linux-kernel - Re: [PATCH] backlight: ili922x: remove redundant variable len

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Message-ID: <20171108104331.phpfymg2kslgwg3v@dell>
Date:   Wed, 8 Nov 2017 10:43:31 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Colin King <colin.king@...onical.com>
Cc:     Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] backlight: ili922x: remove redundant variable len

On Sun, 05 Nov 2017, Colin King wrote:

> From: Colin Ian King <colin.king@...onical.com>
> 
> The variable len is assigned but never read, therefore it is redundant
> and can be removed. Cleans up clang warning:
> 
> drivers/video/backlight/ili922x.c:276:2: warning: Value stored to 'len'
> is never read
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/video/backlight/ili922x.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

Applied, thanks.

> diff --git a/drivers/video/backlight/ili922x.c b/drivers/video/backlight/ili922x.c
> index a9e9cef..2b6c6aa 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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