linux-kernel - Re: [PATCH v2 2/2] media: uvcvideo: Do not alloc dev->status

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Message-ID: <Y5kbXt5lUqUiCmCi@google.com>
Date:   Wed, 14 Dec 2022 09:39:58 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     Max Staudt <mstaudt@...gle.com>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Yunke Cao <yunkec@...omium.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, stable@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] media: uvcvideo: Do not alloc dev->status

On (22/12/13 15:35), Ricardo Ribalda wrote:
[..]
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -559,7 +559,7 @@ struct uvc_device {
>  	/* Status Interrupt Endpoint */
>  	struct usb_host_endpoint *int_ep;
>  	struct urb *int_urb;
> -	u8 *status;
> +	u8 status[UVC_MAX_STATUS_SIZE];

Can we use `struct uvc_control_status status;` instead of open-coding it?
Seems that this is what the code wants anyway:

	struct uvc_control_status *status =
				(struct uvc_control_status *)dev->status;

And then we can drop casts in uvc_status_complete().