From owner-freebsd-bugs  Tue Apr  2 18:40: 8 2002
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP id C6EEF37B41A
	for <freebsd-bugs@hub.freebsd.org>; Tue,  2 Apr 2002 18:40:01 -0800 (PST)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.11.6/8.11.6) id g332e1Y95639;
	Tue, 2 Apr 2002 18:40:01 -0800 (PST)
	(envelope-from gnats)
Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP id 0B24037B416
	for <freebsd-gnats-submit@FreeBSD.org>; Tue,  2 Apr 2002 18:33:36 -0800 (PST)
Received: (from nobody@localhost)
	by freefall.freebsd.org (8.11.6/8.11.6) id g332XZ394590;
	Tue, 2 Apr 2002 18:33:35 -0800 (PST)
	(envelope-from nobody)
Message-Id: <200204030233.g332XZ394590@freefall.freebsd.org>
Date: Tue, 2 Apr 2002 18:33:35 -0800 (PST)
From: Yuri Victorovich <yuri@tsoft.com>
To: freebsd-gnats-submit@FreeBSD.org
X-Send-Pr-Version: www-1.0
Subject: kern/36682: USB isochroneous transfer doesn't report back lengths of short transfers
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-bugs.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-bugs>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-bugs>
X-Loop: FreeBSD.org


>Number:         36682
>Category:       kern
>Synopsis:       USB isochroneous transfer doesn't report back lengths of short transfers
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Tue Apr 02 18:40:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Yuri Victorovich
>Release:        STABLE 4.5
>Organization:
Optima Inc
>Environment:
FreeBSD mach1.xxx.com 4.5-STABLE FreeBSD 4.5-STABLE #8: Tue Apr  2 18:48:53 EST 2002     root@sunflower.syrec.org:/usr/src/sys/compile/GENERIC  i386

>Description:
When isochroneous read transfer is submitted with a lot of segments
there are some devices that don't fill the buffers completely and
return short transfer. Driver issuing transfer should always be
interested in actual length of each individual buffer read. Currently
system lacks this capability.

>How-To-Repeat:
N/A
>Fix:
*** uhci.c      Tue Apr  2 18:43:59 2002
--- uhci.c      Tue Apr  2 18:45:02 2002
***************
*** 1104,1109 ****
--- 1104,1110 ----
                                n = 0;
                        status = LE(std->td.td_status);
                        actlen += UHCI_TD_GET_ACTLEN(status);
+                       xfer->frlengths[i] = UHCI_TD_GET_ACTLEN(status);
                }
                upipe->u.iso.inuse -= nframes;
                xfer->actlen = actlen;

>Release-Note:
>Audit-Trail:
>Unformatted:

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message