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 444E4C433EF for ; Sun, 30 Jan 2022 17:12:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355708AbiA3RMQ (ORCPT ); Sun, 30 Jan 2022 12:12:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234833AbiA3RMP (ORCPT ); Sun, 30 Jan 2022 12:12:15 -0500 Received: from mail-oi1-x22e.google.com (mail-oi1-x22e.google.com [IPv6:2607:f8b0:4864:20::22e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49871C061714; Sun, 30 Jan 2022 09:12:15 -0800 (PST) Received: by mail-oi1-x22e.google.com with SMTP id s9so22325925oib.11; Sun, 30 Jan 2022 09:12:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=w1dNkPhtgiRjushmjZUey1uH/mwMDz9W8IeIjD9XGNU=; b=QF78vYBJuFyFO0WuVGOnN8lRblJpn342qlEeX7HiKWboUdAtwbFRe3IeTC6lVcWB/R 4N84b2uUq2+PKSm35M7ONMSAwTC/Az0dw0ipKleJzJX2pMSA6J9nhBfISWdZWu5QJVq9 Fo2KgA4IjFPwqEf7VtfbL+V2p8nzGF2YrZm6hfaaCt06Fag/mTDRnUoBfERcs0XRRgYZ 0s6PTUxFBvh1truP4Kw2sc7kHYJm4j/x/3+pTbch9ghHfobfYHWUxsM/TcZgiH2YqryW ERjUmG8WbeJ7HXEmt5lTb4D3hBy1mtcBpyRJ9rRCAbaCfkQhD/VimAg/BuhC9lB1hbzA Hqmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=w1dNkPhtgiRjushmjZUey1uH/mwMDz9W8IeIjD9XGNU=; b=WYa2+bqSvKyQ9GXeG39oMUmdQUqi3I4xcp7vZO60G3sGwO3uOu3QXGWrCNK51WM8O2 teutqh2uIZY1Pz3FqlreM+v7273ZF6VQPuvqYfWNtob5kSMAt7TdMCzEVbk0mkAHGzZu qLhGHC7mhPdWgD/jh33S4Czmyh/9VGY5SufGeQPzpw2OhzlLhPx3DreoyN2WsBhPSlCW lFzzwI6F2W6do8CJuTPy1lyhGwgfuAOtZ2wLC7+P2tKNbiVuyWfUCHQMZTHch74oSwsk Hw1nuDdJ7odIJ7W5+Y8xeFyIOk/g3FQR/oZkvBtb0MmFFdgkAQbqMpRtnN1ozxqAU0gw Yb7A== X-Gm-Message-State: AOAM5307G+dzgB1KU+ncKIG+mMwtIBZx3Fz/5ib0ghp9PFTi7N1LnLuk QpLKuPtwM3n5tISYWQJ272s= X-Google-Smtp-Source: ABdhPJzDfpA/kFQ2ZUKPGwyRfaVdw4HLQweTlCDIHi6gw/h077fparPnBlJNMYVufYz9gxu/ali5cg== X-Received: by 2002:a05:6808:bca:: with SMTP id o10mr6747446oik.58.1643562733195; Sun, 30 Jan 2022 09:12:13 -0800 (PST) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id w9sm11309793ool.31.2022.01.30.09.12.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Jan 2022 09:12:12 -0800 (PST) Sender: Guenter Roeck Date: Sun, 30 Jan 2022 09:12:10 -0800 From: Guenter Roeck To: Thomas Gleixner Cc: LKML , Nishanth Menon , Mark Rutland , Stuart Yoder , Benjamin Herrenschmidt , Will Deacon , Ashok Raj , Michael Ellerman , Jassi Brar , Sinan Kaya , iommu@lists.linux-foundation.org, Peter Ujfalusi , Bjorn Helgaas , linux-arm-kernel@lists.infradead.org, Jason Gunthorpe , linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Kevin Tian , Arnd Bergmann , Robin Murphy , Alex Williamson , Cedric Le Goater , Santosh Shilimkar , Bjorn Helgaas , Megha Dey , Juergen Gross , Tero Kristo , Greg Kroah-Hartman , Vinod Koul , Marc Zygnier , dmaengine@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [patch V3 28/35] PCI/MSI: Simplify pci_irq_get_affinity() Message-ID: <20220130171210.GA3545402@roeck-us.net> References: <20211210221642.869015045@linutronix.de> <20211210221814.900929381@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211210221814.900929381@linutronix.de> Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Fri, Dec 10, 2021 at 11:19:26PM +0100, Thomas Gleixner wrote: > From: Thomas Gleixner > > Replace open coded MSI descriptor chasing and use the proper accessor > functions instead. > > Signed-off-by: Thomas Gleixner > Reviewed-by: Greg Kroah-Hartman > Reviewed-by: Jason Gunthorpe This patch results in the following runtime warning when booting x86 (32 bit) nosmp images from NVME in qemu. [ 14.825482] nvme nvme0: 1/0/0 default/read/poll queues ILLOPC: ca7c6d10: 0f 0b [ 14.826188] ------------[ cut here ]------------ [ 14.826307] WARNING: CPU: 0 PID: 7 at drivers/pci/msi/msi.c:1114 pci_irq_get_affinity+0x80/0x90 [ 14.826455] Modules linked in: [ 14.826640] CPU: 0 PID: 7 Comm: kworker/u2:0 Not tainted 5.17.0-rc1-00419-g1d2d8baaf053 #1 [ 14.826797] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 [ 14.827132] Workqueue: nvme-reset-wq nvme_reset_work [ 14.827336] EIP: pci_irq_get_affinity+0x80/0x90 [ 14.827452] Code: e8 d5 30 af ff 85 c0 75 bd 90 0f 0b 31 c0 5b 5e 5d c3 8d b4 26 00 00 00 00 90 5b b8 24 32 7e cb 5e 5d c3 8d b4 26 00 00 00 00 <0f> 0b eb e0 8d b4 26 00 00 00 00 8d 74 26 00 90 55 89 e5 57 56 53 [ 14.827717] EAX: 00000000 EBX: c18ba000 ECX: 00000000 EDX: c297c210 [ 14.827816] ESI: 00000001 EDI: c18ba000 EBP: c1247e24 ESP: c1247e1c [ 14.827924] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00000246 [ 14.828110] CR0: 80050033 CR2: ffda9000 CR3: 0b8ad000 CR4: 000006d0 [ 14.828268] Call Trace: [ 14.828554] blk_mq_pci_map_queues+0x26/0x70 [ 14.828710] nvme_pci_map_queues+0x75/0xc0 [ 14.828808] blk_mq_update_queue_map+0x86/0xa0 [ 14.828891] blk_mq_alloc_tag_set+0xf3/0x390 [ 14.828965] ? nvme_wait_freeze+0x3d/0x50 [ 14.829137] nvme_reset_work+0xd02/0x1120 [ 14.829269] ? lock_acquire+0xc3/0x290 [ 14.829435] process_one_work+0x1ed/0x490 [ 14.829569] worker_thread+0x15e/0x3c0 [ 14.829665] kthread+0xd3/0x100 [ 14.829729] ? process_one_work+0x490/0x490 [ 14.829799] ? kthread_complete_and_exit+0x20/0x20 [ 14.829890] ret_from_fork+0x1c/0x28 Bisect results below. #regzbot introduced: f48235900182d6 Guenter --- # bad: [e783362eb54cd99b2cac8b3a9aeac942e6f6ac07] Linux 5.17-rc1 # good: [df0cc57e057f18e44dac8e6c18aba47ab53202f9] Linux 5.16 git bisect start 'v5.17-rc1' 'v5.16' # good: [fef8dfaea9d6c444b6c2174b3a2b0fca4d226c5e] Merge tag 'regulator-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator git bisect good fef8dfaea9d6c444b6c2174b3a2b0fca4d226c5e # bad: [3ceff4ea07410763d5d4cccd60349bf7691e7e61] Merge tag 'sound-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound git bisect bad 3ceff4ea07410763d5d4cccd60349bf7691e7e61 # good: [57ea81971b7296b42fc77424af44c5915d3d4ae2] Merge tag 'usb-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb git bisect good 57ea81971b7296b42fc77424af44c5915d3d4ae2 # bad: [feb7a43de5ef625ad74097d8fd3481d5dbc06a59] Merge tag 'irq-msi-2022-01-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect bad feb7a43de5ef625ad74097d8fd3481d5dbc06a59 # good: [ce990f1de0bc6ff3de43d385e0985efa980fba24] Merge tag 'for-linus-5.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip git bisect good ce990f1de0bc6ff3de43d385e0985efa980fba24 # good: [4afd2a9355a9deb16ea42b896820dacf49843a8f] Merge branches 'clk-ingenic' and 'clk-mediatek' into clk-next git bisect good 4afd2a9355a9deb16ea42b896820dacf49843a8f # good: [455e73a07f6e288b0061dfcf4fcf54fa9fe06458] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux git bisect good 455e73a07f6e288b0061dfcf4fcf54fa9fe06458 # bad: [f2948df5f87a722591499da60ab91c611422f755] x86/pci/xen: Use msi_for_each_desc() git bisect bad f2948df5f87a722591499da60ab91c611422f755 # good: [93296cd1325d1d9afede60202d8833011c9001f2] PCI/MSI: Allocate MSI device data on first use git bisect good 93296cd1325d1d9afede60202d8833011c9001f2 # good: [82ff8e6b78fc4587a4255301f0a283506daf11b6] PCI/MSI: Use msi_get_virq() in pci_get_vector() git bisect good 82ff8e6b78fc4587a4255301f0a283506daf11b6 # bad: [125282cd4f33ecd53a24ae4807409da0e5e90fd4] genirq/msi: Move descriptor list to struct msi_device_data git bisect bad 125282cd4f33ecd53a24ae4807409da0e5e90fd4 # bad: [065afdc9c521f05c53f226dabe5dda2d30294d65] iommu/arm-smmu-v3: Use msi_get_virq() git bisect bad 065afdc9c521f05c53f226dabe5dda2d30294d65 # bad: [f6632bb2c1454b857adcd131320379ec16fd8666] dmaengine: mv_xor_v2: Get rid of msi_desc abuse git bisect bad f6632bb2c1454b857adcd131320379ec16fd8666 # bad: [f48235900182d64537c6e8f8dc0932b57a1a0638] PCI/MSI: Simplify pci_irq_get_affinity() git bisect bad f48235900182d64537c6e8f8dc0932b57a1a0638 # first bad commit: [f48235900182d64537c6e8f8dc0932b57a1a0638] PCI/MSI: Simplify pci_irq_get_affinity()