linux-kernel - Re: [PATCH net-next 2/2] bnxt_en: define sriov

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Message-ID: <CAK8P3a0aNc0wn0ofhC+fdAA4TeKdWB75545uPAnAi=OQnN572Q@mail.gmail.com>
Date:   Thu, 27 Jul 2017 11:53:33 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Sathya Perla <sathya.perla@...adcom.com>
Cc:     Michael Chan <michael.chan@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        Somnath Kotur <somnath.kotur@...adcom.com>,
        Netdev <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 2/2] bnxt_en: define sriov_lock unconditionally

On Thu, Jul 27, 2017 at 11:00 AM, Sathya Perla
<sathya.perla@...adcom.com> wrote:
> On Thu, Jul 27, 2017 at 1:18 PM, Arnd Bergmann <arnd@...db.de> wrote:
> [...]
>>
>> On today's linux-next:
>>
>> drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.o: In function `bnxt_dl_register':
>> bnxt_vfr.c:(.text+0x1440): undefined reference to `devlink_alloc'
>> bnxt_vfr.c:(.text+0x14c0): undefined reference to `devlink_register'
>> bnxt_vfr.c:(.text+0x14e0): undefined reference to `devlink_free'
>> drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.o: In function `bnxt_dl_unregister':
>> bnxt_vfr.c:(.text+0x1534): undefined reference to `devlink_unregister'
>> bnxt_vfr.c:(.text+0x153c): undefined reference to `devlink_free'
>>
>> I think you are just missing a "depends on MAY_USE_DEVLINK"
>> in INFINIBAND_BNXT_RE, which uses 'select BNXT'.
>>
>> This is a tricky corner case for Kconfig, where the MAY_USE_DEVLINK
>> dependency is silently ignored for BNXT as long as MAY_USE_DEVLINK
>> is not "=n".
>
> Can you pls share your .config so that I can reproduce this issue and
> ensure that my fix really works...

The configuration I used happened to be for arm64, I've pasted it to
https://pastebin.com/dl/rSJ6jCQM now.

You should be able to reproduce it on x86 as well, with anything using
CONFIG_NET_DEVLINK=m and INFINIBAND_BNXT_RE=y.

        Arnd