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Date:   Sat, 20 Apr 2019 21:51:03 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Madhumitha Prabakaran <madhumithabiw@...il.com>
Cc:     eric@...olt.net, stefan.wahren@...e.com, f.fainelli@...il.com,
        rjui@...adcom.com, sbranden@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Staging: vc04_services: Cleanup in ctrl_set_bitrate()

On Sat, Apr 20, 2019 at 11:56:44AM -0500, Madhumitha Prabakaran wrote:
> Remove unnecessary variable and replace return type.
> In addition to that align the function parameters with parentheses to
> maintain Linux coding style.
> 
> Issue suggested by Coccinelle.
> 
> Signed-off-by: Madhumitha Prabakaran <madhumithabiw@...il.com>
> 
> ---
> Changes in v2
> 
> 1) Fix my own error of removing function call from the variable.
> 2) Align the function parameters with parentheses.
> 
> ---
> ---
>  .../staging/vc04_services/bcm2835-camera/controls.c    | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/staging/vc04_services/bcm2835-camera/controls.c b/drivers/staging/vc04_services/bcm2835-camera/controls.c
> index e39ab5fae724..71eb349c3138 100644
> --- a/drivers/staging/vc04_services/bcm2835-camera/controls.c
> +++ b/drivers/staging/vc04_services/bcm2835-camera/controls.c
> @@ -607,18 +607,16 @@ static int ctrl_set_bitrate(struct bm2835_mmal_dev *dev,
>  			    struct v4l2_ctrl *ctrl,
>  			    const struct bm2835_mmal_v4l2_ctrl *mmal_ctrl)
>  {
> -	int ret;
>  	struct vchiq_mmal_port *encoder_out;
>  
>  	dev->capture.encode_bitrate = ctrl->val;
>  
>  	encoder_out = &dev->component[MMAL_COMPONENT_VIDEO_ENCODE]->output[0];
>  
> -	ret = vchiq_mmal_port_parameter_set(dev->instance, encoder_out,
> -					    mmal_ctrl->mmal_id,
> -					    &ctrl->val, sizeof(ctrl->val));
> -	ret = 0;
> -	return ret;
> +	vchiq_mmal_port_parameter_set(dev->instance, encoder_out,
> +				      mmal_ctrl->mmal_id, &ctrl->val,
> +				      sizeof(ctrl->val));
> +	return 0;
>  }

Why does this function even return anything at all if it can not fail?

Why not return the value that vchiq_mmal_port_parameter_set() returned?

thanks,

greg k-h

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