[PATCH] USB: Allow high-bandwidth isochronous packets via usbfs

This patch increases an arbitrary limit on the size of
individual isochronous packets submitted via usbfs. The
limit is still arbitrary, but it's now large enough to
support the maximum packet size used by high-bandwidth
isochronous transfers.

Signed-off-by: Micah Dowty <micah@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 04f7504..b04ede7 100644 (file)
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -982,7 +982,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
                        return -EFAULT;
                }
                for (totlen = u = 0; u < uurb->number_of_packets; u++) {
-                       if (isopkt[u].length > 1023) {
+                       /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */
+                       if (isopkt[u].length > 8192) {
                                kfree(isopkt);
                                return -EINVAL;
                        }