From: Federico Manzan Date: Fri, 24 May 2013 16:18:48 +0000 (+0200) Subject: usbfs: Increase arbitrary limit for USB 3 isopkt length X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=e2e2f0ea1c935edcf53feb4c4c8fdb4f86d57dd9;p=linux-edison.git usbfs: Increase arbitrary limit for USB 3 isopkt length Increase the current arbitrary limit for isocronous packet size to a value large enough to account for USB 3.0 super bandwidth streams, bMaxBurst (0~15 allowed, 1~16 packets) bmAttributes (bit 1:0, mult 0~2, 1~3 packets) so the size max for one USB 3 isocronous transfer is 1024 byte * 16 * 3 = 49152 byte Acked-by: Alan Stern Signed-off-by: Federico Manzan Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index caefc800f29..c88c4fb9459 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1287,9 +1287,13 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, goto error; } for (totlen = u = 0; u < uurb->number_of_packets; u++) { - /* arbitrary limit, - * sufficient for USB 2.0 high-bandwidth iso */ - if (isopkt[u].length > 8192) { + /* + * arbitrary limit need for USB 3.0 + * bMaxBurst (0~15 allowed, 1~16 packets) + * bmAttributes (bit 1:0, mult 0~2, 1~3 packets) + * sizemax: 1024 * 16 * 3 = 49152 + */ + if (isopkt[u].length > 49152) { ret = -EINVAL; goto error; }