From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756174AbbA2Bhu (ORCPT ); Wed, 28 Jan 2015 20:37:50 -0500 Received: from mail-bn1bon0130.outbound.protection.outlook.com ([157.56.111.130]:57792 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756148AbbA2Bhr (ORCPT ); Wed, 28 Jan 2015 20:37:47 -0500 Message-ID: <1422486205.10544.99.camel@freescale.com> Subject: Re: [PATCH v2] powerpc/mpic: Add DT option to skip readback after EOI From: Scott Wood To: Segher Boessenkool CC: Bogdan Purcareata , , Date: Wed, 28 Jan 2015 17:03:25 -0600 In-Reply-To: <20150128201533.GA10436@gate.crashing.org> References: <1422371952-1126-1-git-send-email-bogdan.purcareata@freescale.com> <1422395873.10544.61.camel@freescale.com> <20150128201533.GA10436@gate.crashing.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.7-0ubuntu1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Originating-IP: [2601:2:5800:3f7:12bf:48ff:fe84:c9a0] X-ClientProxiedBy: CO2PR11CA0008.namprd11.prod.outlook.com (10.141.242.146) To BN1PR0301MB0723.namprd03.prod.outlook.com (25.160.78.142) Authentication-Results: kernel.crashing.org; dkim=none (message not signed) header.d=none;kernel.crashing.org; dmarc=none action=none header.from=freescale.com; X-DmarcAction-Test: None X-Microsoft-Antispam: UriScan:;UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:(3005004);SRVR:BN1PR0301MB0723; X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:(601004);SRVR:BN1PR0301MB0723; X-Forefront-PRVS: 047001DADA X-Forefront-Antispam-Report: SFV:NSPM;SFS:(10019020)(6009001)(51704005)(377424004)(24454002)(33646002)(42186005)(103116003)(50466002)(40100003)(122386002)(36756003)(47776003)(50226001)(23676002)(46102003)(87976001)(2950100001)(62966003)(110136001)(77156002)(92566002)(50986999)(76176999)(86362001);DIR:OUT;SFP:1102;SCL:1;SRVR:BN1PR0301MB0723;H:[IPv6:2601:2:5800:3f7:12bf:48ff:fe84:c9a0];FPR:;SPF:None;MLV:sfv;LANG:en; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:;SRVR:BN1PR0301MB0723; X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Jan 2015 23:03:33.3795 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN1PR0301MB0723 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BN1PR0301MB0707; X-OriginatorOrg: freescale.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2015-01-28 at 14:15 -0600, Segher Boessenkool wrote: > On Tue, Jan 27, 2015 at 03:57:53PM -0600, Scott Wood wrote: > > At this point, given the previous discussion, does anyone object to > > removing the readback entirely? Do we have any evidence that reading > > WHOAMI is effective at addressing whatever problem reading EOI made go > > away on the relevant platform? > > What platforms were those? Just test there! Ben said "some macs". The only Mac I have is packed away and may not be the one Ben had in mind, so I can't "test there". > If no one remembers, they can not (any longer) be important platforms ;-) > Just remove the code, and if in twelve months finally someone reports a > failure we will at least know what platform it was. This is what I was trying to encourage. :-) -Scott From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from na01-bn1-obe.outbound.protection.outlook.com (mail-bn1on0140.outbound.protection.outlook.com [157.56.110.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 9F3EA1A0A40 for ; Thu, 29 Jan 2015 10:03:43 +1100 (AEDT) Message-ID: <1422486205.10544.99.camel@freescale.com> Subject: Re: [PATCH v2] powerpc/mpic: Add DT option to skip readback after EOI From: Scott Wood To: Segher Boessenkool Date: Wed, 28 Jan 2015 17:03:25 -0600 In-Reply-To: <20150128201533.GA10436@gate.crashing.org> References: <1422371952-1126-1-git-send-email-bogdan.purcareata@freescale.com> <1422395873.10544.61.camel@freescale.com> <20150128201533.GA10436@gate.crashing.org> Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Cc: linuxppc-dev@lists.ozlabs.org, Bogdan Purcareata , linux-kernel@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Wed, 2015-01-28 at 14:15 -0600, Segher Boessenkool wrote: > On Tue, Jan 27, 2015 at 03:57:53PM -0600, Scott Wood wrote: > > At this point, given the previous discussion, does anyone object to > > removing the readback entirely? Do we have any evidence that reading > > WHOAMI is effective at addressing whatever problem reading EOI made go > > away on the relevant platform? > > What platforms were those? Just test there! Ben said "some macs". The only Mac I have is packed away and may not be the one Ben had in mind, so I can't "test there". > If no one remembers, they can not (any longer) be important platforms ;-) > Just remove the code, and if in twelve months finally someone reports a > failure we will at least know what platform it was. This is what I was trying to encourage. :-) -Scott