linux-kernel - Re: [PATCH] brcmfmac: Fix fallback logic to use firmware's canonical path

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Date:   Fri, 13 Aug 2021 10:55:17 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     trix@...hat.com
Cc:     Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Chi-hsien Lin <chi-hsien.lin@...ineon.com>,
        Wright Feng <wright.feng@...ineon.com>,
        Chung-hsien Hsu <chung-hsien.hsu@...ineon.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Zheng Yongjun <zhengyongjun3@...wei.com>,
        Lee Jones <lee.jones@...aro.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com, netdev <netdev@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] brcmfmac: Fix fallback logic to use firmware's canonical path

On Thu, Aug 12, 2021 at 7:03 PM <trix@...hat.com> wrote:

> From: Tom Rix <trix@...hat.com>
>
> Static analysis reports this problem
> firmware.c:709:6: warning: Branch condition evaluates to a garbage value
>         if (ret) {
>             ^~~
>
> In brcmf_fw_get_firmwares(), ret is only set if the alt_path control
> flow is taken.  Initialize ret to -1, so the canonical path is taken
> if alt_path is not.
>
> Fixes: 5ff013914c62 ("brcmfmac: firmware: Allow per-board firmware binaries")
> Signed-off-by: Tom Rix <trix@...hat.com>

Thanks!

But we are working on a more generic solution to this and other
problems in a patch that Dmitry has asked Kalle to merge.
https://lore.kernel.org/linux-wireless/20210808180510.8753-1-digetx@gmail.com/

Yours,
Linus Walleij