linux-kernel - Re: [PATCH] net: phy: marvell: replace __phy

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Date:   Mon, 30 Nov 2020 10:25:56 +0000
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Yejune Deng <yejune.deng@...il.com>
Cc:     andrew@...n.ch, hkallweit1@...il.com, davem@...emloft.net,
        kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: phy: marvell: replace __phy_modify()

On Mon, Nov 30, 2020 at 06:16:39PM +0800, Yejune Deng wrote:
> a set of phy_set_bits() looks more neater
> 
> Signed-off-by: Yejune Deng <yejune.deng@...il.com>

Sorry, but NAK. You seem to be doing a mechanical code change without
first understanding the code, as the patch shows no sign of an
understanding of the difference between phy_modify() and __phy_modify().
This means you are introducing new bugs with this change.

Please investigate the differences between the two variants of
phy_modify() and post a more correct patch.

Thanks.

> ---
>  drivers/net/phy/marvell.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
> index 587930a..f402e7f 100644
> --- a/drivers/net/phy/marvell.c
> +++ b/drivers/net/phy/marvell.c
> @@ -1132,8 +1132,8 @@ static int m88e1510_config_init(struct phy_device *phydev)
>  			return err;
>  
>  		/* PHY reset is necessary after changing MODE[2:0] */
> -		err = phy_modify(phydev, MII_88E1510_GEN_CTRL_REG_1, 0,
> -				 MII_88E1510_GEN_CTRL_REG_1_RESET);
> +		err = phy_set_bits(phydev, MII_88E1510_GEN_CTRL_REG_1,
> +				   MII_88E1510_GEN_CTRL_REG_1_RESET);
>  		if (err < 0)
>  			return err;
>  
> @@ -1725,7 +1725,7 @@ static int m88e1318_set_wol(struct phy_device *phydev,
>  			__phy_read(phydev, MII_M1011_IEVENT);
>  
>  		/* Enable the WOL interrupt */
> -		err = __phy_modify(phydev, MII_88E1318S_PHY_CSIER, 0,
> +		err = phy_set_bits(phydev, MII_88E1318S_PHY_CSIER,
>  				   MII_88E1318S_PHY_CSIER_WOL_EIE);
>  		if (err < 0)
>  			goto error;
> @@ -1735,10 +1735,10 @@ static int m88e1318_set_wol(struct phy_device *phydev,
>  			goto error;
>  
>  		/* Setup LED[2] as interrupt pin (active low) */
> -		err = __phy_modify(phydev, MII_88E1318S_PHY_LED_TCR,
> -				   MII_88E1318S_PHY_LED_TCR_FORCE_INT,
> -				   MII_88E1318S_PHY_LED_TCR_INTn_ENABLE |
> -				   MII_88E1318S_PHY_LED_TCR_INT_ACTIVE_LOW);
> +		err = phy_modify(phydev, MII_88E1318S_PHY_LED_TCR,
> +				 MII_88E1318S_PHY_LED_TCR_FORCE_INT,
> +				 MII_88E1318S_PHY_LED_TCR_INTn_ENABLE |
> +				 MII_88E1318S_PHY_LED_TCR_INT_ACTIVE_LOW);
>  		if (err < 0)
>  			goto error;
>  
> @@ -1764,7 +1764,7 @@ static int m88e1318_set_wol(struct phy_device *phydev,
>  			goto error;
>  
>  		/* Clear WOL status and enable magic packet matching */
> -		err = __phy_modify(phydev, MII_88E1318S_PHY_WOL_CTRL, 0,
> +		err = phy_set_bits(phydev, MII_88E1318S_PHY_WOL_CTRL,
>  				   MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS |
>  				   MII_88E1318S_PHY_WOL_CTRL_MAGIC_PACKET_MATCH_ENABLE);
>  		if (err < 0)
> @@ -1775,9 +1775,9 @@ static int m88e1318_set_wol(struct phy_device *phydev,
>  			goto error;
>  
>  		/* Clear WOL status and disable magic packet matching */
> -		err = __phy_modify(phydev, MII_88E1318S_PHY_WOL_CTRL,
> -				   MII_88E1318S_PHY_WOL_CTRL_MAGIC_PACKET_MATCH_ENABLE,
> -				   MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS);
> +		err = phy_modify(phydev, MII_88E1318S_PHY_WOL_CTRL,
> +				 MII_88E1318S_PHY_WOL_CTRL_MAGIC_PACKET_MATCH_ENABLE,
> +				 MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS);
>  		if (err < 0)
>  			goto error;
>  	}
> @@ -1995,7 +1995,7 @@ static int marvell_cable_test_start_common(struct phy_device *phydev)
>  		return bmsr;
>  
>  	if (bmcr & BMCR_ANENABLE) {
> -		ret =  phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
> +		ret =  phy_clear_bits(phydev, MII_BMCR, BMCR_ANENABLE);
>  		if (ret < 0)
>  			return ret;
>  		ret = genphy_soft_reset(phydev);
> -- 
> 1.9.1
> 
> 

-- 
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