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[Launchpad Bug Tracker <1401624@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1401624

Title:
  kernel WARNINGs when disabling WiFi with RF kill switch on Intel chip

Status in linux package in Ubuntu:
  Expired

Bug description:
  I have a laptop with this WiFi controller:

  02:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b)
          Subsystem: Intel Corporation Dual Band Wireless-AC 7260
          Flags: bus master, fast devsel, latency 0, IRQ 47
          Memory at e2d00000 (64-bit, non-prefetchable) [size=8K]
          Capabilities: <access denied>
          Kernel driver in use: iwlwifi

  I switched WiFi off with the RF kill switch and got those errors:

  [19011.796623] iwlwifi 0000:02:00.0: RF_KILL bit toggled to disable radio.
  [19011.797807] ------------[ cut here ]------------
  [19011.797848] WARNING: CPU: 1 PID: 6870 at /build/buildd/linux-3.16.0/net/wireless/core.c:949 cfg80211_netdev_notifier_call+0x5b9/0x630 [cfg80211]()
  [19011.797853] Modules linked in: ses enclosure uas usb_storage dm_crypt btusb arc4 dell_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel iwlmvm kvm mac80211 dell_laptop dcdbas crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd iwlwifi snd_hda_codec_hdmi joydev snd_hda_codec_idt serio_raw snd_hda_codec_generic bnep cfg80211 lpc_ich dell_smo8800 rfcomm bluetooth 6lowpan_iphc snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd mei_me mac_hid shpchp mei soundcore binfmt_misc parport_pc ppdev tpm_rng lp parport btrfs xor raid6_pq hid_generic usbhid hid i915 firewire_ohci i2c_algo_bit sdhci_pci sdhci psmouse firewire_core
  [19011.797964]  ahci e1000e libahci drm_kms_helper drm ptp crc_itu_t pps_core wmi video
  [19011.797980] CPU: 1 PID: 6870 Comm: kworker/1:1 Not tainted 3.16.0-28-generic #37-Ubuntu
  [19011.797983] Hardware name: Dell Inc. Latitude E6520/0NVF5K, BIOS A19 11/14/2013
  [19011.797999] Workqueue: events cfg80211_rfkill_sync_work [cfg80211]
  [19011.798003]  0000000000000009 ffff8801b3c47c28 ffffffff81781e6a 0000000000000000
  [19011.798008]  ffff8801b3c47c60 ffffffff8106fedd ffff88022136a8d0 ffff880035adc260
  [19011.798013]  0000000000000002 ffff88022136a000 ffff880035adc000 ffff8801b3c47c70
  [19011.798018] Call Trace:
  [19011.798030]  [<ffffffff81781e6a>] dump_stack+0x45/0x56
  [19011.798038]  [<ffffffff8106fedd>] warn_slowpath_common+0x7d/0xa0
  [19011.798044]  [<ffffffff8106ffba>] warn_slowpath_null+0x1a/0x20
  [19011.798060]  [<ffffffffc052f629>] cfg80211_netdev_notifier_call+0x5b9/0x630 [cfg80211]
  [19011.798068]  [<ffffffff8167acab>] ? __dev_remove_pack+0x8b/0xb0
  [19011.798075]  [<ffffffff81761cbc>] ? __unregister_prot_hook+0xcc/0xd0
  [19011.798082]  [<ffffffff8109972d>] notifier_call_chain+0x4d/0x70
  [19011.798087]  [<ffffffff81099856>] raw_notifier_call_chain+0x16/0x20
  [19011.798093]  [<ffffffff8167b4d5>] call_netdevice_notifiers_info+0x35/0x60
  [19011.798099]  [<ffffffff8167b878>] dev_close_many+0xc8/0x120
  [19011.798105]  [<ffffffff8167da46>] dev_close.part.71+0x36/0x50
  [19011.798110]  [<ffffffff8167da81>] dev_close+0x21/0x30
  [19011.798125]  [<ffffffffc052e8e5>] cfg80211_shutdown_all_interfaces+0x45/0xc0 [cfg80211]
  [19011.798140]  [<ffffffffc052e98b>] cfg80211_rfkill_sync_work+0x2b/0x40 [cfg80211]
  [19011.798146]  [<ffffffff8108da32>] process_one_work+0x182/0x4e0
  [19011.798151]  [<ffffffff8108ddfb>] worker_thread+0x6b/0x6a0
  [19011.798156]  [<ffffffff8108dd90>] ? process_one_work+0x4e0/0x4e0
  [19011.798162]  [<ffffffff81094c6b>] kthread+0xdb/0x100
  [19011.798168]  [<ffffffff81094b90>] ? kthread_create_on_node+0x1c0/0x1c0
  [19011.798175]  [<ffffffff81789dfc>] ret_from_fork+0x7c/0xb0
  [19011.798181]  [<ffffffff81094b90>] ? kthread_create_on_node+0x1c0/0x1c0
  [19011.798184] ---[ end trace 9074ade8075c79de ]---
  [19011.798187] ------------[ cut here ]------------
  [19011.798210] WARNING: CPU: 1 PID: 6870 at /build/buildd/linux-3.16.0/net/mac80211/driver-ops.h:12 ieee80211_request_sched_scan_stop+0x155/0x170 [mac80211]()
  [19011.798213] wlan1:  Failed check-sdata-in-driver check, flags: 0x0
  [19011.798214] Modules linked in: ses enclosure uas usb_storage dm_crypt btusb arc4 dell_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel iwlmvm kvm mac80211 dell_laptop dcdbas crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd iwlwifi snd_hda_codec_hdmi joydev snd_hda_codec_idt serio_raw snd_hda_codec_generic bnep cfg80211 lpc_ich dell_smo8800 rfcomm bluetooth 6lowpan_iphc snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd mei_me mac_hid shpchp mei soundcore binfmt_misc parport_pc ppdev tpm_rng lp parport btrfs xor raid6_pq hid_generic usbhid hid i915 firewire_ohci i2c_algo_bit sdhci_pci sdhci psmouse firewire_core
  [19011.798283]  ahci e1000e libahci drm_kms_helper drm ptp crc_itu_t pps_core wmi video
  [19011.798295] CPU: 1 PID: 6870 Comm: kworker/1:1 Tainted: G        W     3.16.0-28-generic #37-Ubuntu
  [19011.798298] Hardware name: Dell Inc. Latitude E6520/0NVF5K, BIOS A19 11/14/2013
  [19011.798312] Workqueue: events cfg80211_rfkill_sync_work [cfg80211]
  [19011.798314]  0000000000000009 ffff8801b3c47b58 ffffffff81781e6a ffff8801b3c47ba0
  [19011.798319]  ffff8801b3c47b90 ffffffff8106fedd 0000000000000000 ffff880035adc680
  [19011.798326]  ffff880035add3b8 00000000fffffffb ffff88022136a8c0 ffff8801b3c47bf0
  [19011.798333] Call Trace:
  [19011.798341]  [<ffffffff81781e6a>] dump_stack+0x45/0x56
  [19011.798350]  [<ffffffff8106fedd>] warn_slowpath_common+0x7d/0xa0
  [19011.798357]  [<ffffffff8106ff4c>] warn_slowpath_fmt+0x4c/0x50
  [19011.798365]  [<ffffffff8177e1af>] ? printk+0x63/0x6b
  [19011.798386]  [<ffffffffc06b17d5>] ieee80211_request_sched_scan_stop+0x155/0x170 [mac80211]
  [19011.798412]  [<ffffffffc06c0e4d>] ieee80211_sched_scan_stop+0x2d/0x40 [mac80211]
  [19011.798440]  [<ffffffffc0538e38>] __cfg80211_stop_sched_scan+0x58/0x130 [cfg80211]
  [19011.798459]  [<ffffffffc052f633>] cfg80211_netdev_notifier_call+0x5c3/0x630 [cfg80211]
  [19011.798465]  [<ffffffff8167acab>] ? __dev_remove_pack+0x8b/0xb0
  [19011.798471]  [<ffffffff81761cbc>] ? __unregister_prot_hook+0xcc/0xd0
  [19011.798477]  [<ffffffff8109972d>] notifier_call_chain+0x4d/0x70
  [19011.798482]  [<ffffffff81099856>] raw_notifier_call_chain+0x16/0x20
  [19011.798532]  [<ffffffff8167b4d5>] call_netdevice_notifiers_info+0x35/0x60
  [19011.798551]  [<ffffffff8167b878>] dev_close_many+0xc8/0x120
  [19011.798558]  [<ffffffff8167da46>] dev_close.part.71+0x36/0x50
  [19011.798566]  [<ffffffff8167da81>] dev_close+0x21/0x30
  [19011.798587]  [<ffffffffc052e8e5>] cfg80211_shutdown_all_interfaces+0x45/0xc0 [cfg80211]
  [19011.798607]  [<ffffffffc052e98b>] cfg80211_rfkill_sync_work+0x2b/0x40 [cfg80211]
  [19011.798614]  [<ffffffff8108da32>] process_one_work+0x182/0x4e0
  [19011.798620]  [<ffffffff8108ddfb>] worker_thread+0x6b/0x6a0
  [19011.798627]  [<ffffffff8108dd90>] ? process_one_work+0x4e0/0x4e0
  [19011.798634]  [<ffffffff81094c6b>] kthread+0xdb/0x100
  [19011.798643]  [<ffffffff81094b90>] ? kthread_create_on_node+0x1c0/0x1c0
  [19011.798650]  [<ffffffff81789dfc>] ret_from_fork+0x7c/0xb0
  [19011.798658]  [<ffffffff81094b90>] ? kthread_create_on_node+0x1c0/0x1c0
  [19011.798663] ---[ end trace 9074ade8075c79df ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-28-generic 3.16.0-28.37
  ProcVersionSignature: Ubuntu 3.16.0-28.37-generic 3.16.7-ckt1
  Uname: Linux 3.16.0-28-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  bonnaudl   3477 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Thu Dec 11 18:55:50 2014
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=cf81afe7-8427-45fa-9149-c11d060a5a26
  MachineType: Dell Inc. Latitude E6520
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic root=UUID=749a9901-bdd3-4b5f-b80e-69414667e058 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-28-generic N/A
   linux-backports-modules-3.16.0-28-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/14/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A19
  dmi.board.name: 0NVF5K
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA19:bd11/14/2013:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0NVF5K:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6520
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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