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