Re: [REVIEW PATCH 8/9] f_uvc: use v4l2_dev instead of the deprecated parent field.

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Hans,

Thanks for the patch.

On Monday 10 June 2013 14:48:37 Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
> 
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
>  drivers/usb/gadget/f_uvc.c |    8 +++++++-
>  drivers/usb/gadget/uvc.h   |    2 ++
>  2 files changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/f_uvc.c b/drivers/usb/gadget/f_uvc.c
> index 38dcedd..762e82f 100644
> --- a/drivers/usb/gadget/f_uvc.c
> +++ b/drivers/usb/gadget/f_uvc.c
> @@ -413,7 +413,7 @@ uvc_register_video(struct uvc_device *uvc)
>  	if (video == NULL)
>  		return -ENOMEM;
> 
> -	video->parent = &cdev->gadget->dev;
> +	video->v4l2_dev = &uvc->v4l2_dev;
>  	video->fops = &uvc_v4l2_fops;
>  	video->release = video_device_release;
>  	strlcpy(video->name, cdev->gadget->name, sizeof(video->name));
> @@ -570,6 +570,7 @@ uvc_function_unbind(struct usb_configuration *c, struct
> usb_function *f) INFO(cdev, "uvc_function_unbind\n");
> 
>  	video_unregister_device(uvc->vdev);
> +	v4l2_device_unregister(&uvc->v4l2_dev);
>  	uvc->control_ep->driver_data = NULL;
>  	uvc->video.ep->driver_data = NULL;
> 
> @@ -697,6 +698,11 @@ uvc_function_bind(struct usb_configuration *c, struct
> usb_function *f) if ((ret = usb_function_deactivate(f)) < 0)
>  		goto error;
> 
> +	if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) {
> +		printk(KERN_INFO "v4l2_device_register failed\n");
> +		goto error;
> +	}
> +
>  	/* Initialise video. */
>  	ret = uvc_video_init(&uvc->video);
>  	if (ret < 0)

Shouldn't you add the corresponding cleanup code in the error path at the end 
of the function ?

> diff --git a/drivers/usb/gadget/uvc.h b/drivers/usb/gadget/uvc.h
> index 817e9e1..7a9111d 100644
> --- a/drivers/usb/gadget/uvc.h
> +++ b/drivers/usb/gadget/uvc.h
> @@ -57,6 +57,7 @@ struct uvc_event
>  #include <linux/videodev2.h>
>  #include <linux/version.h>
>  #include <media/v4l2-fh.h>
> +#include <media/v4l2-device.h>
> 
>  #include "uvc_queue.h"
> 
> @@ -145,6 +146,7 @@ enum uvc_state
>  struct uvc_device
>  {
>  	struct video_device *vdev;
> +	struct v4l2_device v4l2_dev;
>  	enum uvc_state state;
>  	struct usb_function func;
>  	struct uvc_video video;
-- 
Regards,

Laurent Pinchart