Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760103Ab3EXIq6 (ORCPT ); Fri, 24 May 2013 04:46:58 -0400 Received: from mail-ee0-f47.google.com ([74.125.83.47]:37025 "EHLO mail-ee0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755059Ab3EXIq4 (ORCPT ); Fri, 24 May 2013 04:46:56 -0400 From: Federico Manzan To: gregkh@linuxfoundation.org Cc: sarah.a.sharp@linux.intel.com, stern@rowland.harvard.edu, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Federico Manzan Subject: [PATCH] usbfs: Increase arbitrary limit for USB 3 isopkt length Date: Fri, 24 May 2013 10:47:29 +0200 Message-Id: <1369385249-15624-1-git-send-email-f.manzan@gmail.com> X-Mailer: git-send-email 1.7.10.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1422 Lines: 39 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 Signed-off-by: Federico Manzan --- drivers/usb/core/devio.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index caefc80..7ac137e 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1287,9 +1287,11 @@ 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 > 65536) { ret = -EINVAL; goto error; } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/