From mboxrd@z Thu Jan 1 00:00:00 1970 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 980CDC636CC for ; Mon, 13 Feb 2023 20:47:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229601AbjBMUra (ORCPT ); Mon, 13 Feb 2023 15:47:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41526 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229479AbjBMUr3 (ORCPT ); Mon, 13 Feb 2023 15:47:29 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A544E83FB for ; Mon, 13 Feb 2023 12:47:28 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id CFF38CE1D28 for ; Mon, 13 Feb 2023 20:47:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5F1AC433EF; Mon, 13 Feb 2023 20:47:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1676321244; bh=CxKp7DdRpIHLjyKvK/8EagwtvA0dnNmDwSHqDGmAmwA=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=ijPd2PKP+TMC7+P+NjEuiTm/Xko37dYQGHOYIwUvdyrPqNZhHk0AFGgO6F2k0TM7o ioS89gBKo368/y1po2aQidhAEu3/QR+vtaf+A+JE1lhaLfHyMzLx3k1c9A3xJoj+vM blAl7XLQnM9AlGq5+IaTu5fXxrkRy8yPz+8PutJXFoWDUmadezKiVPz9qGJkcc2SkN D6b2Jo10o/Xwo4Kv7VfztFUo/CGrugTgqtPpA4vftg7DPDgCt9d40wi6G+AnnZ4kzN kobvP2nuT2FrNqfDlj3+ReUFIZoAc37dOeXfDBIguvw7AHPHALEBVzn2vpQVom3ZY5 e5ABk69JqVjag== Date: Mon, 13 Feb 2023 14:47:22 -0600 From: Bjorn Helgaas To: regressions@lists.linux.dev Cc: linux-pci@vger.kernel.org Subject: Re: [REGRESSION] [Bug 216859] New: PCI bridge to bus boot hang at enumeration Message-ID: <20230213204722.GA2929794@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230201232750.GA1908996@bhelgaas> Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Wed, Feb 01, 2023 at 05:27:50PM -0600, Bjorn Helgaas wrote: > On Thu, Jan 26, 2023 at 06:11:24AM -0600, Bjorn Helgaas wrote: > > [+cc folks from 145eed48de27 and framebuffer folks, regression list] > > > > On Thu, Jan 12, 2023 at 02:08:19PM -0600, Bjorn Helgaas wrote: > > > On Wed, Dec 28, 2022 at 06:02:48AM -0600, Bjorn Helgaas wrote: > > > > On Wed, Dec 28, 2022 at 08:37:52AM +0000, bugzilla-daemon@kernel.org wrote: > > > > > https://bugzilla.kernel.org/show_bug.cgi?id=216859 > > > > > > > > > Summary: PCI bridge to bus boot hang at enumeration > > > > > Kernel Version: 6.1-rc1 > > > > > ... > > > > > > > > > With Kernel 6.1-rc1 the enumeration process stopped working for me, > > > > > see attachments. > > > > > > > > > > The enumeration works fine with Kernel 6.0 and below. > > > > > > > > > > Same problem still exists with v6.1. and v6.2.-rc1 > > > > This is a regression between v6.0 and v6.1-rc1. Console output during > > boot freezes after nvidiafb deactivates the VGA console. > > > > It was a lot of work for Zeno, but we finally isolated this console > > hang to 145eed48de27 ("fbdev: Remove conflicting devices on PCI bus"). > > > > The system actually does continue to boot and is accessible via ssh, > > but the console appears hung, at least for output. More details in > > the bugzilla starting at > > https://bugzilla.kernel.org/show_bug.cgi?id=216859#c47 . > > #regzbot introduced: 145eed48de27 > #regzbot dup: https://lore.kernel.org/all/D41A3A42-2412-4722-9090-01565058E525@gmail.com/ #regzbot fix: 04119ab1a49f ("nvidiafb: detect the hardware support before removing console.")