linux-kernel - Re: [PATCH v4 2/3] usb: gadget: f_fs: add ioctl returning ep descriptor

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Message-ID: <53F48B94.9090002@cogentembedded.com>
Date:	Wed, 20 Aug 2014 15:50:44 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Robert Baldyga <r.baldyga@...sung.com>, balbi@...com
CC:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, mina86@...a86.com,
	m.szyprowski@...sung.com, andrzej.p@...sung.com,
	k.opasiak@...sung.com
Subject: Re: [PATCH v4 2/3] usb: gadget: f_fs: add ioctl returning ep descriptor

Hello.

On 8/20/2014 9:46 AM, Robert Baldyga wrote:

> This patch introduces ioctl named FUNCTIONFS_ENDPOINT_DESC, which
> returns endpoint descriptor to userspace. It works only if function
> is active.

> Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>

[...]

> diff --git a/include/uapi/linux/usb/functionfs.h b/include/uapi/linux/usb/functionfs.h
> index 0154b28..900896e 100644
> --- a/include/uapi/linux/usb/functionfs.h
> +++ b/include/uapi/linux/usb/functionfs.h
> @@ -265,6 +265,12 @@ struct usb_functionfs_event {
>    */
>   #define	FUNCTIONFS_ENDPOINT_REVMAP	_IO('g', 129)
>
> +/*
> + * Returns endpoint descriptor. In funciton is not active returns -ENODEV.

    s/funciton/function/.

WBR, Sergei

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