Re: [PATCH net] net: phy: mxl-gpy: fix bogus error on USXGMII and integrated PHY

[Maxime Chevallier <maxime.chevallier@bootlin.com>]

On 20/11/2025 15:17, Daniel Golle wrote:
> As the interface mode doesn't need to be updated on PHYs connected with
> USXGMII and integrated PHYs, gpy_update_interface() should just return 0
> in these cases rather than -EINVAL which has wrongly been introduced by
> commit 7a495dde27ebc ("net: phy: mxl-gpy: Change gpy_update_interface()
> function return type"), as this breaks support for those PHYs.
> 
> Fixes: 7a495dde27ebc ("net: phy: mxl-gpy: Change gpy_update_interface() function return type")
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>

That looks correct indeed :)

Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>

Maxime

> ---
>  drivers/net/phy/mxl-gpy.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/phy/mxl-gpy.c b/drivers/net/phy/mxl-gpy.c
> index 0daf0e86844a0..0058284b08f3b 100644
> --- a/drivers/net/phy/mxl-gpy.c
> +++ b/drivers/net/phy/mxl-gpy.c
> @@ -541,7 +541,7 @@ static int gpy_update_interface(struct phy_device *phydev)
>  	/* Interface mode is fixed for USXGMII and integrated PHY */
>  	if (phydev->interface == PHY_INTERFACE_MODE_USXGMII ||
>  	    phydev->interface == PHY_INTERFACE_MODE_INTERNAL)
> -		return -EINVAL;
> +		return 0;
>  
>  	/* Automatically switch SERDES interface between SGMII and 2500-BaseX
>  	 * according to speed. Disable ANEG in 2500-BaseX mode.