RE: [PATCH RESEND v2 1/2] net: phy: at803x: fix the wol setting functions

Leo Li
2023-03-22T19:56:07Z

> -----Original Message-----
> From: Jakub Kicinski <kuba@kernel.org>
> Sent: Friday, March 3, 2023 7:29 PM
> To: Leo Li <leoyang.li@nxp.com>
> Cc: Andrew Lunn <andrew@lunn.ch>; Heiner Kallweit
> <hkallweit1@gmail.com>; Russell King <linux@armlinux.org.uk>; David S .
> Miller <davem@davemloft.net>; David Bauer <mail@david-bauer.net>;
> netdev@vger.kernel.org; linux-kernel@vger.kernel.org; Viorel Suman
> <viorel.suman@nxp.com>; Wei Fang <wei.fang@nxp.com>
> Subject: Re: [PATCH RESEND v2 1/2] net: phy: at803x: fix the wol setting
> functions
>
> On Tue, 28 Feb 2023 21:01:25 -0600 Li Yang wrote:
> > In 7beecaf7d507 ("net: phy: at803x: improve the WOL feature"), it
> > seems not correct to use a wol_en bit in a 1588 Control Register which
> > is only available on AR8031/AR8033(share the same phy_id) to determine
> > if WoL is enabled. Change it back to use AT803X_INTR_ENABLE_WOL for
> > determining the WoL status which is applicable on all chips supporting
> > wol. Also update the at803x_set_wol() function to only update the 1588
> > register on chips having it. After this change, disabling wol at
> > probe from d7cd5e06c9dd ("net: phy: at803x: disable WOL at probe") is
> > no longer needed. So that part is removed.
> >
> > Fixes: 7beecaf7d507b ("net: phy: at803x: improve the WOL feature")
>
> Given the fixes tag Luo Jie <luoj@codeaurora.org> should be CCed.

Sorry for the late response, I missed this email. I tried to cc him, but the email bounced.

>
> > Signed-off-by: Li Yang <leoyang.li@nxp.com>
> > Reviewed-by: Viorel Suman <viorel.suman@nxp.com>
> > Reviewed-by: Wei Fang <wei.fang@nxp.com>
> > ---
> > drivers/net/phy/at803x.c | 40
> > ++++++++++++++++------------------------
> > 1 file changed, 16 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index
> > 22f4458274aa..2102279b3964 100644
> > --- a/drivers/net/phy/at803x.c
> > +++ b/drivers/net/phy/at803x.c
> > @@ -461,21 +461,25 @@ 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 function for 1588 */
> > + if (phydev->drv->phy_id == ATH8031_PHY_ID) {
> > + ret = phy_modify_mmd(phydev, MDIO_MMD_PCS,
> > +AT803X_PHY_MMD3_WOL_CTRL,
>
> This line is now too long, unless there is a good reason please stick to the 80
> char maximum.
>
> > + 0, AT803X_WOL_EN);
>
> while at it please fix the alignment, the continuation line should start under
> phydev (checkpatch will tell you)
>
> > + if (ret)
> > + return ret;
> > + }
> > /* Enable WOL interrupt */
> > ret = phy_modify(phydev, AT803X_INTR_ENABLE, 0,
> AT803X_INTR_ENABLE_WOL);
> > if (ret)
> > return ret;
> > } 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 function for 1588 */
> > + if (phydev->drv->phy_id == ATH8031_PHY_ID) {
> > + ret = phy_modify_mmd(phydev, MDIO_MMD_PCS,
> AT803X_PHY_MMD3_WOL_CTRL,
> > + AT803X_WOL_EN, 0);
>
> same comments as above
>
> > + if (ret)
> > + return ret;
> > + }
> > /* Disable WOL interrupt */
> > ret = phy_modify(phydev, AT803X_INTR_ENABLE,
> AT803X_INTR_ENABLE_WOL, 0);
> > if (ret)
> > @@ -510,11 +514,8 @@ static void at803x_get_wol(struct phy_device
> *phydev,
> > wol->supported = WAKE_MAGIC;
> > wol->wolopts = 0;
> >
> > - value = phy_read_mmd(phydev, MDIO_MMD_PCS,
> AT803X_PHY_MMD3_WOL_CTRL);
> > - if (value < 0)
> > - return;
> > -
> > - if (value & AT803X_WOL_EN)
> > + value = phy_read(phydev, AT803X_INTR_ENABLE);
>
> Does phy_read() never fail? Why remove the error checking?
>
> > + if (value & AT803X_INTR_ENABLE_WOL)
> > wol->wolopts |= WAKE_MAGIC;
> > }
> >