From owner-freebsd-usb@FreeBSD.ORG Mon Nov 29 04:54:33 2004 Return-Path: Delivered-To: freebsd-usb@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1BBB216A4CF for ; Mon, 29 Nov 2004 04:54:33 +0000 (GMT) Received: from pimout1-ext.prodigy.net (pimout1-ext.prodigy.net [207.115.63.77]) by mx1.FreeBSD.org (Postfix) with ESMTP id B80F943D49 for ; Mon, 29 Nov 2004 04:54:32 +0000 (GMT) (envelope-from julian@elischer.org) Received: from [192.168.1.102] (adsl-68-123-122-146.dsl.snfc21.pacbell.net [68.123.122.146])iAT4sV6M188052 for ; Sun, 28 Nov 2004 23:54:31 -0500 Message-ID: <41AAAB86.80300@elischer.org> Date: Sun, 28 Nov 2004 20:54:30 -0800 From: Julian Elischer User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.8a3) Gecko/20041017 X-Accept-Language: en, hu MIME-Version: 1.0 To: usb@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: working on EHCI bug in 4.x X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Nov 2004 04:54:33 -0000 general report to the list.. I'm working on a bug that is hitting my employer in FBSD4.10 and may (not sure yet) also exist in 5.x/6. (Need to get a 5.x test machine with EHCI). The symptom is that an IO timeout removes the 'xfer' from the interface but fails to handshake with the hardware correctly, resulting in the hardware DMA-ing to the buffer which has been added back to the free list. The code in question is the same in 4/5/6 so it may be that it is everywhere.. I now undersand the EHCI interface enough to say it is not an OBVIOUS bug as teh code SEEMS to be doing the handshake correctly. *sigh* anyhow.. back to your regularly scheduled hacking.. Anyone with ideas should feel free to speak up :-)