All of lore.kernel.org
 help / color / mirror / Atom feed
From: Joerg Roedel <joerg.roedel@amd.com>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Antonio Quartulli <ordex@autistici.org>,
	linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org
Subject: Re: warn_slowpath_common in drivers/pci/search.c:44 on linux-3.4.0
Date: Tue, 29 May 2012 10:35:53 +0200	[thread overview]
Message-ID: <20120529083552.GN2604@amd.com> (raw)
In-Reply-To: <CAErSpo553_-AivRa7VbjHrFraHaO4NYoYR7A9Am5fkDP-CMvSA@mail.gmail.com>

Hi Antonio,

On Sat, May 26, 2012 at 09:09:52AM -0600, Bjorn Helgaas wrote:
> On Sat, May 26, 2012 at 2:25 AM, Antonio Quartulli <ordex@autistici.org> wrote:
> > [    1.054279] WARNING: at drivers/pci/search.c:44 pci_find_upstream_pcie_bridge+0x5e/0x70()
> > [    1.054385] Hardware name: Latitude E5420
> > [    1.054457] Modules linked in:
> > [    1.054568] Pid: 1, comm: swapper/0 Not tainted 3.4.0ordex+ #3
> > [    1.054643] Call Trace:
> > [    1.054716]  [<ffffffff81033d4a>] warn_slowpath_common+0x7a/0xb0
> > [    1.054793]  [<ffffffff81033d95>] warn_slowpath_null+0x15/0x20
> > [    1.054869]  [<ffffffff8123899e>] pci_find_upstream_pcie_bridge+0x5e/0x70
> > [    1.054949]  [<ffffffff813babe7>] intel_iommu_device_group+0x77/0x100
> > [    1.055027]  [<ffffffff813b52d5>] add_iommu_group+0x35/0x60
> > [    1.055113]  [<ffffffff813b52a0>] ? bus_set_iommu+0x50/0x50
> > [    1.055191]  [<ffffffff8132c586>] bus_for_each_dev+0x56/0x90
> > [    1.055267]  [<ffffffff813b528b>] bus_set_iommu+0x3b/0x50
> > [    1.055344]  [<ffffffff818c4920>] intel_iommu_init+0xab0/0xb3f
> > [    1.055421]  [<ffffffff81120b26>] ? sys_mkdirat+0x76/0xd0
> > [    1.055499]  [<ffffffff8189b0db>] ? memblock_find_dma_reserve+0x13d/0x13d
> > [    1.055578]  [<ffffffff8189b0ee>] pci_iommu_init+0x13/0x3e
> > [    1.055655]  [<ffffffff810001ca>] do_one_initcall+0x3a/0x170
> > [    1.055732]  [<ffffffff81897c35>] kernel_init+0x148/0x1cc
> > [    1.055807]  [<ffffffff81897588>] ? do_early_param+0x86/0x86
> > [    1.055884]  [<ffffffff814fc914>] kernel_thread_helper+0x4/0x10
> > [    1.055963]  [<ffffffff8105de60>] ? finish_task_switch+0x80/0x110
> > [    1.056040]  [<ffffffff814fafdd>] ? retint_restore_args+0xe/0xe
> > [    1.056126]  [<ffffffff81897aed>] ? start_kernel+0x30b/0x30b
> > [    1.056203]  [<ffffffff814fc910>] ? gs_change+0xb/0xb

Hmm, this looks like pci_find_upstream_pcie_bridge() found a PCIe device
in the chain which is not a bridge. Can you please post the output of
'lspci -vvv' and 'lspci -t'?

Thanks,

	Joerg

-- 
AMD Operating System Research Center

Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
General Managers: Alberto Bozzo
Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632

WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joerg.roedel@amd.com>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Antonio Quartulli <ordex@autistici.org>,
	<linux-pci@vger.kernel.org>, <iommu@lists.linux-foundation.org>
Subject: Re: warn_slowpath_common in drivers/pci/search.c:44 on linux-3.4.0
Date: Tue, 29 May 2012 10:35:53 +0200	[thread overview]
Message-ID: <20120529083552.GN2604@amd.com> (raw)
In-Reply-To: <CAErSpo553_-AivRa7VbjHrFraHaO4NYoYR7A9Am5fkDP-CMvSA@mail.gmail.com>

Hi Antonio,

On Sat, May 26, 2012 at 09:09:52AM -0600, Bjorn Helgaas wrote:
> On Sat, May 26, 2012 at 2:25 AM, Antonio Quartulli <ordex@autistici.org> wrote:
> > [    1.054279] WARNING: at drivers/pci/search.c:44 pci_find_upstream_pcie_bridge+0x5e/0x70()
> > [    1.054385] Hardware name: Latitude E5420
> > [    1.054457] Modules linked in:
> > [    1.054568] Pid: 1, comm: swapper/0 Not tainted 3.4.0ordex+ #3
> > [    1.054643] Call Trace:
> > [    1.054716]  [<ffffffff81033d4a>] warn_slowpath_common+0x7a/0xb0
> > [    1.054793]  [<ffffffff81033d95>] warn_slowpath_null+0x15/0x20
> > [    1.054869]  [<ffffffff8123899e>] pci_find_upstream_pcie_bridge+0x5e/0x70
> > [    1.054949]  [<ffffffff813babe7>] intel_iommu_device_group+0x77/0x100
> > [    1.055027]  [<ffffffff813b52d5>] add_iommu_group+0x35/0x60
> > [    1.055113]  [<ffffffff813b52a0>] ? bus_set_iommu+0x50/0x50
> > [    1.055191]  [<ffffffff8132c586>] bus_for_each_dev+0x56/0x90
> > [    1.055267]  [<ffffffff813b528b>] bus_set_iommu+0x3b/0x50
> > [    1.055344]  [<ffffffff818c4920>] intel_iommu_init+0xab0/0xb3f
> > [    1.055421]  [<ffffffff81120b26>] ? sys_mkdirat+0x76/0xd0
> > [    1.055499]  [<ffffffff8189b0db>] ? memblock_find_dma_reserve+0x13d/0x13d
> > [    1.055578]  [<ffffffff8189b0ee>] pci_iommu_init+0x13/0x3e
> > [    1.055655]  [<ffffffff810001ca>] do_one_initcall+0x3a/0x170
> > [    1.055732]  [<ffffffff81897c35>] kernel_init+0x148/0x1cc
> > [    1.055807]  [<ffffffff81897588>] ? do_early_param+0x86/0x86
> > [    1.055884]  [<ffffffff814fc914>] kernel_thread_helper+0x4/0x10
> > [    1.055963]  [<ffffffff8105de60>] ? finish_task_switch+0x80/0x110
> > [    1.056040]  [<ffffffff814fafdd>] ? retint_restore_args+0xe/0xe
> > [    1.056126]  [<ffffffff81897aed>] ? start_kernel+0x30b/0x30b
> > [    1.056203]  [<ffffffff814fc910>] ? gs_change+0xb/0xb

Hmm, this looks like pci_find_upstream_pcie_bridge() found a PCIe device
in the chain which is not a bridge. Can you please post the output of
'lspci -vvv' and 'lspci -t'?

Thanks,

	Joerg

-- 
AMD Operating System Research Center

Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
General Managers: Alberto Bozzo
Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632


  reply	other threads:[~2012-05-29  8:35 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-26  8:25 warn_slowpath_common in drivers/pci/search.c:44 on linux-3.4.0 Antonio Quartulli
2012-05-26 15:09 ` Bjorn Helgaas
2012-05-29  8:35   ` Joerg Roedel [this message]
2012-05-29  8:35     ` Joerg Roedel
2012-05-29  8:56     ` Antonio Quartulli
2012-05-29 10:16       ` Joerg Roedel
2012-05-29 10:16         ` Joerg Roedel
2012-05-29 16:13         ` Jiang Liu
2013-03-24 14:34           ` Antonio Quartulli
2013-12-08 14:26       ` Antonio Quartulli
     [not found]         ` <52A4819A.50501-x4xJYDvStAgysxA8WJXlww@public.gmane.org>
2013-12-09 17:25           ` Bjorn Helgaas
2013-12-09 17:25             ` Bjorn Helgaas
2013-12-09 17:36             ` Alex Williamson
2013-12-09 17:36               ` Alex Williamson

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20120529083552.GN2604@amd.com \
    --to=joerg.roedel@amd.com \
    --cc=bhelgaas@google.com \
    --cc=iommu@lists.linux-foundation.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=ordex@autistici.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.