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

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Message-ID: <87pmyoj99v.fsf@codeaurora.org>
Date:   Wed, 21 Apr 2021 12:07:24 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Colin King <colin.king@...onical.com>,
        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

Joe Perches <joe@...ches.com> writes:

> 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?

Don't take patchwork states literally, a better name for this state
would be "Needs work" or something like that.

> 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.

I already asked for help on April 7th and nobody replied, so I'm
dropping this now. The patch can be resent if/when the change is
confirmed to be correct.

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