media: usb: uvc: make use of new usb_endpoint_maxp_mult()

We have introduced a helper to calculate multiplier
value from wMaxPacketSize. Start using it.

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: <linux-media@vger.kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index b5589d5..11e0e5f 100644 (file)
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -1467,6 +1467,7 @@ static unsigned int uvc_endpoint_max_bpi(struct usb_device *dev,
                                         struct usb_host_endpoint *ep)
 {
        u16 psize;
+       u16 mult;
 
        switch (dev->speed) {
        case USB_SPEED_SUPER:
@@ -1474,7 +1475,8 @@ static unsigned int uvc_endpoint_max_bpi(struct usb_device *dev,
                return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval);
        case USB_SPEED_HIGH:
                psize = usb_endpoint_maxp(&ep->desc);
-               return (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
+               mult = usb_endpoint_maxp_mult(&ep->desc);
+               return (psize & 0x07ff) * mult;
        case USB_SPEED_WIRELESS:
                psize = usb_endpoint_maxp(&ep->desc);
                return psize;