linux-kernel - Re: [PATCH] brcmsmac: Remove always false 'channel

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Message-ID: <46dfe877-4f32-b763-429f-7af3a83828f0@cogentembedded.com>
Date:   Wed, 27 Nov 2019 13:48:19 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Austin Kim <austindh.kim@...il.com>, arend.vanspriel@...adcom.com,
        franky.lin@...adcom.com, hante.meuleman@...adcom.com,
        chi-hsien.lin@...ress.com, wright.feng@...ress.com,
        kvalo@...eaurora.org, davem@...emloft.net
Cc:     linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        brcm80211-dev-list@...ress.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] brcmsmac: Remove always false 'channel < 0' statement

On 27.11.2019 8:43, Austin Kim wrote:

> As 'channel' is declared as u16, the following statement is always false.
>     channel < 0
> 
> So we can remove unnecessary 'always false' statement.

    It's an expression, not a statement.

> Signed-off-by: Austin Kim <austindh.kim@...il.com>
> ---
>   drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c
> index 3f09d89..7f2c15c 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/main.c
> @@ -5408,7 +5408,7 @@ int brcms_c_set_channel(struct brcms_c_info *wlc, u16 channel)
>   {
>   	u16 chspec = ch20mhz_chspec(channel);
>   
> -	if (channel < 0 || channel > MAXCHANNEL)
> +	if (channel > MAXCHANNEL)
>   		return -EINVAL;
>   
>   	if (!brcms_c_valid_chanspec_db(wlc->cmi, chspec))

MBR, Sergei