Subject: Re: [PATCH net-next v2 3/5] net: sfp: create/destroy I2C mdiobus before PHY probe/after PHY release

From: Russell King - ARM Linux admin <[email-masked]>
Date: Fri, 30 Oct 2020 16:31:58 +0000

On Thu, Oct 29, 2020 at 11:25:07PM +0100, Marek Behún wrote:
> @@ -1936,8 +1950,10 @@ static void sfp_sm_main(struct sfp *sfp, unsigned int event)
>  			sfp_sm_link_down(sfp);
>  		if (sfp->sm_state > SFP_S_INIT)
>  			sfp_module_stop(sfp->sfp_bus);
> -		if (sfp->mod_phy)
> +		if (sfp->mod_phy) {
>  			sfp_sm_phy_detach(sfp);
> +			sfp_i2c_mdiobus_destroy(sfp);
> +		}

		if (sfp->mod_phy)
			sfp_sm_phy_detach(sfp);
		if (sfp->i2c_mii)
			sfp_i2c_mdiobus_destroy(sfp);

would be better IMHO, in case we end up with the MDIO bus registered
but don't discover a PHY. (which is entirely possible with Mikrotik
SFPs where the PHY is not accessible.)

Other than that, I don't see any obvious issues.

Thanks.

-- 
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