linux-kernel - Re: [PATCH] net: wireless: rtlwifi: rtl8723be: hw.c: Cleaning up if statement that always evaluates to false

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Message-ID: <alpine.DEB.2.02.1406081333550.19183@chino.kir.corp.google.com>
Date:	Sun, 8 Jun 2014 13:35:15 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
cc:	Larry Finger <Larry.Finger@...inger.net>,
	Chaoming Li <chaoming_li@...lsil.com.cn>,
	"John W. Linville" <linville@...driver.com>,
	Joe Perches <joe@...ches.com>, Peter Wu <lekensteyn@...il.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: wireless: rtlwifi: rtl8723be: hw.c:  Cleaning up
 if statement that always evaluates to false

On Sun, 8 Jun 2014, Rickard Strandqvist wrote:

> I find a logical error in an if statement '(X & 0xfc) == 0x3' is always false
> 

Where is the 0xfc that your converting?

> After pointing this out, Larry Finger informed what would be the correct one.
> '(X & 0x3) == 0x3'
> 

This is already what it is, just say that you're replacing it with the 
constant.

> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
> ---
>  drivers/net/wireless/rtlwifi/rtl8723be/hw.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/rtlwifi/rtl8723be/hw.c b/drivers/net/wireless/rtlwifi/rtl8723be/hw.c
> index 0fdf090..b61044f 100644
> --- a/drivers/net/wireless/rtlwifi/rtl8723be/hw.c
> +++ b/drivers/net/wireless/rtlwifi/rtl8723be/hw.c
> @@ -1197,7 +1197,7 @@ static int _rtl8723be_set_media_status(struct ieee80211_hw *hw,
>  	}
>  	rtl_write_byte(rtlpriv, (MSR), bt_msr);
>  	rtlpriv->cfg->ops->led_control(hw, ledaction);
> -	if ((bt_msr & 0x03) == MSR_AP)
> +	if ((bt_msr & MSR_AP) == MSR_AP)
>  		rtl_write_byte(rtlpriv, REG_BCNTCFG + 1, 0x00);
>  	else
>  		rtl_write_byte(rtlpriv, REG_BCNTCFG + 1, 0x66);
--
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