> the kernel warnings do not happen either.
I spoke too soon. I saw those warnings again with kernel 3.16.0-29.39.
Therefore this bug cannot be reproduced at any time.
Dec 21 10:06:44 vougeot kernel: [ 340.419664] iwlwifi 0000:02:00.0: RF_KILL
bit toggled to disable radio.
Dec 21 10:06:44 vougeot kernel: [ 340.431512] ------------[ cut here
]------------
Dec 21 10:06:44 vougeot kernel: [ 340.431585] WARNING: CPU: 3 PID: 94 at
/build/buildd/linux-3.16.0/net/wireless/core.c:949
cfg80211_netdev_notifier_call+0x5b9/0x630 [cfg80211]()
Dec 21 10:06:44 vougeot kernel: [ 340.431593] Modules linked in: hid_generic
hidp hid ctr ccm dm_crypt btusb dell_wmi sparse_keymap snd_hda_codec_hdmi
rfcomm bnep arc4 snd_hda_codec_idt snd_hda_codec_generic dell_laptop dcdbas
bluetooth 6lowpan_iphc snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm
crct10dif_pclmul crc32_pclmul snd_pcm ghash_clmulni_intel iwlmvm mac80211
snd_seq_midi snd_seq_midi_event snd_rawmidi aesni_intel snd_seq aes_x86_64 lrw
gf128mul iwlwifi glue_helper ablk_helper cryptd joydev binfmt_misc serio_raw
cfg80211 snd_seq_device snd_timer lpc_ich snd shpchp soundcore dell_smo8800
mei_me mei mac_hid parport_pc ppdev tpm_rng lp parport btrfs xor raid6_pq i915
psmouse firewire_ohci ahci i2c_algo_bit libahci e1000e drm_kms_helper drm
sdhci_pci firewire_core sdhci ptp crc_itu_t pps_core wmi video
Dec 21 10:06:44 vougeot kernel: [ 340.431790] CPU: 3 PID: 94 Comm: kworker/3:1
Not tainted 3.16.0-29-generic #39-Ubuntu
Dec 21 10:06:44 vougeot kernel: [ 340.431797] Hardware name: Dell Inc.
Latitude E6520/0NVF5K, BIOS A19 11/14/2013
Dec 21 10:06:44 vougeot kernel: [ 340.431832] Workqueue: events
cfg80211_rfkill_sync_work [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.431839] 0000000000000009
ffff88021e5e7c28 ffffffff8178218a 0000000000000000
Dec 21 10:06:44 vougeot kernel: [ 340.431850] ffff88021e5e7c60
ffffffff8106fedd ffff88021d5268d0 ffff880220bf0260
Dec 21 10:06:44 vougeot kernel: [ 340.431865] 0000000000000002
ffff88021d526000 ffff880220bf0000 ffff88021e5e7c70
Dec 21 10:06:44 vougeot kernel: [ 340.431876] Call Trace:
Dec 21 10:06:44 vougeot kernel: [ 340.431899] [<ffffffff8178218a>]
dump_stack+0x45/0x56
Dec 21 10:06:44 vougeot kernel: [ 340.431913] [<ffffffff8106fedd>]
warn_slowpath_common+0x7d/0xa0
Dec 21 10:06:44 vougeot kernel: [ 340.431924] [<ffffffff8106ffba>]
warn_slowpath_null+0x1a/0x20
Dec 21 10:06:44 vougeot kernel: [ 340.431960] [<ffffffffc0456629>]
cfg80211_netdev_notifier_call+0x5b9/0x630 [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.431979] [<ffffffff810b92d4>] ?
__wake_up+0x44/0x50
Dec 21 10:06:44 vougeot kernel: [ 340.431992] [<ffffffff8166977a>] ?
sock_def_error_report+0x3a/0x60
Dec 21 10:06:44 vougeot kernel: [ 340.432006] [<ffffffff8109972d>]
notifier_call_chain+0x4d/0x70
Dec 21 10:06:44 vougeot kernel: [ 340.432022] [<ffffffff81099856>]
raw_notifier_call_chain+0x16/0x20
Dec 21 10:06:44 vougeot kernel: [ 340.432035] [<ffffffff8167b755>]
call_netdevice_notifiers_info+0x35/0x60
Dec 21 10:06:44 vougeot kernel: [ 340.432046] [<ffffffff8167baf8>]
dev_close_many+0xc8/0x120
Dec 21 10:06:44 vougeot kernel: [ 340.432063] [<ffffffff8167dcc6>]
dev_close.part.71+0x36/0x50
Dec 21 10:06:44 vougeot kernel: [ 340.432073] [<ffffffff8167dd01>]
dev_close+0x21/0x30
Dec 21 10:06:44 vougeot kernel: [ 340.432108] [<ffffffffc04558e5>]
cfg80211_shutdown_all_interfaces+0x45/0xc0 [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432142] [<ffffffffc045598b>]
cfg80211_rfkill_sync_work+0x2b/0x40 [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432153] [<ffffffff8108da32>]
process_one_work+0x182/0x4e0
Dec 21 10:06:44 vougeot kernel: [ 340.432162] [<ffffffff8108ddfb>]
worker_thread+0x6b/0x6a0
Dec 21 10:06:44 vougeot kernel: [ 340.432178] [<ffffffff81784e0d>] ?
__schedule+0x39d/0x890
Dec 21 10:06:44 vougeot kernel: [ 340.432187] [<ffffffff8108dd90>] ?
process_one_work+0x4e0/0x4e0
Dec 21 10:06:44 vougeot kernel: [ 340.432199] [<ffffffff81094c6b>]
kthread+0xdb/0x100
Dec 21 10:06:44 vougeot kernel: [ 340.432210] [<ffffffff81094b90>] ?
kthread_create_on_node+0x1c0/0x1c0
Dec 21 10:06:44 vougeot kernel: [ 340.432228] [<ffffffff8178a0fc>]
ret_from_fork+0x7c/0xb0
Dec 21 10:06:44 vougeot kernel: [ 340.432239] [<ffffffff81094b90>] ?
kthread_create_on_node+0x1c0/0x1c0
Dec 21 10:06:44 vougeot kernel: [ 340.432246] ---[ end trace 4b8b4bc277e5e82a
]---
Dec 21 10:06:44 vougeot kernel: [ 340.432259] ------------[ cut here
]------------
Dec 21 10:06:44 vougeot kernel: [ 340.432302] WARNING: CPU: 3 PID: 94 at
/build/buildd/linux-3.16.0/net/mac80211/driver-ops.h:12
ieee80211_request_sched_scan_stop+0x155/0x170 [mac80211]()
Dec 21 10:06:44 vougeot kernel: [ 340.432313] wlan1: Failed
check-sdata-in-driver check, flags: 0x4
Dec 21 10:06:44 vougeot kernel: [ 340.432317] Modules linked in: hid_generic
hidp hid ctr ccm dm_crypt btusb dell_wmi sparse_keymap snd_hda_codec_hdmi
rfcomm bnep arc4 snd_hda_codec_idt snd_hda_codec_generic dell_laptop dcdbas
bluetooth 6lowpan_iphc snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm
crct10dif_pclmul crc32_pclmul snd_pcm ghash_clmulni_intel iwlmvm mac80211
snd_seq_midi snd_seq_midi_event snd_rawmidi aesni_intel snd_seq aes_x86_64 lrw
gf128mul iwlwifi glue_helper ablk_helper cryptd joydev binfmt_misc serio_raw
cfg80211 snd_seq_device snd_timer lpc_ich snd shpchp soundcore dell_smo8800
mei_me mei mac_hid parport_pc ppdev tpm_rng lp parport btrfs xor raid6_pq i915
psmouse firewire_ohci ahci i2c_algo_bit libahci e1000e drm_kms_helper drm
sdhci_pci firewire_core sdhci ptp crc_itu_t pps_core wmi video
Dec 21 10:06:44 vougeot kernel: [ 340.432508] CPU: 3 PID: 94 Comm: kworker/3:1
Tainted: G W 3.16.0-29-generic #39-Ubuntu
Dec 21 10:06:44 vougeot kernel: [ 340.432514] Hardware name: Dell Inc.
Latitude E6520/0NVF5K, BIOS A19 11/14/2013
Dec 21 10:06:44 vougeot kernel: [ 340.432545] Workqueue: events
cfg80211_rfkill_sync_work [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432550] 0000000000000009
ffff88021e5e7b58 ffffffff8178218a ffff88021e5e7ba0
Dec 21 10:06:44 vougeot kernel: [ 340.432560] ffff88021e5e7b90
ffffffff8106fedd 0000000000000000 ffff880220bf0680
Dec 21 10:06:44 vougeot kernel: [ 340.432569] ffff880220bf13b8
00000000fffffffb ffff88021d5268c0 ffff88021e5e7bf0
Dec 21 10:06:44 vougeot kernel: [ 340.432585] Call Trace:
Dec 21 10:06:44 vougeot kernel: [ 340.432597] [<ffffffff8178218a>]
dump_stack+0x45/0x56
Dec 21 10:06:44 vougeot kernel: [ 340.432607] [<ffffffff8106fedd>]
warn_slowpath_common+0x7d/0xa0
Dec 21 10:06:44 vougeot kernel: [ 340.432624] [<ffffffff8106ff4c>]
warn_slowpath_fmt+0x4c/0x50
Dec 21 10:06:44 vougeot kernel: [ 340.432636] [<ffffffff8177e4cf>] ?
printk+0x63/0x6b
Dec 21 10:06:44 vougeot kernel: [ 340.432674] [<ffffffffc05bb7d5>]
ieee80211_request_sched_scan_stop+0x155/0x170 [mac80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432718] [<ffffffffc05cae5d>]
ieee80211_sched_scan_stop+0x2d/0x40 [mac80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432758] [<ffffffffc045fe38>]
__cfg80211_stop_sched_scan+0x58/0x130 [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432793] [<ffffffffc0456633>]
cfg80211_netdev_notifier_call+0x5c3/0x630 [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432804] [<ffffffff810b92d4>] ?
__wake_up+0x44/0x50
Dec 21 10:06:44 vougeot kernel: [ 340.432821] [<ffffffff8166977a>] ?
sock_def_error_report+0x3a/0x60
Dec 21 10:06:44 vougeot kernel: [ 340.432833] [<ffffffff8109972d>]
notifier_call_chain+0x4d/0x70
Dec 21 10:06:44 vougeot kernel: [ 340.432842] [<ffffffff81099856>]
raw_notifier_call_chain+0x16/0x20
Dec 21 10:06:44 vougeot kernel: [ 340.432853] [<ffffffff8167b755>]
call_netdevice_notifiers_info+0x35/0x60
Dec 21 10:06:44 vougeot kernel: [ 340.432869] [<ffffffff8167baf8>]
dev_close_many+0xc8/0x120
Dec 21 10:06:44 vougeot kernel: [ 340.432880] [<ffffffff8167dcc6>]
dev_close.part.71+0x36/0x50
Dec 21 10:06:44 vougeot kernel: [ 340.432890] [<ffffffff8167dd01>]
dev_close+0x21/0x30
Dec 21 10:06:44 vougeot kernel: [ 340.432924] [<ffffffffc04558e5>]
cfg80211_shutdown_all_interfaces+0x45/0xc0 [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432957] [<ffffffffc045598b>]
cfg80211_rfkill_sync_work+0x2b/0x40 [cfg80211]
Dec 21 10:06:44 vougeot kernel: [ 340.432967] [<ffffffff8108da32>]
process_one_work+0x182/0x4e0
Dec 21 10:06:44 vougeot kernel: [ 340.432982] [<ffffffff8108ddfb>]
worker_thread+0x6b/0x6a0
Dec 21 10:06:44 vougeot kernel: [ 340.432991] [<ffffffff81784e0d>] ?
__schedule+0x39d/0x890
Dec 21 10:06:44 vougeot kernel: [ 340.433000] [<ffffffff8108dd90>] ?
process_one_work+0x4e0/0x4e0
Dec 21 10:06:44 vougeot kernel: [ 340.433011] [<ffffffff81094c6b>]
kthread+0xdb/0x100
Dec 21 10:06:44 vougeot kernel: [ 340.433028] [<ffffffff81094b90>] ?
kthread_create_on_node+0x1c0/0x1c0
Dec 21 10:06:44 vougeot kernel: [ 340.433038] [<ffffffff8178a0fc>]
ret_from_fork+0x7c/0xb0
Dec 21 10:06:44 vougeot kernel: [ 340.433049] [<ffffffff81094b90>] ?
kthread_create_on_node+0x1c0/0x1c0
Dec 21 10:06:44 vougeot kernel: [ 340.433055] ---[ end trace 4b8b4bc277e5e82b
]---
** Changed in: linux (Ubuntu)
Status: Fix Released => Confirmed
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https://bugs.launchpad.net/bugs/1401624
Title:
kernel WARNINGs when disabling WiFi with RF kill switch on Intel chip
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