linux-kernel - Re: [PATCH net-next] net: dsa: Fix dependencies with HSR

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Message-ID: <CAFSKS=M2+mHZvG+OWBTM4YiCr4+p4Lh3917fL_7XUw_jCm1CFA@mail.gmail.com>
Date:   Sat, 20 Feb 2021 08:24:41 -0600
From:   George McCollister <george.mccollister@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] net: dsa: Fix dependencies with HSR

On Fri, Feb 19, 2021 at 11:14 PM Florian Fainelli <f.fainelli@...il.com> wrote:
>
>
>
> On 2/19/2021 9:12 PM, Florian Fainelli wrote:
> > The core DSA framework uses hsr_is_master() which would not resolve to a
> > valid symbol if HSR is built-into the kernel and DSA is a module.
> >
> > Fixes: 18596f504a3e ("net: dsa: add support for offloading HSR")
> > Reported-by: kernel test robot <lkp@...el.com>
> > Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> > ---
> > David, Jakub,
> >
> > This showed up in linux-next which means it will show up in Linus' tree
> > soon as well when your pull request gets sent out.
>
> I had initially considered making is_hsr_master() a static inline that
> would compare dev->dev.type->name with "hsr" since the HSR master would
> set a custom dev_type, however the xrs700x driver would still fail to
> link because it calls hsr_get_version() and for that one there is no
> easy solution.

Thanks for looking into this. It's not something I've run into before.
It didn't occur to me what would happen if HSR was a module. I'll look
out for this in the future.

Sorry for the inconvenience.

Reviewed-by: George McCollister <george.mccollister@...il.com>

-George

> --
> Florian