From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: sata_mv: trial fix for lost NCQ interrupts Date: Wed, 14 Jan 2009 17:08:25 -0500 Message-ID: <496E6259.3000502@rtr.ca> References: <496D04EB.3060803@rtr.ca> <496E53DD.6040408@gmail.com> <496E589E.7090909@garzik.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from rtr.ca ([76.10.145.34]:41374 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754045AbZANWI1 (ORCPT ); Wed, 14 Jan 2009 17:08:27 -0500 In-Reply-To: <496E589E.7090909@garzik.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jeff Garzik Cc: Harri Olin , IDE/ATA development list , Brian Rademacher , Eamonn Hamilton Jeff Garzik wrote: > Harri Olin wrote: >> I still see timeouts only on 4 lower ports where disk has also been >> connected to port +4. i.e. if port 7 is empty, port 3 will work just >> fine. I just would like to see some confirmation that others are >> seeing this same kind of behavior. > > > hmmmm, that is quite interesting. That seems to indicate something > related to the dual-HC mechanism (8-port cards are really two 4-port > chips internally)... .. Yup. As I just noted on the redhat bugzilla entry, this bug only bites when drives are attached to *both* the lower and upper halves of the chip. The second patch fixes that problem. Once we hear back again from some affected users, I'll reissue it for upstream/backstream. Thanks