From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.free-electrons.com ([94.23.35.102]:59303 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754953Ab3A1WKG (ORCPT ); Mon, 28 Jan 2013 17:10:06 -0500 Date: Mon, 28 Jan 2013 23:09:59 +0100 From: Thomas Petazzoni To: Arnd Bergmann Cc: Bjorn Helgaas , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Jason Cooper , Andrew Lunn , Gregory Clement , Maen Suleiman , Lior Amsalem , Thierry Reding , "Eran Ben-Avi" , Nadav Haklai , Shadi Ammouri , Tawfik Bayouk , Stephen Warren , Jason Gunthorpe , "Russell King - ARM Linux" Subject: Re: [PATCH v2 07/27] PCI: Add software-emulated host bridge Message-ID: <20130128230959.45cb503e@skate> In-Reply-To: <201301282018.17714.arnd@arndb.de> References: <1359399397-29729-1-git-send-email-thomas.petazzoni@free-electrons.com> <1359399397-29729-8-git-send-email-thomas.petazzoni@free-electrons.com> <201301282018.17714.arnd@arndb.de> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-pci-owner@vger.kernel.org List-ID: Dear Arnd Bergmann, On Mon, 28 Jan 2013 20:18:17 +0000, Arnd Bergmann wrote: > Not even a description why this is needed? > > This patch (together with patch 8) seems like the most controversial > one of the series, so you should better provide a really good reason > why we would emulate something in software rather than using whatever > hardware is there. Hum, you're right. In fact, the very reason why I'm adding an emulated host bridge and emulated PCI-to-PCI bridges is simply because this was one of the main suggestion raised during the review of the first revision of this patch set. Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com