netdev - Re: [PATCH net 1/3] net: dsa: mv88e6xxx: use BMSR_ANEGCOMPLETE bit for filling an

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Message-ID: <YlcaiKD1zcM6ztsK@lunn.ch>
Date:   Wed, 13 Apr 2022 20:46:32 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Russell King <rmk+kernel@...linux.org.uk>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Marek Behún <kabel@...nel.org>,
        netdev@...r.kernel.org
Subject: Re: [PATCH net 1/3] net: dsa: mv88e6xxx: use BMSR_ANEGCOMPLETE bit
 for filling an_complete

On Wed, Apr 13, 2022 at 05:53:52PM +0100, Russell King wrote:
> From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@...nel.org>

Hi Russell

Does git am parse that correctly? At least it is something
Jakub/DaveM/Paolo needs to keep an eye on when they accept the series.

> 
> Commit ede359d8843a ("net: dsa: mv88e6xxx: Link in pcs_get_state() if AN
> is bypassed") added the ability to link if AN was bypassed, and added
> filling of state->an_complete field, but set it to true if AN was
> enabled in BMCR, not when AN was reported complete in BMSR.
> 
> This was done because for some reason, when I wanted to use BMSR value
> to infer an_complete, I was looking at BMSR_ANEGCAPABLE bit (which was
> always 1), instead of BMSR_ANEGCOMPLETE bit.
> 
> Use BMSR_ANEGCOMPLETE for filling state->an_complete.
> 
> Fixes: ede359d8843a ("net: dsa: mv88e6xxx: Link in pcs_get_state() if AN is bypassed")
> Signed-off-by: Marek Behún <kabel@...nel.org>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
>  drivers/net/dsa/mv88e6xxx/serdes.c | 27 +++++++++++----------------
>  1 file changed, 11 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
> index 7b37d45bc9fb..1a19c5284f2c 100644
> --- a/drivers/net/dsa/mv88e6xxx/serdes.c
> +++ b/drivers/net/dsa/mv88e6xxx/serdes.c
> @@ -50,22 +50,17 @@ static int mv88e6390_serdes_write(struct mv88e6xxx_chip *chip,
>  }
>  
>  static int mv88e6xxx_serdes_pcs_get_state(struct mv88e6xxx_chip *chip,
> -					  u16 ctrl, u16 status, u16 lpa,
> +					  u16 bmsr, u16 lpa, u16 status,
>  					  struct phylink_link_state *state)
>  {
>  	state->link = !!(status & MV88E6390_SGMII_PHY_STATUS_LINK);
> +	state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);
>  
>  	if (status & MV88E6390_SGMII_PHY_STATUS_SPD_DPL_VALID) {
>  		/* The Spped and Duplex Resolved register is 1 if AN is enabled

It looks like there is a typ0 here for speed.

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew