From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754529Ab0EQQnb (ORCPT ); Mon, 17 May 2010 12:43:31 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:39338 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753548Ab0EQQn3 (ORCPT ); Mon, 17 May 2010 12:43:29 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=date:from:to:cc:subject:message-id:mime-version:content-type :content-disposition:user-agent; b=oqlYO5Q4pFA6/fh7bFwQcxuGRNWtsGA9wYxnv/X4fVP+9N7QvXs7QMWVFGIrSVWnca xV0NaXNyqie1KEq4ALVq3WRcGruf3IWm1xCpvNRVuH/ZVa6cI1z/fN+q9+Pj9xinWakE +136+yAeHoKjE2+ZsICybvDtvPYPqLmFX9M+s= Date: Mon, 17 May 2010 18:43:24 +0200 From: Andreas Herrmann To: "H. Peter Anvin" , Ingo Molnar , Thomas Gleixner Cc: linux-kernel@vger.kernel.org, Linus Torvalds Subject: [PATCH] x86, hpet: Add reference to chipset erratum documentation for disable-hpet-msi-quirk Message-ID: <20100517164324.GB10254@alberich.amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andreas Herrmann (At the moment the "SB700 Family Product Errata" document is available at http://support.amd.com/us/Embedded_TechDocs/46837.pdf) Signed-off-by: Andreas Herrmann --- arch/x86/kernel/quirks.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) Linus recommended to add a pointer to that erratum to the source. See http://marc.info/?i=alpine.LFD.2.00.1005170811400.4195@i5.linux-foundation.org Please apply. Thanks, Andreas diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c index cd2c336..e72d3fc 100644 --- a/arch/x86/kernel/quirks.c +++ b/arch/x86/kernel/quirks.c @@ -495,6 +495,9 @@ void force_hpet_resume(void) /* * HPET MSI on some boards (ATI SB700/SB800) has side effect on * floppy DMA. Disable HPET MSI on such platforms. + * See erratum #27 (Misinterpreted MSI Requests May Result in + * Corrupted LPC DMA Data) in AMD Publication #46837, + * "SB700 Family Product Errata", Rev. 1.0, March 2010. * * Also force the read back of the CMP register in hpet_next_event() * to work around the problem that the CMP register write seems to be -- 1.6.4.4