From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933514Ab2GDL1v (ORCPT ); Wed, 4 Jul 2012 07:27:51 -0400 Received: from smtp.ctxuk.citrix.com ([62.200.22.115]:26622 "EHLO SMTP.EU.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932842Ab2GDL1u (ORCPT ); Wed, 4 Jul 2012 07:27:50 -0400 X-IronPort-AV: E=Sophos;i="4.77,522,1336348800"; d="scan'208";a="13364422" Date: Wed, 4 Jul 2012 12:27:17 +0100 From: Stefano Stabellini X-X-Sender: sstabellini@kaball.uk.xensource.com To: David Vrabel CC: Stefano Stabellini , "xen-devel@lists.xensource.com" , "linux-kernel@vger.kernel.org" , Ian Campbell Subject: Re: [PATCH WIP 2/5] xen/arm: set xen_platform_pci_unplug to XEN_UNPLUG_ALL In-Reply-To: <4FF4281E.9040801@citrix.com> Message-ID: References: <1341400520-31770-2-git-send-email-stefano.stabellini@eu.citrix.com> <4FF4281E.9040801@citrix.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 4 Jul 2012, David Vrabel wrote: > On 04/07/12 12:15, Stefano Stabellini wrote: > > Set xen_platform_pci_unplug to XEN_UNPLUG_ALL by default to make > > blkfront happy. The parameter doesn't make sense on ARM and should be > > removed. > > Why is this parameter nonsensical on ARM? ARM systems can have PCI devices. Because we shouldn't assume the presence of a PCI bus on ARM. Moreover it would be nice to avoid the ugly unplug protocol entirely if we can.