From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761155AbZLQEj6 (ORCPT ); Wed, 16 Dec 2009 23:39:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S936661AbZLQEio (ORCPT ); Wed, 16 Dec 2009 23:38:44 -0500 Received: from kroah.org ([198.145.64.141]:55420 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763957AbZLQEED (ORCPT ); Wed, 16 Dec 2009 23:04:03 -0500 X-Mailbox-Line: From gregkh@mini.kroah.org Wed Dec 16 19:56:47 2009 Message-Id: <20091217035647.865130289@mini.kroah.org> User-Agent: quilt/0.48-1 Date: Wed, 16 Dec 2009 19:55:35 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Cliff Wickman , Ingo Molnar Subject: [038/151] x86: SGI UV: Fix BAU initialization In-Reply-To: <20091217040208.GA26571@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.32-stable review patch. If anyone has any objections, please let us know. ------------------ From: Cliff Wickman commit e38e2af1c57c3eb5211331a5b4fcaae0c4a2a918 upstream. A memory mapped register that affects the SGI UV Broadcast Assist Unit's interrupt handling may sometimes be unintialized. Remove the condition on its initialization, as that condition can be randomly satisfied by a hardware reset. Signed-off-by: Cliff Wickman LKML-Reference: Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/tlb_uv.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- a/arch/x86/kernel/tlb_uv.c +++ b/arch/x86/kernel/tlb_uv.c @@ -817,10 +817,8 @@ static int __init uv_init_blade(int blad */ apicid = blade_to_first_apicid(blade); pa = uv_read_global_mmr64(pnode, UVH_BAU_DATA_CONFIG); - if ((pa & 0xff) != UV_BAU_MESSAGE) { - uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG, + uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG, ((apicid << 32) | UV_BAU_MESSAGE)); - } return 0; }