From patchwork Mon Nov 21 18:13:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 13051525 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5CE4C43219 for ; Mon, 21 Nov 2022 18:18:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230390AbiKUSS3 (ORCPT ); Mon, 21 Nov 2022 13:18:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230291AbiKUSS1 (ORCPT ); Mon, 21 Nov 2022 13:18:27 -0500 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 122F0C72D0; Mon, 21 Nov 2022 10:18:25 -0800 (PST) Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 5.1.0) id f83118289e0b1ce8; Mon, 21 Nov 2022 19:18:22 +0100 Received: from kreacher.localnet (unknown [213.134.163.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id 200C7780F76; Mon, 21 Nov 2022 19:18:22 +0100 (CET) Authentication-Results: v370.home.net.pl; dmarc=none (p=none dis=none) header.from=rjwysocki.net Authentication-Results: v370.home.net.pl; spf=fail smtp.mailfrom=rjwysocki.net From: "Rafael J. Wysocki" To: Bjorn Helgaas Cc: Rodrigo Vivi , Lukas Wunner , LKML , Linux ACPI , Linux PCI , Linux PM , Mika Westerberg Subject: [PATCH v1 0/2] PCI: hotplug: Add checks to avoid doing hotplug on PCIe Upstream Ports Date: Mon, 21 Nov 2022 19:13:15 +0100 Message-ID: <5623410.DvuYhMxLoT@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.163.140 X-CLIENT-HOSTNAME: 213.134.163.140 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvgedrheeigdduuddtucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepffffffekgfehheffleetieevfeefvefhleetjedvvdeijeejledvieehueevueffnecukfhppedvudefrddufeegrdduieefrddugedtnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvddufedrudefgedrudeifedrudegtddphhgvlhhopehkrhgvrggthhgvrhdrlhhotggrlhhnvghtpdhmrghilhhfrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqedpnhgspghrtghpthhtohepkedprhgtphhtthhopehhvghlghgrrghssehkvghrnhgvlhdrohhrghdprhgtphhtthhopehrohgurhhighhordhvihhvihesihhnthgvlhdrtghomhdprhgtphhtthhopehluhhkrghsseifuhhnnhgvrhdruggvpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqrggtphhisehvghgv rhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqphgtihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehmihhkrgdrfigvshhtvghrsggvrhhgsehlihhnuhigrdhinhhtvghlrdgtohhm X-DCC--Metrics: v370.home.net.pl 1024; Body=8 Fuz1=8 Fuz2=8 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Hi All, PCIe Upstream Ports are not hotplug-capable by definition, but it turns out that in some cases, if the system is configured in a particularly interesting way, the kernel may be made attempt to operate an Upstream Port as a hotplug one which causes functional issues to appear. The following 2 patches amend the code to prevent this behavior from occurring. Thanks!