Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752350Ab1BAUnB (ORCPT ); Tue, 1 Feb 2011 15:43:01 -0500 Received: from ausc60pc101.us.dell.com ([143.166.85.206]:30027 "EHLO ausc60pc101.us.dell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751023Ab1BAUnA convert rfc822-to-8bit (ORCPT ); Tue, 1 Feb 2011 15:43:00 -0500 X-Loopcount0: from 10.175.216.250 From: To: , Date: Tue, 1 Feb 2011 14:42:53 -0600 Subject: RE: [PATCH] dcdbas: force SMI to happen when expected Thread-Topic: [PATCH] dcdbas: force SMI to happen when expected Thread-Index: Acu3PG98MXpHU3c3RgShh8YfRATX4wLE6T7g Message-ID: References: <07E32F241046DA418A0381C1225BFC011A453F262B@AUSX7MCPS301.AMER.DELL.COM> In-Reply-To: <07E32F241046DA418A0381C1225BFC011A453F262B@AUSX7MCPS301.AMER.DELL.COM> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 923 Lines: 20 On 01/18/2011 12:21 PM, Stuart Hayes wrote: > The dcdbas driver can do an I/O write to cause a SMI to occur. On some > systems I/O writes are posted in the chipset and don't complete > immediately. This can result in the SMI happening at a later time. > This can result in random failures since the SMI handler expects the > EBX register to contain a pointer, and the handler can write to memory. > > Performing an I/O read to the same address as the I/O write will force > the I/O write to complete. The patch is against the 2.6.37 kernel and > has been tested. > > Signed-off-by: Stuart Hayes Acked-by: Doug Warzecha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/