Received: by 2002:a05:6a10:2726:0:0:0:0 with SMTP id ib38csp151491pxb; Thu, 31 Mar 2022 01:51:46 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz0k7hf9TEeckB3bxU58IjChxQfrmP72kH+ZQ/8I4+r7bF+Eq+xBKw5o1z9p7fselalntb5 X-Received: by 2002:a05:6402:42c6:b0:419:276c:4a64 with SMTP id i6-20020a05640242c600b00419276c4a64mr15398460edc.119.1648716706712; Thu, 31 Mar 2022 01:51:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1648716706; cv=none; d=google.com; s=arc-20160816; b=MWUBTJznZ2fIm+DDThi6S7K4Z95a/cpI8Lh5vWCmw+uJUbTZCLxfXE1L3xP70/N2N6 s+/Rns4t309yctm4nuEg3pDUKA5MWjZ+R/kgqxIcAa70YQuRUGSt28fUw1YHMcqX4ZRh cuJLhex7i7HawsWkaEzmiXus2cCNoHUgxxQDmnW+cZ+Ujy226Q1kIBTRX4YbrsDqenWc 0bXXZ5zKuBtGGS09TXOGADp/iOvW922hD+ZN2A5OPodp7QW08hinb5x/YbAfVpX4xJ+i ShdSqGHvxnqzQkXiH1gOFnI7dvGn0ybTIWgXKmNKMBvAPjABPKwrXHHYjQuWG6O4wSk1 9gww== 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=0ftxOXvNU3gEojMCsafS99va3MPPTytmwmOUxbKgkz102NprUKWMNf0PeejT3iKr5X nq5M6opJbrlK4jDSQOxUfz+3EbiPNB3bHnucGiRTq7ibWbXGfbZbn4EQKhzX02oCpcsg UzuSb+iBdeK3UP2jHv0YEZ1jwoFLR/nL5QBFDgh1omAz7HUDcmAnfU8//YKs3Q1pacQB CeHXvAzjnUUkVjFj4IuOyKTh7CLFCPuyagkDvlAR5iWMfa4pgEIc4bh8tt4PhH3GQfvp RZMyARzkUQ4AmE2z0kGUd5f/f4K7/rc+qSci49vksbCvYZVR8nJi0SepqUrKHcc49AUN WbEQ== 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 b16-20020aa7cd10000000b00418c2b5bf83si21689436edw.613.2022.03.31.01.51.21; Thu, 31 Mar 2022 01:51:46 -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 S232023AbiCaHOM (ORCPT + 99 others); Thu, 31 Mar 2022 03:14:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231945AbiCaHNd (ORCPT ); Thu, 31 Mar 2022 03:13:33 -0400 Received: from angie.orcam.me.uk (angie.orcam.me.uk [78.133.224.34]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 0CA10BD2F0; Thu, 31 Mar 2022 00:11:25 -0700 (PDT) Received: by angie.orcam.me.uk (Postfix, from userid 500) id 91CB89200B3; Thu, 31 Mar 2022 09:11:24 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by angie.orcam.me.uk (Postfix) with ESMTP id 8FA5592009E; Thu, 31 Mar 2022 08:11:24 +0100 (BST) Date: Thu, 31 Mar 2022 08:11:24 +0100 (BST) From: "Maciej W. Rozycki" To: Bjorn Helgaas cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PING][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