From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from phobos.cabal.ca (206-248-169-182.dsl.ncf.ca [206.248.169.182]) by ozlabs.org (Postfix) with ESMTP id EC552DDE29 for ; Tue, 19 Feb 2008 17:11:53 +1100 (EST) Date: Tue, 19 Feb 2008 01:11:50 -0500 From: Kyle McMartin To: Bjorn Helgaas Subject: Re: [patch 0/4] RFC: PCI: consolidate several pcibios_enable_resources() implementations Message-ID: <20080219061150.GA10115@phobos.i.cabal.ca> References: <20080219043952.845136014@ldl.fc.hp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20080219043952.845136014@ldl.fc.hp.com> Cc: linux-arch@vger.kernel.org, Chris Zankel , Grant Grundler , linux-parisc@vger.kernel.org, Matthew Wilcox , Kyle McMartin , linuxppc-dev@ozlabs.org, Paul Mackerras , linux-pci@atrey.karlin.mff.cuni.cz, linux-arm-kernel@lists.arm.linux.org.uk, Russell King List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, Feb 18, 2008 at 09:39:52PM -0700, Bjorn Helgaas wrote: > - PA-RISC always turns on SERR and PARITY, which no other arch does > I suspect this is because we set the host bus adapters to hard fail (HPMC) on detecting an error, since we don't want to 1) return possibly bogus (-1) data 2) write code to use the (undocumented) error detection More to the point, I suspect it's extra paranoia because firmware has set it up this way. I put in a quick hack to test whether those bits were set, and they came enabled that way by firmware on all the boxes I tested. (Disclaimer, I didn't have any easily accessible boxes with add-on cards installed, so firmware might just set it up for core devices, and we're making sure its set everywhere.) cheers, Kyle