Re: [PATCH] usb: gadget: uvc: default the ctrl request interface offsets

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Oct 10, 2022 at 08:20:28PM +0200, Michael Grzeschik wrote:
> For the userspace it is needed to distinguish between requests for the
> control or streaming interface. The userspace would have to parse the
> configfs to know which interface index it has to compare the ctrl
> requests against. Since the interface numbers are not fixed, e.g. for
> composite gadgets, the interface offset depends on the setup.
> 
> The kernel has this information when handing over the ctrl request to
> the userspace. This patch removes the offset from the interface numbers
> and expose the default interface defines in the uapi g_uvc.h.
> 
> Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
> ---
>  drivers/usb/gadget/function/f_uvc.c | 16 +++++++++++++---
>  include/uapi/linux/usb/g_uvc.h      |  3 +++
>  2 files changed, 16 insertions(+), 3 deletions(-)

This is a v2, what changed from v1?

thanks,

greg k-h