From owner-svn-src-all@FreeBSD.ORG  Wed Apr 24 16:22:54 2013
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id 291B2B9D;
 Wed, 24 Apr 2013 16:22:54 +0000 (UTC)
 (envelope-from hselasky@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org
 [IPv6:2001:1900:2254:2068::e6a:0])
 by mx1.freebsd.org (Postfix) with ESMTP id 1BD971EA1;
 Wed, 24 Apr 2013 16:22:54 +0000 (UTC)
Received: from svn.freebsd.org ([127.0.1.70])
 by svn.freebsd.org (8.14.6/8.14.6) with ESMTP id r3OGMrEx009989;
 Wed, 24 Apr 2013 16:22:53 GMT
 (envelope-from hselasky@svn.freebsd.org)
Received: (from hselasky@localhost)
 by svn.freebsd.org (8.14.6/8.14.5/Submit) id r3OGMr04009988;
 Wed, 24 Apr 2013 16:22:53 GMT
 (envelope-from hselasky@svn.freebsd.org)
Message-Id: <201304241622.r3OGMr04009988@svn.freebsd.org>
From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Wed, 24 Apr 2013 16:22:53 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r249844 - head/sys/dev/sound/usb
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
 user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 24 Apr 2013 16:22:54 -0000

Author: hselasky
Date: Wed Apr 24 16:22:53 2013
New Revision: 249844
URL: http://svnweb.freebsd.org/changeset/base/249844

Log:
  Fix the USB audio feedback endpoint algorithm. There should not
  be any need to bias the returned value.
  
  Reported by:	Craig Leres <leres@ee.lbl.gov>

Modified:
  head/sys/dev/sound/usb/uaudio.c

Modified: head/sys/dev/sound/usb/uaudio.c
==============================================================================
--- head/sys/dev/sound/usb/uaudio.c	Wed Apr 24 13:54:55 2013	(r249843)
+++ head/sys/dev/sound/usb/uaudio.c	Wed Apr 24 16:22:53 2013	(r249844)
@@ -1981,10 +1981,6 @@ uaudio_chan_play_sync_callback(struct us
 		while (temp > (sample_rate + (sample_rate / 2)))
 			temp /= 2;
 
-		/* bias */
-
-		temp += (sample_rate + 1999) / 2000;
-
 		/* compare */
 
 		DPRINTF("Comparing %d < %d\n",