From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761237AbYBLICS (ORCPT ); Tue, 12 Feb 2008 03:02:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753715AbYBLICE (ORCPT ); Tue, 12 Feb 2008 03:02:04 -0500 Received: from einhorn.in-berlin.de ([192.109.42.8]:43047 "EHLO einhorn.in-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753083AbYBLICD (ORCPT ); Tue, 12 Feb 2008 03:02:03 -0500 X-Envelope-From: stefanr@s5r6.in-berlin.de Message-ID: <47B15257.80200@s5r6.in-berlin.de> Date: Tue, 12 Feb 2008 09:01:27 +0100 From: Stefan Richter User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.11) Gecko/20071216 SeaMonkey/1.1.7 MIME-Version: 1.0 To: Jarod Wilson CC: Stefan Richter , linux1394-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: [PATCH 9/9] firewire: fw-sbp2: fix I/O errors during reconnect References: <47B08F6B.2020502@redhat.com> <47B0AE54.8090602@s5r6.in-berlin.de> <47B1298D.2000600@redhat.com> In-Reply-To: <47B1298D.2000600@redhat.com> X-Enigmail-Version: 0.95.3 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Jarod Wilson wrote: > Stefan Richter wrote: >> "perceived" unplugs can happen if a third node is slowly plugged in or out [...] > I wonder if there's any sort of > guidance on this sort of thing in the firewire specs... I am not aware of any. The hardware related parts of the 1394a PHY layer spec have AFAIR enhancements over 1394-1995 to avoid bursts of bus reset events when connectors scrape into or out of the ports. But what I saw on a few occasions now were proper self ID complete events, not merely bus reset events. (The firewire stack only cares for self ID complete, therefore multiple bus reset events before one self ID complete event aren't a problem in the first place. I don't know though whether these bursts of bus resets which 1394a addressed had self ID complete events in them or not.) -- Stefan Richter -=====-==--- --=- -==-- http://arcgraph.de/sr/