linux-kernel - Re: [PATCH v2 6/8] usb: gadget: f_acm: add an ioctl to get the current line coding

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Date:   Tue, 13 Jun 2017 11:19:13 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Tal Shorer <tal.shorer@...il.com>
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, balbi@...nel.org, corbet@....net
Subject: Re: [PATCH v2 6/8] usb: gadget: f_acm: add an ioctl to get the
 current line coding

On Tue, Jun 13, 2017 at 09:52:12AM +0300, Tal Shorer wrote:
> The user can issue USB_F_GET_LINE_CODING to get the current line coding
> as set by the host (or the default if unset yet).
> 
> Signed-off-by: Tal Shorer <tal.shorer@...il.com>
> ---
>  Documentation/ioctl/ioctl-number.txt |  1 +
>  drivers/usb/gadget/function/f_acm.c  | 19 +++++++++++++++++++
>  include/uapi/linux/usb/f_acm.h       | 12 ++++++++++++

Where is this ioctl being called?  On the tty device?  If so, which one?
The gadget driver's tty device node?  Or somewhere else?

confused at the different levels here, sorry.

greg k-h