linux-kernel - Re: [PATCH] staging: xgifb: XGI_main_26: Change variables that is never used

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Date:	Thu, 29 Jan 2015 00:43:17 +0200
From:	Aaro Koskinen <aaro.koskinen@....fi>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc:	Arnaud Patard <arnaud.patard@...-net.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Vitor Braga <vitorpybraga@...il.com>,
	Monam Agarwal <monamagarwal123@...il.com>,
	Lubomir Rintel <lkundrak@...sk>,
	Thomas Gummerer <t.gummerer@...il.com>,
	Brian Vandre <bvandre@...il.com>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: xgifb: XGI_main_26: Change variables that is
 never used

Hi,

On Wed, Jan 28, 2015 at 10:38:07PM +0100, Rickard Strandqvist wrote:
> Variable ar assigned a value that is never used.
> Instead use the struct variable of the same name.
> 
> This was found using a static code analysis program called cppcheck
> 
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
> ---
>  drivers/staging/xgifb/XGI_main_26.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/xgifb/XGI_main_26.c b/drivers/staging/xgifb/XGI_main_26.c
> index 709d49e..ecfdf34 100644
> --- a/drivers/staging/xgifb/XGI_main_26.c
> +++ b/drivers/staging/xgifb/XGI_main_26.c
> @@ -1233,7 +1233,7 @@ static int XGIfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
>  	unsigned int vtotal = 0;
>  	unsigned int drate = 0, hrate = 0;
>  	int found_mode = 0;
> -	int refresh_rate, search_idx;
> +	int search_idx;
>  
>  	if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_NONINTERLACED) {
>  		vtotal = var->upper_margin + var->yres + var->lower_margin
> @@ -1271,7 +1271,7 @@ static int XGIfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
>  
>  	/* Calculation wrong for 1024x600 - force it to 60Hz */
>  	if ((var->xres == 1024) && (var->yres == 600))
> -		refresh_rate = 60;
> +		xgifb_info->refresh_rate = 60;

You are changing behaviour here. Did you test it, is it fixing something?
Otherwise you could just delete the whole if block...

A.
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