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

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Message-ID: <78ad5b527aa1da06569fd5ae422ea2a403ef40a0.camel@perches.com>
Date:   Sun, 18 Apr 2021 00:58:40 -0700
From:   Joe Perches <joe@...ches.com>
To:     Kalle Valo <kvalo@...eaurora.org>,
        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

On Sun, 2021-04-18 at 06:10 +0000, Kalle Valo wrote:
> Colin King <colin.king@...onical.com> wrote:
> 
> > 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>
> 
> I think this needs review from someone familiar with the hardware.
> 
> Patch set to Changes Requested.

What "change" are you requesting here?

Likely there needs to be some other setting for the patch.

Perhaps "deferred" as you seem to be requesting a review
and there's no actual change necessary, just approval from
someone with the hardware and that someone test the patch.