netdev - Re: [PATCH] net phy: Check for aneg completion before setting state to PHY

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Message-ID: <CAGVrzcbrm3KO_=NSJz=KOAcPWvVUMm5kPM7nryJBag6BotKgoQ@mail.gmail.com>
Date:	Thu, 24 Apr 2014 11:53:51 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Balakumaran Kannan <kumaran.4353@...il.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] net phy: Check for aneg completion before setting state
 to PHY_RUNNING

2014-04-23 19:52 GMT-07:00 Balakumaran Kannan <kumaran.4353@...il.com>:
> phy_state_machine should check whether auto-negotiatin is completed
> before changing phydev->state from PHY_NOLINK to PHY_RUNNING. If
> auto-negotiation is not completed phydev->state should be set to
> PHY_AN.

I need some time to review this. Just out of curiosity, is this fixing
a bug you have encountered or was this found by state machine
inspection?

>
> Signed-off-by: Balakumaran Kannan <kumaran.4353@...il.com>
> ---
>  drivers/net/phy/phy.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
> index 1b6d09a..a972056 100644
> --- a/drivers/net/phy/phy.c
> +++ b/drivers/net/phy/phy.c
> @@ -765,6 +765,17 @@ void phy_state_machine(struct work_struct *work)
>                         break;
>
>                 if (phydev->link) {
> +                       if (AUTONEG_ENABLE == phydev->autoneg) {
> +                               err = phy_aneg_done(phydev);
> +                               if (err < 0)
> +                                       break;
> +
> +                               if (!err) {
> +                                       phydev->state = PHY_AN;
> +                                       phydev->link_timeout = PHY_AN_TIMEOUT;
> +                                       break;
> +                               }
> +                       }
>                         phydev->state = PHY_RUNNING;
>                         netif_carrier_on(phydev->attached_dev);
>                         phydev->adjust_link(phydev->attached_dev);
> --
> 1.8.2.1



-- 
Florian
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