.
Tested-by: Anton Lundin <glance@....umu.se>

> ---
>  drivers/net/usb/asix_common.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
> index 632fa6c1d5e3..b4a1b7abcfc9 100644
> --- a/drivers/net/usb/asix_common.c
> +++ b/drivers/net/usb/asix_common.c
> @@ -431,6 +431,7 @@ void asix_adjust_link(struct net_device *netdev)
>  
>  	asix_write_medium_mode(dev, mode, 0);
>  	phy_print_status(phydev);
> +	usbnet_link_change(dev, phydev->link, 0);
>  }
>  
>  int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm)
> -- 
> 2.30.2
> 
> 

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