Received: by 2002:a05:6a10:6d10:0:0:0:0 with SMTP id gq16csp1233138pxb; Thu, 14 Apr 2022 01:06:36 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz7SAgMKcmW+RrOIxZM4L3z+xTsa/ega+i9P1sixusfZETAsYrpcJxzAn/+/c7pjOvkbr0i X-Received: by 2002:a17:907:9812:b0:6da:aaaf:7713 with SMTP id ji18-20020a170907981200b006daaaaf7713mr1292151ejc.163.1649923596686; Thu, 14 Apr 2022 01:06:36 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1649923596; cv=none; d=google.com; s=arc-20160816; b=x6fv8ZF6jj+j9RCp0PNYmrEp6mI7hxLgzpCukELZYyeYAxmbyamfAEaMWDFZo/3qYP SPhMWBLlhDS8h1jecVpeHDK9j67IDpbyDGSSnXtK8lTTSxtgpVjxQ16KX+g+ByqiDjZb eEs5l7fbHp8YONLXk2VEkFYbyy8J4NRsHm6bWHGbd1gyuRwz6mEeetIrT3E4UvREMx1r zQgqS+Z3gp83C1Bz62FThU/A0YbJJPO3sL/shbj8JCpZ9vXb9rsEWpPNXD3IBk4DJOwr 70MuqzSWQh6u/KdgK5WPY9gUn8nYTv9NO2oupRsbS2cr7732gx7xhcYqgIK3SXbWFZG3 pKZg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:user-agent:references:message-id :in-reply-to:subject:cc:to:from:date; bh=gv+1nDEhq0F+r2qLDhOJgfQJdQJIBFuX0OVqpinrCm8=; b=UaDo8IVspO1Li4hX23dNkhw3H2h21a6HrWoc9jaEXJxNHfyBUiajqqfirqe17ZrZKA 9XyG7syirlzxOIQg5xE1Zus6oSDmwHUUsm93VbkUGa6GICz/oCvboGi2gbmxOVdSOUYy 6B4QSgj1L8cpvurU5enkAEUb/BaI58/nCMHQaGG4vzpss2VPcUp6m3aeGOQDu0BJASP+ CzIhwQ5Yb3AAZkZGbPrmfBc3Yc6PEmVu0ny46E5iyBQuDXMz1rcDqNXXqpEFDe6UVqcN 9ZEnGz0gg+avfa+diu7syZJxiEzXkIuNrDwoh9H9nkoB8CrVYyJSEFDNGYjB+cw9cvLW rvpw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id t18-20020a056402525200b00418c2b5bd71si3747630edd.83.2022.04.14.01.06.11; Thu, 14 Apr 2022 01:06:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238341AbiDMWzv (ORCPT + 99 others); Wed, 13 Apr 2022 18:55:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238282AbiDMWzq (ORCPT ); Wed, 13 Apr 2022 18:55:46 -0400 Received: from angie.orcam.me.uk (angie.orcam.me.uk [78.133.224.34]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 70EE55882D; Wed, 13 Apr 2022 15:53:23 -0700 (PDT) Received: by angie.orcam.me.uk (Postfix, from userid 500) id C07E692009D; Thu, 14 Apr 2022 00:53:22 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by angie.orcam.me.uk (Postfix) with ESMTP id BC4E692009C; Wed, 13 Apr 2022 23:53:22 +0100 (BST) Date: Wed, 13 Apr 2022 23:53:22 +0100 (BST) From: "Maciej W. Rozycki" To: Bjorn Helgaas cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PING^2][PATCH] PCI: Avoid handing out address 0 to devices In-Reply-To: Message-ID: References: User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 26 Feb 2022, Maciej W. Rozycki wrote: > We have numerous platforms that permit assigning addresses from 0 to PCI > devices, both in the memory and the I/O bus space, and we happily do so > if there is no conflict, e.g.: Ping for: Maciej