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>
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 274f14f..36e7a84 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -912,7 +912,7 @@
struct async *as;
struct usb_ctrlrequest *dr = NULL;
unsigned int u, totlen, isofrmlen;
- int ret, interval = 0, ifnum = -1;
+ int ret, ifnum = -1;
if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
URB_NO_FSBR|URB_ZERO_PACKET))
@@ -992,7 +992,6 @@
if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
!= USB_ENDPOINT_XFER_ISOC)
return -EINVAL;
- interval = 1 << min (15, ep->desc.bInterval - 1);
isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
return -ENOMEM;
@@ -1021,10 +1020,6 @@
if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
!= USB_ENDPOINT_XFER_INT)
return -EINVAL;
- if (ps->dev->speed == USB_SPEED_HIGH)
- interval = 1 << min (15, ep->desc.bInterval - 1);
- else
- interval = ep->desc.bInterval;
if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
return -EINVAL;
if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
@@ -1053,7 +1048,11 @@
as->urb->setup_packet = (unsigned char*)dr;
as->urb->start_frame = uurb->start_frame;
as->urb->number_of_packets = uurb->number_of_packets;
- as->urb->interval = interval;
+ 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;
as->urb->context = as;
as->urb->complete = async_completed;
for (totlen = u = 0; u < uurb->number_of_packets; u++) {