usb: clamp bInterval to allowed range

[karo-tx-linux.git] / include / linux / usb.h

diff --git a/include/linux/usb.h b/include/linux/usb.h
index e99b2a114af4589612aa568e4b39a57201eabfaf..eb4252a0da7ec593e35e781cd80176d33a1e444d 100644 (file)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1547,10 +1547,16 @@ static inline void usb_fill_int_urb(struct urb *urb,
        urb->transfer_buffer_length = buffer_length;
        urb->complete = complete_fn;
        urb->context = context;
-       if (dev->speed == USB_SPEED_HIGH || dev->speed == USB_SPEED_SUPER)
+
+       if (dev->speed == USB_SPEED_HIGH || dev->speed == USB_SPEED_SUPER) {
+               /* make sure interval is within allowed range */
+               interval = clamp(interval, 1, 16);
+
                urb->interval = 1 << (interval - 1);
-       else
+       } else {
                urb->interval = interval;
+       }
+
        urb->start_frame = -1;
 }