From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Farnsworth Subject: VIA AHCI NCQ [was: Re: Recent AHCI drivers do not work with VIA VT8251 controllers (regression in 2.6.19 from 2.6.18)] Date: Wed, 31 Jan 2007 20:34:34 +0000 Message-ID: <200701312034.36499.simon@farnz.org.uk> References: <20070130155355.GB12475@reddwarf.farnz.org.uk> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1889014.kOgU2BCKBh"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail.farnz.org.uk ([81.187.250.194]:43032 "EHLO mail.farnz.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030579AbXAaVF2 (ORCPT ); Wed, 31 Jan 2007 16:05:28 -0500 Received: from lister.farnz.org.uk (lister.farnz.org.uk [IPv6:2001:8b0:104:2:204:61ff:fe42:f592]) by mail.farnz.org.uk (Postfix) with ESMTP id 23A8539581 for ; Wed, 31 Jan 2007 20:34:46 +0000 (GMT) In-Reply-To: <20070130155355.GB12475@reddwarf.farnz.org.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org --nextPart1889014.kOgU2BCKBh Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tuesday 30 January 2007 15:53, Simon Farnsworth wrote: > Hello, > > I've got a VIA VT8251 AHCI controller, driving two Maxtor SATA disks. > Under Linux 2.6.18.5, it works; using 2.6.19.1, it fails to work (bug > report at http://bugzilla.kernel.org/show_bug.cgi?id=3D7589 - note that > pci=3Dnomsi does not fix things for me, as I still get no interrupts). > I've been going through 2.6.20-rc releases this evening. 2.6.20-rc7 resolve= s=20 my AHCI fault (although not the MSI problem); it looks like Tejun Heo's fix= =20 to ahci_thaw() in a718728f9e40ec79c0879ec6509a54fee214f5b2 fixes things for= =20 my setup. Of course, I'm now curious as to why NCQ is disabled on VIA AHCI controller= s.=20 Is there a known hardware bug I should be wary of, or is it just a case of= =20 being cautious due to the other issues with the VT8251 (in which case I'll= =20 try enabling it and reporting back)? =2D-=20 Thanks for the code and the fix, Simon Farnsworth --nextPart1889014.kOgU2BCKBh Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.1 (GNU/Linux) iD8DBQBFwP1cSWe+XpRKvi0RAn+LAJ9VA0J1EpP6o/mSfX7oQs8LdmTOhgCfd8YI 4xFjXu3v2zcQvWauKNN5rGI= =6Hq1 -----END PGP SIGNATURE----- --nextPart1889014.kOgU2BCKBh--