netdev - Re: [PATCH v2] net: dsa: restrict SMSC_LAN9303

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Date:   Fri, 20 May 2022 19:09:16 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     netdev@...r.kernel.org, patches@...ts.linux.dev,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Juergen Borleis <jbe@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Mans Rullgard <mans@...sr.com>
Subject: Re: [PATCH v2] net: dsa: restrict SMSC_LAN9303_I2C kconfig

On Thu, May 19, 2022 at 10:15:23PM -0700, Randy Dunlap wrote:
> Since kconfig 'select' does not follow dependency chains, if symbol KSA
> selects KSB, then KSA should also depend on the same symbols that KSB
> depends on, in order to prevent Kconfig warnings and possible build
> errors.
> 
> Change NET_DSA_SMSC_LAN9303_I2C and NET_DSA_SMSC_LAN9303_MDIO so that
> they are limited to VLAN_8021Q if the latter is enabled. This prevents
> the Kconfig warning:
> 
> WARNING: unmet direct dependencies detected for NET_DSA_SMSC_LAN9303
>   Depends on [m]: NETDEVICES [=y] && NET_DSA [=y] && (VLAN_8021Q [=m] || VLAN_8021Q [=m]=n)
>   Selected by [y]:
>   - NET_DSA_SMSC_LAN9303_I2C [=y] && NETDEVICES [=y] && NET_DSA [=y] && I2C [=y]
> 
> Fixes: 430065e26719 ("net: dsa: lan9303: add VLAN IDs to master device")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Andrew Lunn <andrew@...n.ch>
> Cc: Vivien Didelot <vivien.didelot@...il.com>
> Cc: Florian Fainelli <f.fainelli@...il.com>
> Cc: Vladimir Oltean <olteanv@...il.com>
> Cc: Juergen Borleis <jbe@...gutronix.de>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Paolo Abeni <pabeni@...hat.com>
> Cc: Mans Rullgard <mans@...sr.com>
> ---

Reviewed-by: Vladimir Oltean <olteanv@...il.com>