linux-kernel - Re: [PATCH] brcmsmac: fix shift on 4 bit masked value

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Date:   Wed, 07 Apr 2021 14:37:56 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Colin King <colin.king@...onical.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>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] brcmsmac: fix shift on 4 bit masked value

Colin King <colin.king@...onical.com> writes:

> From: Colin Ian King <colin.king@...onical.com>
>
> The calculation of offtune_val seems incorrect, the u16 value in
> pi->tx_rx_cal_radio_saveregs[2] is being masked with 0xf0 and then
> shifted 8 places right so that always ends up as a zero result. I
> believe the intended shift was 4 bits to the right. Fix this.
>
> [Note: not tested, I don't have the H/W]
>
> Addresses-Coverity: ("Operands don't affect result")
> Fixes: 5b435de0d786 ("net: wireless: add brcm80211 drivers")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Can someone ack this?

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