netdev - Re: [PATCH net-next] net: phy: phy_support_sym

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Date:   Sun, 21 Oct 2018 08:54:29 +0200
From:   LABBE Corentin <clabbe@...libre.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>, hkallweit1@...il.com
Subject: Re: [PATCH net-next] net: phy: phy_support_sym_pause: Clear Asym
 Pause

On Sat, Oct 20, 2018 at 10:41:28PM +0200, Andrew Lunn wrote:
> When indicating the MAC supports Symmetric Pause, clear the Asymmetric
> Pause bit, which could of been already set is the PHY supports it.
> 
> Reported-by: Labbe Corentin <clabbe@...libre.com>
> Fixes: c306ad36184f ("net: ethernet: Add helper for MACs which support pause")
> Signed-off-by: Andrew Lunn <andrew@...n.ch>
> ---
>  drivers/net/phy/phy_device.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index 43cb08dcce81..ab33d1777132 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -1940,6 +1940,7 @@ EXPORT_SYMBOL(phy_remove_link_mode);
>   */
>  void phy_support_sym_pause(struct phy_device *phydev)
>  {
> +	phydev->supported &= ~SUPPORTED_Asym_Pause;
>  	phydev->supported |= SUPPORTED_Pause;
>  	phydev->advertising = phydev->supported;
>  }
> -- 
> 2.19.0
> 

Thanks, it made my imx6q-sabrelite works again with next-20181019.
Tested-by: Corentin Labbe <clabbe@...libre.com>

For completeness, this is the ethtool output which confirm it.
ethtool version 4.16
Settings for eth0:
	Supported ports: [ TP MII ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Full 
	Supported pause frame use: Symmetric
	Supports auto-negotiation: Yes
	Supported FEC modes: Not reported
	Advertised link modes:  10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Full 
	Advertised pause frame use: Symmetric
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Link partner advertised link modes:  10baseT/Half 10baseT/Full 
	                                     100baseT/Half 100baseT/Full 
	                                     1000baseT/Half 1000baseT/Full 
	Link partner advertised pause frame use: Symmetric Receive-only
	Link partner advertised auto-negotiation: Yes
	Link partner advertised FEC modes: Not reported
	Speed: 1000Mb/s
	Duplex: Full
	Port: MII
	PHYAD: 6
	Transceiver: internal
	Auto-negotiation: on
	Supports Wake-on: d
	Wake-on: d
	Link detected: yes