Message-ID: <566d0435-d34d-6d1d-0951-be59b9c247b6@broadcom.com>
Date:   Wed, 8 Dec 2021 14:37:28 +0100
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Subject: Re: [PATCH] brcmfmac: Fix incorrect type assignments for keep-alive
To:     Loic Poulain <loic.poulain@linaro.org>, kvalo@kernel.org
Cc:     linux-wireless@vger.kernel.org
References: <1638953708-29192-1-git-send-email-loic.poulain@linaro.org>
From:   Arend van Spriel <arend.vanspriel@broadcom.com>
In-Reply-To: <1638953708-29192-1-git-send-email-loic.poulain@linaro.org>
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On 12/8/2021 9:55 AM, Loic Poulain wrote:
> cpu_to_le16 has been used for all keep-alive fields, but 'perdio_msec'
> is a 32-bit field and 'keep_alive_id' a 8-bit one. Fix that.
> 
> Fixes: 7a6cfe28ae3e ("brcmfmac:  Configure keep-alive packet on suspend")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
> ---
>   drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> index 1679361..ba52318 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> @@ -3908,9 +3908,9 @@ static int brcmf_keepalive_start(struct brcmf_if *ifp, unsigned int interval)

missed it in original patch, but prefer u32 typed.

>   
>   	/* Configure Null function/data keepalive */
>   	kalive.version = cpu_to_le16(1);
> -	kalive.period_msec = cpu_to_le16(interval * MSEC_PER_SEC);
> +	kalive.period_msec = cpu_to_le32(interval * MSEC_PER_SEC);

should we check whether multiplication (interval * MSEC_PER_SEC) does 
not overflow 32 bits? The only caller now uses 30 as interval so that is 
fine.

Regards,
Arend

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