linux-kernel - Re: [PATCH net-next] net: stmmac: Fix ethool link settings ops for integrated PCS

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Date: Mon, 18 Dec 2023 10:14:25 -0600
From: Andrew Halaney <ahalaney@...hat.com>
To: Sneh Shah <quic_snehshah@...cinc.com>
Cc: Vinod Koul <vkoul@...nel.org>, 
	Bhupesh Sharma <bhupesh.sharma@...aro.org>, Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	Jose Abreu <joabreu@...opsys.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>, 
	netdev@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
	linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, kernel@...cinc.com
Subject: Re: [PATCH net-next] net: stmmac: Fix ethool link settings ops for
 integrated PCS

Hi,

I think the subject should be [PATCH net] since this is a fix.

On Mon, Dec 18, 2023 at 07:20:32PM +0530, Sneh Shah wrote:
> Currently get/set_link_ksettings ethtool ops are dependent on PCS.
> When PCS is integrated in MAC, it will not have separate link config.
> Bypass cofiguring and checking PCS link config for integrated PCS.

s/cofiguring/configuring/

Please add:

    Fixes: ("aa571b6275fb net: stmmac: add new switch to struct plat_stmmacenet_data")

This fixes using the ethtool ops for me so also please feel free to add:

    Tested-by: Andrew Halaney <ahalaney@...hat.com> # sa8775p-ride

Thanks for the patch!

> 
> Signed-off-by: Sneh Shah <quic_snehshah@...cinc.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
> index f628411ae4ae..e3ba4cd47b8d 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
> @@ -311,8 +311,9 @@ static int stmmac_ethtool_get_link_ksettings(struct net_device *dev,
>  {
>  	struct stmmac_priv *priv = netdev_priv(dev);
>  
> -	if (priv->hw->pcs & STMMAC_PCS_RGMII ||
> -	    priv->hw->pcs & STMMAC_PCS_SGMII) {
> +	if (!(priv->plat->flags & STMMAC_FLAG_HAS_INTEGRATED_PCS) &&
> +	    (priv->hw->pcs & STMMAC_PCS_RGMII ||
> +	     priv->hw->pcs & STMMAC_PCS_SGMII)) {
>  		struct rgmii_adv adv;
>  		u32 supported, advertising, lp_advertising;
>  
> @@ -397,8 +398,9 @@ stmmac_ethtool_set_link_ksettings(struct net_device *dev,
>  {
>  	struct stmmac_priv *priv = netdev_priv(dev);
>  
> -	if (priv->hw->pcs & STMMAC_PCS_RGMII ||
> -	    priv->hw->pcs & STMMAC_PCS_SGMII) {
> +	if (!(priv->plat->flags & STMMAC_FLAG_HAS_INTEGRATED_PCS) &&
> +	    (priv->hw->pcs & STMMAC_PCS_RGMII ||
> +	     priv->hw->pcs & STMMAC_PCS_SGMII)) {
>  		/* Only support ANE */
>  		if (cmd->base.autoneg != AUTONEG_ENABLE)
>  			return -EINVAL;
> -- 
> 2.17.1
>