Re: [PATCH v3 03/13] net: phy: at803x: improve the WOL feature

[Jie Luo]

On 10/19/2021 2:41 AM, Andrew Lunn wrote:
> > @@ -348,18 +349,29 @@ static int at803x_set_wol(struct phy_device *phydev,
> >   			phy_write_mmd(phydev, MDIO_MMD_PCS, offsets[i],
> >   				      mac[(i * 2) + 1] | (mac[(i * 2)] << 8));
> >   
> > +		/* Enable WOL function */
> > +		ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, AT803X_PHY_MMD3_WOL_CTRL,
> > +				0, AT803X_WOL_EN);
> > +		if (ret)
> > +			return ret;
> > +		/* Enable WOL interrupt */
> >   		ret = phy_modify(phydev, AT803X_INTR_ENABLE, 0, AT803X_INTR_ENABLE_WOL);
> >   		if (ret)
> >   			return ret;
> > -		value = phy_read(phydev, AT803X_INTR_STATUS);
> >   	} else {
> > +		/* Disable WoL function */
> > +		ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, AT803X_PHY_MMD3_WOL_CTRL,
> > +				AT803X_WOL_EN, 0);
> > +		if (ret)
> > +			return ret;
> > +		/* Disable WOL interrupt */
> >   		ret = phy_modify(phydev, AT803X_INTR_ENABLE, AT803X_INTR_ENABLE_WOL, 0);
> >   		if (ret)
> >   			return ret;
> > -		value = phy_read(phydev, AT803X_INTR_STATUS);
> >   	}
> >   
> > -	return ret;
> > +	/* Clear WOL status */
> > +	return phy_read(phydev, AT803X_INTR_STATUS);
> It looks like you could be clearing other interrupt bits which have
> not been serviced yet. Is it possible to clear just WoL?

Hi Andrew,

when this register AT803X_INTR_STATUS bits are cleared after read, we 
can't clear only WOL interrupt here.

> Also, you are returning the contents of the interrupt status register?
> You should probably be returning 0 if the read was successful.
thanks for this comments, will correct it in the next patch set.
>      Andrew