netdev - Re: brcmsmac: fix wrap around in conversion from constant to s16

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Date:   Wed, 27 Jun 2018 15:57:07 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Stefan Agner <stefan@...er.ch>
Cc:     Stefan Agner <stefan@...er.ch>,
        Tobias Regnery <tobias.regnery@...il.com>,
        Arend van Spriel <arend.vanspriel@...adcom.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Chi-Hsien Lin <chi-hsien.lin@...ress.com>,
        Wright Feng <wright.feng@...ress.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        brcm80211-dev-list@...ress.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: brcmsmac: fix wrap around in conversion from constant to s16

Stefan Agner <stefan@...er.ch> wrote:

> The last value in the log_table wraps around to a negative value
> since s16 has a value range of -32768 to 32767. This is not what
> the table intends to represent. Use the closest positive value
> 32767.
> 
> This fixes a warning seen with clang:
> drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c:216:2: warning:
>       implicit conversion from 'int' to 's16' (aka 'short') changes
> value from 32768
>       to -32768 [-Wconstant-conversion]
>         32768
>         ^~~~~
> 1 warning generated.
> 
> Fixes: 4c0bfeaae9f9 ("brcmsmac: fix array out-of-bounds access in qm_log10")
> Cc: Tobias Regnery <tobias.regnery@...il.com>
> Signed-off-by: Stefan Agner <stefan@...er.ch>

Patch applied to wireless-drivers-next.git, thanks.

c9a61469fc97 brcmsmac: fix wrap around in conversion from constant to s16

-- 
https://patchwork.kernel.org/patch/10468755/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches