USB: avoid left shift by -1

[pandora-kernel.git] / drivers / usb / core / devio.c

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index ed11901..45d3007 100644 (file)
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1281,11 +1281,17 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
        as->urb->setup_packet = (unsigned char *)dr;
        as->urb->start_frame = uurb->start_frame;
        as->urb->number_of_packets = uurb->number_of_packets;
-       if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
-                       ps->dev->speed == USB_SPEED_HIGH)
-               as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
-       else
-               as->urb->interval = ep->desc.bInterval;
+
+       if (ep->desc.bInterval) {
+               if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
+                               ps->dev->speed == USB_SPEED_HIGH ||
+                               ps->dev->speed >= USB_SPEED_SUPER)
+                       as->urb->interval = 1 <<
+                                       min(15, ep->desc.bInterval - 1);
+               else
+                       as->urb->interval = ep->desc.bInterval;
+       }
+
        as->urb->context = as;
        as->urb->complete = async_completed;
        for (totlen = u = 0; u < uurb->number_of_packets; u++) {