On Tue, 12 Feb 2019, Peter Chen wrote:
> The calculation of packet number within microframe is different between
> high-speed and super-speed endpoint, we add support for super-speed
> in this patch.
>
> Cc: Pawel Laszczak <pawell@xxxxxxxxxxx>
> Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
> ---
> drivers/usb/misc/usbtest.c | 28 ++++++++++++++++++++++++----
> 1 file changed, 24 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
> index c7f82310e73e..98ada1a3425c 100644
> --- a/drivers/usb/misc/usbtest.c
> +++ b/drivers/usb/misc/usbtest.c
> @@ -347,6 +347,14 @@ static unsigned get_maxpacket(struct usb_device *udev, int pipe)
> return le16_to_cpup(&ep->desc.wMaxPacketSize);
> }
>
> +static int ss_isoc_get_packet_num(struct usb_device *udev, int pipe)
> +{
> + struct usb_host_endpoint *ep = usb_pipe_endpoint(udev, pipe);
> +
> + return USB_SS_MULT(ep->ss_ep_comp.bmAttributes)
> + * (1 + ep->ss_ep_comp.bMaxBurst);
> +}
Could this calculation be useful for other drivers? Should it go into
ch9.h or some other similar place?
Alan Stern
