linux-kernel - Re: [PATCH 19/28] brcmfmac: avoid maybe-uninitialized warning in brcmf_cfg80211_start

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Message-ID: <87funj5pr8.fsf@kamboji.qca.qualcomm.com>
Date:   Wed, 26 Oct 2016 14:11:23 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Arend van Spriel <arend.vanspriel@...adcom.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Pieter-Paul Giesberts <pieter-paul.giesberts@...adcom.com>,
        "Franky \(Zhenhui\) Lin" <frankyl@...adcom.com>,
        Rafał Miłecki <rafal@...ecki.pl>,
        linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com, netdev@...r.kernel.org
Subject: Re: [PATCH 19/28] brcmfmac: avoid maybe-uninitialized warning in brcmf_cfg80211_start_ap

Arnd Bergmann <arnd@...db.de> writes:

> On Wednesday, October 26, 2016 9:49:58 AM CEST Kalle Valo wrote:
>> Arnd Bergmann <arnd@...db.de> writes:
>> 
>> > A bugfix added a sanity check around the assignment and use of the
>> > 'is_11d' variable, which looks correct to me, but as the function is
>> > rather complex already, this confuses the compiler to the point where
>> > it can no longer figure out if the variable is always initialized
>> > correctly:
>> >
>> > brcm80211/brcmfmac/cfg80211.c: In function ‘brcmf_cfg80211_start_ap’:
>> > brcm80211/brcmfmac/cfg80211.c:4586:10: error: ‘is_11d’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
>> >
>> > This adds an initialization for the newly introduced case in which
>> > the variable should not really be used, in order to make the warning
>> > go away.
>> >
>> > Fixes: b3589dfe0212 ("brcmfmac: ignore 11d configuration errors")
>> > Cc: Hante Meuleman <hante.meuleman@...adcom.com>
>> > Cc: Arend van Spriel <arend.vanspriel@...adcom.com>
>> > Cc: Kalle Valo <kvalo@...eaurora.org>
>> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
>> 
>> Via which tree are you planning to submit this? Should I take it?
>
> I'd prefer if you can take it and forward it along with your other
> bugfixes. I'll try to take care of the ones that nobody else
> picked up.

Ok, I'll take it. I'm planning to push this to 4.9.

-- 
Kalle Valo