linux-kernel - Re: [PATCH 2/3] media: atomisp-gc2235: drop an unused var

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Date:   Fri, 12 Nov 2021 13:46:23 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Beatriz Martins de Carvalho 
        <martinsdecarvalhobeatriz@...il.com>,
        Deepak R Varma <drv@...lo.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Tom Rix <trix@...hat.com>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, llvm@...ts.linux.dev
Subject: Re: [PATCH 2/3] media: atomisp-gc2235: drop an unused var

On Thu, Nov 11, 2021 at 11:08:52PM +0000, Mauro Carvalho Chehab wrote:
> Fix this clang Werror with W=1:
> 
> drivers/staging/media/atomisp/i2c/atomisp-gc2235.c:573:6: error: variable 'ret' set but not used [-Werror,-Wunused-but-set-variable]
>         int ret = -1;
>             ^
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
> 
> To mailbombing on a large number of people, only mailing lists were C/C on the cover.
> See [PATCH 0/3] at: https://lore.kernel.org/all/cover.1636672052.git.mchehab+huawei@kernel.org/
> 
>  drivers/staging/media/atomisp/i2c/atomisp-gc2235.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c b/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
> index 5e7085264189..0e6b2e6100d1 100644
> --- a/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
> +++ b/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
> @@ -570,14 +570,16 @@ static int power_ctrl(struct v4l2_subdev *sd, bool flag)
>  static int gpio_ctrl(struct v4l2_subdev *sd, bool flag)
>  {
>  	struct gc2235_device *dev = to_gc2235_sensor(sd);
> -	int ret = -1;
> +	int ret;
>  
>  	if (!dev || !dev->platform_data)
>  		return -ENODEV;
>  
> -	ret |= dev->platform_data->gpio1_ctrl(sd, !flag);
> +	ret = dev->platform_data->gpio1_ctrl(sd, !flag);
>  	usleep_range(60, 90);
> -	return dev->platform_data->gpio0_ctrl(sd, flag);
> +	ret |= dev->platform_data->gpio0_ctrl(sd, flag);
> +
> +	return ret;
>  }
>  
>  static int power_up(struct v4l2_subdev *sd)
> -- 
> 2.33.1
> 
>