netdev - Re: [PATCH net-next] net: phy: at803x: simplify custom phy id matching

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Message-ID: <YPbar746WVjp9emp@lunn.ch>
Date:   Tue, 20 Jul 2021 16:16:15 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Russell King <rmk+kernel@...linux.org.uk>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH net-next] net: phy: at803x: simplify custom phy id
 matching

On Tue, Jul 20, 2021 at 02:33:49PM +0100, Russell King wrote:
> The at803x driver contains a function, at803x_match_phy_id(), which
> tests whether the PHY ID matches the value passed, comparing phy_id
> with phydev->phy_id and testing all bits that in the driver's mask.
> 
> This is the same test that is used to match the driver, with phy_id
> replaced with the driver specified ID, phydev->drv->phy_id.
> 
> Hence, we already know the value of the bits being tested if we look
> at phydev->drv->phy_id directly, and we do not require a complicated
> test to check them. Test directly against phydev->drv->phy_id instead.
> 
> Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew