From mboxrd@z Thu Jan 1 00:00:00 1970 From: Barto Subject: Re: BUG in scsi_lib.c due to a bad commit Date: Mon, 24 Nov 2014 16:12:42 +0100 Message-ID: <54734AEA.7010102@laposte.net> References: <20141120060933.GA21432@infradead.org> <546E2880.5070303@laposte.net> <20141120175316.GA19590@infradead.org> <546E32A5.4040202@laposte.net> <20141124091835.GA21579@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from smtp1.tech.numericable.fr ([82.216.111.37]:33530 "EHLO smtp1.tech.numericable.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750733AbaKXPNW (ORCPT ); Mon, 24 Nov 2014 10:13:22 -0500 In-Reply-To: <20141124091835.GA21579@infradead.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Christoph Hellwig Cc: "Elliott, Robert (Server Storage)" , Guenter Roeck , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org Hello Christoph, to be clear : my JMicron pcie card JMB363/368 has 2 sata ports and one IDE port, JMicron supports AHCI on these 2 sata ports, my gigabyte motherboard has 4 sata ports and one IDE port, my gigabyte motherboard doesn't support AHCI on these 4 sata ports ( my bios seems to treats sata devices like IDE devices, a kind of "IDE emulation mode"= ), the bug doesn't occur if the Sata DVD burner is not mixed with a hard disk on the Sata ports ( motherboard sata ports ), the configuration who triggers the bug is mixing a slow device ( sata dvd burner ) with a fast device ( sata harddisk ) on the sata ports of the motherboard ( who doesn't support AHCI ), the bug doesn't occur if the sata dvd burner is connected on a JMicron pcie card because there is no other sata harddisks connected on this JMicron, I connect only a IDE hardidsk on this JMicron pcie card and also this Sata dvd burner in order to avoid the bug ( it's a workaround= ), 2 pata_jmicron =3D the IDE port in this JMicron pcie card ( master and = slave ) 4 ata_piix =3D 4 sata ports from the gigabyte motherboard, this ports doesn't support AHCI 2 ahci =3D 2 sata ports in this JMicron pcie card but another user has the same problem but with an IDE DVD burner ( mixe= d with an IDE hardidsk ) : https://bugzilla.kernel.org/show_bug.cgi?id=3D87581#c18 this user has tested your patch and it solves the bug Le 24/11/2014 10:18, Christoph Hellwig a =E9crit : > On Thu, Nov 20, 2014 at 07:27:49PM +0100, Barto wrote: >> but the sata DVD burner is now connected on a Jmicron sata PCIe card= ( >> with this configuration the bug doesn't occur ), I don't know if thi= s >> change can modify the result of your command, >> >> here is the result of another command : >> >> $ for i in /sys/class/scsi_host/*; do cat $i/proc_name; done >> pata_jmicron >> pata_jmicron >> ata_piix >> ata_piix >> ata_piix >> ata_piix >> ahci >> ahci >=20 > Interesting. So the jmicron card also has a queue depth of just one, > but the error still occurs? I've added the linux-ide list, maybe > someone there has an idea how piix vs jmicron could have such differe= nt > behaviors for queueing or error handling. >=20 >=20