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

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Message-ID: <897594cde5f294f9d5e96917bce1ac751338d0aa.camel@pengutronix.de>
Date:   Tue, 28 Jun 2022 09:50:42 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Oleksij Rempel <o.rempel@...gutronix.de>,
        "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>, Lukas Wunner <lukas@...ner.de>,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        netdev@...r.kernel.org
Subject: Re: [PATCH net v1 1/2] net: asix: fix "can't send until first
 packet is send" issue

Hi Oleksij,

subject of this patch looks strange. It should probably read "can't
receive until first packet is sent".

Regards,
Lucas

Am Dienstag, dem 28.06.2022 um 06:49 +0200 schrieb Oleksij Rempel:
> 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
> > 
> > 
>