USB: set the correct interval for interrupt URBs

This patch (as862) fixes a couple of bugs in the way usbcore handles
intervals for interrupt URBs.  usb_interrupt_msg (and usb_bulk_msg for
backward compatibility) don't set the interval correctly for
high-speed devices.  proc_do_submiturb() doesn't set it correctly when
a bulk URB is submitted to an interrupt endpoint.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 2f17468b5c1..217a3d6d0a0 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -221,10 +221,15 @@ int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe,
 
         if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
                         USB_ENDPOINT_XFER_INT) {
+                int interval;
+
+                if (usb_dev->speed == USB_SPEED_HIGH)
+                        interval = 1 << min(15, ep->desc.bInterval - 1);
+                else
+                        interval = ep->desc.bInterval;
                 pipe = (pipe & ~(3 << 30)) | (PIPE_INTERRUPT << 30);
                 usb_fill_int_urb(urb, usb_dev, pipe, data, len,
-                                usb_api_blocking_completion, NULL,
-                                ep->desc.bInterval);
+                                usb_api_blocking_completion, NULL, interval);
         } else
                 usb_fill_bulk_urb(urb, usb_dev, pipe, data, len,
                                 usb_api_blocking_completion, NULL);