linux-kernel - WARNING: at drivers/pci/pci-driver.c:368 pci_legacy

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Message-Id: <200901211414.18009.elendil@planet.nl>
Date:	Wed, 21 Jan 2009 14:14:17 +0100
From:	Frans Pop <elendil@...net.nl>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	linux-kernel@...r.kernel.org
Subject: WARNING: at drivers/pci/pci-driver.c:368 pci_legacy_suspend+0x7b/0xb8()

Hi Rafael,

My last suspend to RAM gave me the WARN below.

This is with 2.6.28-rc2 with the following patches on top:
* hp-wmi: fix regressions caused by missing if statement
* double disk spin off fix:
  Hibernation: Introduce system_entering_hibernation
  DMI: Introduce dmi_first_match to make the interface more flexible
  SATA: Blacklisting of systems that spin off disks during ACPI power off
  SATA AHCI: Blacklist system that spins off disks during ACPI power off
  SATA Sil: Blacklist system that spins off disks during ACPI power off
  SATA PIIX: Blacklist system that spins off disks during ACPI power off
* selected patches based on regression overview:
  USB: Fix suspend-resume of PCI USB controllers
  Revert "x86: signal: change type of paramter for sys_rt_sigreturn()"
  USB: don't enable wakeup by default for PCI host controllers
  work_on_cpu: dont try to get_online_cpus() in work_on_cpu.
  PCI PM: Restore standard config registers of all devices early

I suspect the cause to be the last patch, as an earlier suspend which I 
did without that patch did not result in the warning.

ricoh-mmc: Suspending.
ricoh-mmc: Controller is now re-enabled.
------------[ cut here ]------------
WARNING: at drivers/pci/pci-driver.c:368 pci_legacy_suspend+0x7b/0xb8()
Hardware name: HP Compaq 2510p Notebook PC
Modules linked in: tcp_diag inet_diag i915 drm i2c_algo_bit i2c_core ppdev 
parport_pc lp parport ipv6 nfs lockd nfs_acl auth_rpcgss sunrpc ext2 
coretemp hp_wmi acpi_cpufreq loop snd_hda_codec_analog snd_hda_intel 
snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss 
arc4 snd_seq_midi snd_rawmidi ecb snd_seq_midi_event snd_seq iwlagn 
iwlcore snd_timer snd_seq_device rfkill snd lib80211 mac80211 serio_raw 
soundcore pcmcia snd_page_alloc hp_accel cfg80211 psmouse pcspkr iTCO_wdt 
yenta_socket rsrc_nonstatic pcmcia_core usblp intel_agp wmi video output 
lis3lv02d container battery ac button joydev evdev ext3 jbd mbcache 
sha256_generic aes_x86_64 aes_generic cbc usbhid hid dm_crypt dm_mirror 
dm_region_hash dm_log dm_snapshot dm_mod sg sr_mod cdrom sd_mod piix 
ide_pci_generic ata_piix ide_core pata_acpi ohci1394 sdhci_pci sdhci 
ieee1394 mmc_core led_class ricoh_mmc ata_generic ehci_hcd libata 
uhci_hcd e1000e scsi_mod thermal processor fan thermal_sys
Pid: 6325, comm: s2ram Not tainted 2.6.29-rc2 #7
Call Trace:
 [<ffffffff802398cf>] warn_slowpath+0xd3/0x10f
 [<ffffffff8035ae2b>] ? acpi_ns_get_node+0x92/0xa1
 [<ffffffff80444232>] ? printk+0x67/0x6d
 [<ffffffff8032c1cc>] ? pci_bus_write_config_byte+0x59/0x67
 [<ffffffffa00bc2d5>] ? ricoh_mmc_enable+0x13c/0x145 [ricoh_mmc]
 [<ffffffff80331894>] pci_legacy_suspend+0x7b/0xb8
 [<ffffffff803319c4>] pci_pm_suspend+0x34/0x86
 [<ffffffff8039929a>] pm_op+0x52/0xe5
 [<ffffffff80399844>] device_suspend+0x32e/0x453
 [<ffffffff8025f39e>] suspend_devices_and_enter+0x3e/0x12e
 [<ffffffff8025f5f6>] enter_state+0x110/0x164
 [<ffffffff8025f701>] state_store+0xb7/0xd7
 [<ffffffff8032069f>] kobj_attr_store+0x17/0x19
 [<ffffffff802e1de9>] sysfs_write_file+0xdf/0x114
 [<ffffffff8029723b>] vfs_write+0xa7/0xe1
 [<ffffffff80297339>] sys_write+0x47/0x6f
 [<ffffffff8020c25b>] system_call_fastpath+0x16/0x1b
---[ end trace 7b44d6d0be5818c2 ]---
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