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

[Tal Shorer]

On Tue, Jun 13, 2017 at 12:19 PM, Greg KH <gre...@linuxfoundation.org> wrote:
> 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.sho...@gmail.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?
On an acm ttyGS* fd, yes.
>
> confused at the different levels here, sorry.
>
> greg k-h