Public bug reported:

[   51.501462] ------------[ cut here ]------------
[   51.501465] thunderbolt 0000:08:00.0: interrupt for TX ring 0 is already 
disabled
[   51.501480] WARNING: CPU: 4 PID: 82 at 
/build/linux-uQJ2um/linux-4.15.0/drivers/thunderbolt/nhi.c:106 
ring_interrupt_active+0x20c/0x270 [thunderbolt]
[   51.501481] Modules linked in: rfcomm ccm thunderbolt cmac bnep arc4 
snd_hda_codec_hdmi nls_iso8859_1 snd_hda_codec_realtek snd_hda_codec_generic 
hid_multitouch dell_wmi dell_laptop dell_smbios wmi_bmof intel_wmi_thunderbolt 
intel_rapl mxm_wmi x86_pkg_temp_thermal intel_powerclamp coretemp 
dell_wmi_descriptor dcdbas kvm_intel dell_smm_hwmon kvm irqbypass snd_hda_intel 
crct10dif_pclmul crc32_pclmul snd_hda_codec ghash_clmulni_intel snd_hda_core 
pcbc snd_hwdep snd_pcm ath10k_pci aesni_intel ath10k_core aes_x86_64 
crypto_simd glue_helper cryptd snd_seq_midi ath uvcvideo intel_cstate 
snd_seq_midi_event snd_rawmidi intel_rapl_perf mac80211 snd_seq 
videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 snd_seq_device snd_timer 
serio_raw videobuf2_core cdc_ether btusb usbnet videodev btrtl snd btbcm idma64 
btintel
[   51.501517]  r8152 virt_dma media soundcore joydev rtsx_pci_ms mii 
input_leds cfg80211 bluetooth memstick ecdh_generic mei_me intel_lpss_pci 
processor_thermal_device mei shpchp intel_soc_dts_iosf intel_lpss 
intel_pch_thermal nvidia_uvm(POE) int3400_thermal int3403_thermal 
int340x_thermal_zone wmi acpi_thermal_rel mac_hid intel_hid acpi_pad 
sparse_keymap sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables 
autofs4 hid_generic usbhid ses enclosure scsi_transport_sas uas usb_storage 
nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) i915 i2c_algo_bit 
drm_kms_helper syscopyarea sysfillrect sysimgblt rtsx_pci_sdmmc fb_sys_fops 
ahci nvme ipmi_devintf psmouse drm nvme_core rtsx_pci libahci ipmi_msghandler 
i2c_hid hid video
[   51.501552] CPU: 4 PID: 82 Comm: kworker/u16:1 Tainted: P        W  OE    
4.15.0-45-generic #48-Ubuntu
[   51.501553] Hardware name: Dell Inc. XPS 15 9560/05FFDN, BIOS 1.12.1 
10/02/2018
[   51.501556] Workqueue: kacpi_hotplug acpi_hotplug_work_fn
[   51.501561] RIP: 0010:ring_interrupt_active+0x20c/0x270 [thunderbolt]
[   51.501562] RSP: 0018:ffff9eb4c1befb38 EFLAGS: 00010082
[   51.501563] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000006
[   51.501564] RDX: 0000000000000007 RSI: 0000000000000092 RDI: ffff92e47e516490
[   51.501565] RBP: ffff9eb4c1befb70 R08: 0000000000000001 R09: 0000000000000529
[   51.501566] R10: 0000000000000040 R11: 0000000000000000 R12: ffffffffc1d90a1d
[   51.501567] R13: 0000000000038200 R14: ffff92e4641d3c00 R15: ffffffffc1d90a14
[   51.501568] FS:  0000000000000000(0000) GS:ffff92e47e500000(0000) 
knlGS:0000000000000000
[   51.501569] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   51.501570] CR2: 00001fbc9e7103f8 CR3: 000000002660a004 CR4: 00000000003606e0
[   51.501570] Call Trace:
[   51.501575]  tb_ring_stop+0x109/0x160 [thunderbolt]
[   51.501578]  tb_ctl_stop+0x45/0xc0 [thunderbolt]
[   51.501582]  tb_domain_remove+0x42/0x70 [thunderbolt]
[   51.501585]  nhi_remove+0x4b/0x60 [thunderbolt]
[   51.501588]  pci_device_remove+0x3e/0xb0
[   51.501590]  device_release_driver_internal+0x15b/0x240
[   51.501592]  device_release_driver+0x12/0x20
[   51.501594]  pci_stop_bus_device+0x7f/0xa0
[   51.501595]  pci_stop_and_remove_bus_device+0x12/0x20
[   51.501597]  trim_stale_devices+0x11d/0x150
[   51.501598]  trim_stale_devices+0xa9/0x150
[   51.501599]  trim_stale_devices+0xbb/0x150
[   51.501600]  ? get_slot_status+0xa2/0x100
[   51.501601]  acpiphp_check_bridge.part.7+0x100/0x140
[   51.501602]  acpiphp_hotplug_notify+0x18e/0x220
[   51.501603]  ? free_bridge+0x100/0x100
[   51.501605]  acpi_device_hotplug+0xa4/0x4b0
[   51.501607]  acpi_hotplug_work_fn+0x1e/0x30
[   51.501609]  process_one_work+0x1de/0x410
[   51.501610]  worker_thread+0x32/0x410
[   51.501612]  kthread+0x121/0x140
[   51.501613]  ? process_one_work+0x410/0x410
[   51.501615]  ? kthread_create_worker_on_cpu+0x70/0x70
[   51.501617]  ret_from_fork+0x35/0x40
[   51.501618] Code: 00 48 89 55 c8 44 89 45 d4 e8 21 a0 8c ee 44 8b 45 d4 48 
8b 55 c8 4d 89 f9 4c 89 e1 48 89 c6 48 c7 c7 38 12 d9 c1 e8 b4 d8 30 ee <0f> 0b 
e9 36 ff ff ff 41 0f b6 46 78 d3 e0 09 c7 e9 cd fe ff ff 
[   51.501644] ---[ end trace dbb8a6822d824854 ]---

** Affects: thunderbolt-tools (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1818228

Title:
  thunderbolt

Status in thunderbolt-tools package in Ubuntu:
  New

Bug description:
  [   51.501462] ------------[ cut here ]------------
  [   51.501465] thunderbolt 0000:08:00.0: interrupt for TX ring 0 is already 
disabled
  [   51.501480] WARNING: CPU: 4 PID: 82 at 
/build/linux-uQJ2um/linux-4.15.0/drivers/thunderbolt/nhi.c:106 
ring_interrupt_active+0x20c/0x270 [thunderbolt]
  [   51.501481] Modules linked in: rfcomm ccm thunderbolt cmac bnep arc4 
snd_hda_codec_hdmi nls_iso8859_1 snd_hda_codec_realtek snd_hda_codec_generic 
hid_multitouch dell_wmi dell_laptop dell_smbios wmi_bmof intel_wmi_thunderbolt 
intel_rapl mxm_wmi x86_pkg_temp_thermal intel_powerclamp coretemp 
dell_wmi_descriptor dcdbas kvm_intel dell_smm_hwmon kvm irqbypass snd_hda_intel 
crct10dif_pclmul crc32_pclmul snd_hda_codec ghash_clmulni_intel snd_hda_core 
pcbc snd_hwdep snd_pcm ath10k_pci aesni_intel ath10k_core aes_x86_64 
crypto_simd glue_helper cryptd snd_seq_midi ath uvcvideo intel_cstate 
snd_seq_midi_event snd_rawmidi intel_rapl_perf mac80211 snd_seq 
videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 snd_seq_device snd_timer 
serio_raw videobuf2_core cdc_ether btusb usbnet videodev btrtl snd btbcm idma64 
btintel
  [   51.501517]  r8152 virt_dma media soundcore joydev rtsx_pci_ms mii 
input_leds cfg80211 bluetooth memstick ecdh_generic mei_me intel_lpss_pci 
processor_thermal_device mei shpchp intel_soc_dts_iosf intel_lpss 
intel_pch_thermal nvidia_uvm(POE) int3400_thermal int3403_thermal 
int340x_thermal_zone wmi acpi_thermal_rel mac_hid intel_hid acpi_pad 
sparse_keymap sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables 
autofs4 hid_generic usbhid ses enclosure scsi_transport_sas uas usb_storage 
nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) i915 i2c_algo_bit 
drm_kms_helper syscopyarea sysfillrect sysimgblt rtsx_pci_sdmmc fb_sys_fops 
ahci nvme ipmi_devintf psmouse drm nvme_core rtsx_pci libahci ipmi_msghandler 
i2c_hid hid video
  [   51.501552] CPU: 4 PID: 82 Comm: kworker/u16:1 Tainted: P        W  OE    
4.15.0-45-generic #48-Ubuntu
  [   51.501553] Hardware name: Dell Inc. XPS 15 9560/05FFDN, BIOS 1.12.1 
10/02/2018
  [   51.501556] Workqueue: kacpi_hotplug acpi_hotplug_work_fn
  [   51.501561] RIP: 0010:ring_interrupt_active+0x20c/0x270 [thunderbolt]
  [   51.501562] RSP: 0018:ffff9eb4c1befb38 EFLAGS: 00010082
  [   51.501563] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 
0000000000000006
  [   51.501564] RDX: 0000000000000007 RSI: 0000000000000092 RDI: 
ffff92e47e516490
  [   51.501565] RBP: ffff9eb4c1befb70 R08: 0000000000000001 R09: 
0000000000000529
  [   51.501566] R10: 0000000000000040 R11: 0000000000000000 R12: 
ffffffffc1d90a1d
  [   51.501567] R13: 0000000000038200 R14: ffff92e4641d3c00 R15: 
ffffffffc1d90a14
  [   51.501568] FS:  0000000000000000(0000) GS:ffff92e47e500000(0000) 
knlGS:0000000000000000
  [   51.501569] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [   51.501570] CR2: 00001fbc9e7103f8 CR3: 000000002660a004 CR4: 
00000000003606e0
  [   51.501570] Call Trace:
  [   51.501575]  tb_ring_stop+0x109/0x160 [thunderbolt]
  [   51.501578]  tb_ctl_stop+0x45/0xc0 [thunderbolt]
  [   51.501582]  tb_domain_remove+0x42/0x70 [thunderbolt]
  [   51.501585]  nhi_remove+0x4b/0x60 [thunderbolt]
  [   51.501588]  pci_device_remove+0x3e/0xb0
  [   51.501590]  device_release_driver_internal+0x15b/0x240
  [   51.501592]  device_release_driver+0x12/0x20
  [   51.501594]  pci_stop_bus_device+0x7f/0xa0
  [   51.501595]  pci_stop_and_remove_bus_device+0x12/0x20
  [   51.501597]  trim_stale_devices+0x11d/0x150
  [   51.501598]  trim_stale_devices+0xa9/0x150
  [   51.501599]  trim_stale_devices+0xbb/0x150
  [   51.501600]  ? get_slot_status+0xa2/0x100
  [   51.501601]  acpiphp_check_bridge.part.7+0x100/0x140
  [   51.501602]  acpiphp_hotplug_notify+0x18e/0x220
  [   51.501603]  ? free_bridge+0x100/0x100
  [   51.501605]  acpi_device_hotplug+0xa4/0x4b0
  [   51.501607]  acpi_hotplug_work_fn+0x1e/0x30
  [   51.501609]  process_one_work+0x1de/0x410
  [   51.501610]  worker_thread+0x32/0x410
  [   51.501612]  kthread+0x121/0x140
  [   51.501613]  ? process_one_work+0x410/0x410
  [   51.501615]  ? kthread_create_worker_on_cpu+0x70/0x70
  [   51.501617]  ret_from_fork+0x35/0x40
  [   51.501618] Code: 00 48 89 55 c8 44 89 45 d4 e8 21 a0 8c ee 44 8b 45 d4 48 
8b 55 c8 4d 89 f9 4c 89 e1 48 89 c6 48 c7 c7 38 12 d9 c1 e8 b4 d8 30 ee <0f> 0b 
e9 36 ff ff ff 41 0f b6 46 78 d3 e0 09 c7 e9 cd fe ff ff 
  [   51.501644] ---[ end trace dbb8a6822d824854 ]---

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