linux-kernel - Re: [PATCH] video: backlight: ili922x.c: Cleaning up variable that is never used

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Date:	Mon, 7 Jul 2014 11:50:58 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc:	Jingoo Han <jg1.han@...sung.com>, Bryan Wu <cooloney@...il.com>,
	Rickard Strandqvist <rickard.strandqvist@...ymobile.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] video: backlight: ili922x.c:  Cleaning up variable that
 is never used

On Sat, 05 Jul 2014, Rickard Strandqvist wrote:

> From: Rickard Strandqvist <rickard.strandqvist@...ymobile.com>
> 
> Variable ar assigned a value that is never used.
> I have also removed all the code that thereby serves no purpose.
> 
> This was found using a static code analysis program called cppcheck
> 
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
> ---
>  drivers/video/backlight/ili922x.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

Is this different from the patch I just applied?

> diff --git a/drivers/video/backlight/ili922x.c b/drivers/video/backlight/ili922x.c
> index ea67fe1..06936c8 100644
> --- a/drivers/video/backlight/ili922x.c
> +++ b/drivers/video/backlight/ili922x.c
> @@ -251,7 +251,7 @@ static int ili922x_write(struct spi_device *spi, u8 reg, u16 value)
>  	struct spi_transfer xfer_regindex, xfer_regvalue;
>  	unsigned char tbuf[CMD_BUFSIZE];
>  	unsigned char rbuf[CMD_BUFSIZE];
> -	int ret, len = 0;
> +	int ret;
>  
>  	memset(&xfer_regindex, 0, sizeof(struct spi_transfer));
>  	memset(&xfer_regvalue, 0, sizeof(struct spi_transfer));
> @@ -273,7 +273,6 @@ static int ili922x_write(struct spi_device *spi, u8 reg, u16 value)
>  	ret = spi_sync(spi, &msg);
>  
>  	spi_message_init(&msg);
> -	len = 0;
>  	tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_REG,
>  					 START_RW_WRITE));
>  	tbuf[1] = set_tx_byte((value & 0xFF00) >> 8);

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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