netdev - Re: [PATCH] net: wireless: ath: use div64_u64() instead of do

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Message-ID: <87v8xnrzpj.fsf@kernel.org>
Date:   Thu, 10 Feb 2022 08:40:56 +0200
From:   Kalle Valo <kvalo@...nel.org>
To:     Qing Wang <wangqing@...o.com>
Cc:     Maya Erez <merez@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wireless@...r.kernel.org, wil6210@....qualcomm.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: wireless: ath: use div64_u64() instead of do_div()

Qing Wang <wangqing@...o.com> writes:

> From: Wang Qing <wangqing@...o.com>
>
> do_div() does a 64-by-32 division.
> When the divisor is u64, do_div() truncates it to 32 bits, this means it
> can test non-zero and be truncated to zero for division.
>
> fix do_div.cocci warning:
> do_div() does a 64-by-32 division, please consider using div64_u64 instead.
>
> Signed-off-by: Wang Qing <wangqing@...o.com>
> ---
>  drivers/net/wireless/ath/wil6210/debugfs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

The subject prefix should be "wil6210:", but I can fix that.

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