Hi Ricardo,
Thank you for the patch.
On Tue, Dec 15, 2020 at 04:44:32PM +0100, Ricardo Ribalda wrote:
> Increase the size of the id, to avoid collisions with external entities.
Could you expand the commit message a bit to explain what external
entities are ?
> Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
> ---
> drivers/media/usb/uvc/uvc_driver.c | 2 +-
> drivers/media/usb/uvc/uvcvideo.h | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index 4cdd65d252d9..9f4451a2e0a6 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -1024,7 +1024,7 @@ static const u8 uvc_media_transport_input_guid[16] =
> UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT;
> static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING;
>
> -static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
> +static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
> unsigned int num_pads, unsigned int extra_size)
> {
> struct uvc_entity *entity;
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index df7bf2d104a3..00f985001c1d 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -301,7 +301,7 @@ struct uvc_entity {
> * chain. */
> unsigned int flags;
>
> - u8 id;
> + u16 id; /* 0-255: usb entity. 256-65535: external entities */
How about
/*
* Entities exposed by the UVC device use IDs 0-255, extra entities
* implemented by the driver (such as the GPIO entity) use IDs 256 and
* up.
*/
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> u16 type;
> char name[64];
> u8 guid[16];
--
Regards,
Laurent Pinchart
