Oops on 4.15-rc[123] on shutdown/reboot

From: Chris Clayton
Date: Mon Dec 11 2017 - 10:31:32 EST

I've been getting an oops when shutting down my laptop (with /sbin/halt) or rebooting it (/sbin/reboot or
/usr/sbin/kexec). Unfortunately, I can't provide the backtrace because it is on the screen for only a moment before the
system shuts down/reboots.

I have however, bisected it and the outcome is:

cc27b735ad3a75574a6ab1a66ed6b09385e77e5e is the first bad commit
commit cc27b735ad3a75574a6ab1a66ed6b09385e77e5e
Author: Sinan Kaya <okaya@xxxxxxxxxxxxxx>
Date: Wed Oct 25 15:01:02 2017 -0400

PCI/portdrv: Turn off PCIe services during shutdown

Some of the PCIe services such as AER are being left enabled during
shutdown. This might cause spurious AER errors while SOC is being powered
down.

Clean up the PCIe services gracefully during shutdown to clear these false
positives.

Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>

:040000 040000 5a827d6956c581344a0bf392e30155c337673c1d 76c6a39b53604a0a0a370383c3503f80aa7cbc1e M drivers

I'm confident that this is the correct outcome because a kernel built with the preceding commit
(6018182d3158505f11103adaee8ffb53424df986) does not oops. Nor does -rc3 with the patch reversed.

I'm more than happy to provide additional diagnostics and test proposed fixes. As a starter for ten, I've attached the
output from 'lspci -v'. If, however, you need to see the backtrace, I'll need some advice on how to capture that.

Chris

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
Subsystem: CLEVO/KAPOK Computer Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller
Flags: bus master, fast devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=0c <?>

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 16
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: None
Memory behind bridge: None
Prefetchable memory behind bridge: None
Capabilities: [88] Subsystem: CLEVO/KAPOK Computer Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller
Capabilities: [80] Power Management version 3
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [a0] Express Root Port (Slot+), MSI 00
Kernel driver in use: pcieport

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
Subsystem: CLEVO/KAPOK Computer 4th Gen Core Processor Integrated Graphics Controller
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915

00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
Subsystem: CLEVO/KAPOK Computer Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at f7f14000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05) (prog-if 30 [XHCI])
Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family USB xHCI
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f7f00000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [70] Power Management version 2
Capabilities: [80] MSI: Enable- Count=1/8 Maskable- 64bit+
Kernel driver in use: xhci_hcd

00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family MEI Controller
Flags: bus master, fast devsel, latency 0, IRQ 11
Memory at f7f1e000 (64-bit, non-prefetchable) [size=16]
Capabilities: [50] Power Management version 3
Capabilities: [8c] MSI: Enable- Count=1/1 Maskable- 64bit+

00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05) (prog-if 20 [EHCI])
Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family USB EHCI
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f7f1c000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci-pci

00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset High Definition Audio Controller
Flags: bus master, fast devsel, latency 0, IRQ 22
Memory at f7f10000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 16
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: None
Memory behind bridge: None
Prefetchable memory behind bridge: None
Capabilities: [40] Express Root Port (Slot-), MSI 00
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family PCI Express Root Port
Capabilities: [a0] Power Management version 3
Kernel driver in use: pcieport

00:1c.1 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #2 (rev d5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 17
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: None
Memory behind bridge: f7e00000-f7efffff [size=1M]
Prefetchable memory behind bridge: None
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family PCI Express Root Port
Capabilities: [a0] Power Management version 3
Kernel driver in use: pcieport

00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 18
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
I/O behind bridge: None
Memory behind bridge: f7d00000-f7dfffff [size=1M]
Prefetchable memory behind bridge: None
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family PCI Express Root Port
Capabilities: [a0] Power Management version 3
Kernel driver in use: pcieport

00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 19
Bus: primary=00, secondary=05, subordinate=05, sec-latency=0
I/O behind bridge: 0000e000-0000efff [size=4K]
Memory behind bridge: f7c00000-f7cfffff [size=1M]
Prefetchable memory behind bridge: 00000000f0000000-00000000f00fffff [size=1M]
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family PCI Express Root Port
Capabilities: [a0] Power Management version 3
Kernel driver in use: pcieport

00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05) (prog-if 20 [EHCI])
Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family USB EHCI
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f7f1b000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci-pci

00:1f.0 ISA bridge: Intel Corporation HM86 Express LPC Controller (rev 05)
Subsystem: CLEVO/KAPOK Computer HM86 Express LPC Controller
Flags: bus master, medium devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=0c <?>

00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05) (prog-if 01 [AHCI 1.0])
Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode]
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19
I/O ports at f0b0 [size=8]
I/O ports at f0a0 [size=4]
I/O ports at f090 [size=8]
I/O ports at f080 [size=4]
I/O ports at f060 [size=32]
Memory at f7f1a000 (32-bit, non-prefetchable) [size=2K]
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [70] Power Management version 3
Capabilities: [a8] SATA HBA v1.0
Kernel driver in use: ahci

00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
Subsystem: CLEVO/KAPOK Computer 8 Series/C220 Series Chipset Family SMBus Controller
Flags: medium devsel, IRQ 18
Memory at f7f19000 (64-bit, non-prefetchable) [size=256]
I/O ports at f040 [size=32]
Kernel driver in use: i801_smbus

03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader (rev 01)
Subsystem: CLEVO/KAPOK Computer RTS5229 PCI Express Card Reader
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at f7e00000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Kernel driver in use: rtsx_pci

04:00.0 Network controller: Intel Corporation Wireless 7260 (rev c3)
Subsystem: Intel Corporation Wireless-N 7260
Flags: bus master, fast devsel, latency 0, IRQ 4
Memory at f7d00000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [40] Express Endpoint, MSI 00
Kernel modules: iwlwifi

05:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTL8411 PCI Express Card Reader (rev 01)
Subsystem: CLEVO/KAPOK Computer RTL8411 PCI Express Card Reader
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at f7c00000 (32-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [b0] MSI-X: Enable- Count=1 Masked-
Capabilities: [d0] Vital Product Data
Kernel driver in use: rtsx_pci

05:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0a)
Subsystem: CLEVO/KAPOK Computer RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
Flags: bus master, fast devsel, latency 0, IRQ 19
I/O ports at e000 [size=256]
Memory at f0004000 (64-bit, prefetchable) [size=4K]
Memory at f0000000 (64-bit, prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 01
Capabilities: [b0] MSI-X: Enable- Count=4 Masked-
Capabilities: [d0] Vital Product Data
Kernel driver in use: r8169
Kernel modules: r8169