linux-kernel - Re: [PATCH 1/2] net/stmmac: don't go through ethtool to start autonegociation

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Message-ID: <4DC941D4.8030409@st.com>
Date:	Tue, 10 May 2011 15:47:00 +0200
From:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
To:	David Decotigny <decot@...gle.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Joe Perches <joe@...ches.com>,
	Stanislaw Gruszka <sgruszka@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] net/stmmac: don't go through ethtool to start autonegociation

On 5/10/2011 2:19 AM, David Decotigny wrote:
> The driver used to call phy's ethtool configuration routine to start
> autonegociation. This change has it call directly phy's routine to
> start autonegociation.
> 
> IMPORTANT: initial version was hiding phy_start_aneg() return value,
>            this patch returns it (<0 upon error).
> 
> Tested: module compiles, NOT tested on real hardware.
> Signed-off-by: David Decotigny <decot@...gle.com>

Sorry for the delay, I'm doing some tests with the stmmac on a "real"
HW. I'll come back asap.

Regards
Peppe

> ---
>  drivers/net/stmmac/stmmac_ethtool.c |   13 ++-----------
>  1 files changed, 2 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/net/stmmac/stmmac_ethtool.c b/drivers/net/stmmac/stmmac_ethtool.c
> index 6f5aaeb..9c05cf0 100644
> --- a/drivers/net/stmmac/stmmac_ethtool.c
> +++ b/drivers/net/stmmac/stmmac_ethtool.c
> @@ -236,17 +236,8 @@ stmmac_set_pauseparam(struct net_device *netdev,
>  	priv->flow_ctrl = new_pause;
>  
>  	if (phy->autoneg) {
> -		if (netif_running(netdev)) {
> -			struct ethtool_cmd cmd = { .cmd = ETHTOOL_SSET };
> -			/* auto-negotiation automatically restarted */
> -			cmd.supported = phy->supported;
> -			cmd.advertising = phy->advertising;
> -			cmd.autoneg = phy->autoneg;
> -			ethtool_cmd_speed_set(&cmd, phy->speed);
> -			cmd.duplex = phy->duplex;
> -			cmd.phy_address = phy->addr;
> -			ret = phy_ethtool_sset(phy, &cmd);
> -		}
> +		if (netif_running(netdev))
> +			ret = phy_start_aneg(phy);
>  	} else
>  		priv->hw->mac->flow_ctrl(priv->ioaddr, phy->duplex,
>  					 priv->flow_ctrl, priv->pause);

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