Patchwork linux-3.7.10: 'nousb' causes repeated PME# enabled/disabled messages when 'pcie_aspm=off' and causes only partial acpiphp hotplug detection

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Submitter Martin Mokrejs
Date March 12, 2013, 1:32 p.m.
Message ID <513F2E5B.5090301@fold.natur.cuni.cz>
Download mbox | patch
Permalink /patch/227025/
State Not Applicable
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Martin Mokrejs - March 12, 2013, 1:32 p.m.
Martin Mokrejs wrote:
> Martin Mokrejs wrote:
>> Hi,
>>   I booted same kernel under same BIOS settings with the only difference that
>> in the latter case I added 'nousb'. While inspecting the diffs in dmesg outputs
>> I see that something is happening with my network card and 
>>
>> +r8169 0000:05:00.0: PME# disabled
>> +r8169 0000:05:00.0: PME# enabled
>> +r8169 0000:05:00.0: PME# disabled
>>
>> but also with SandyBridge PCI Express Root Port 5
>>
>> +pcieport 0000:00:1c.4: PME# enabled
>> +pcieport 0000:00:1c.4: PME# disabled
>> +pcieport 0000:00:1c.4: PME# enabled
>> +pcieport 0000:00:1c.4: PME# disabled
>> +pcieport 0000:00:1c.4: PME# enabled
>> +pcieport 0000:00:1c.4: PME# disabled
>> +pcieport 0000:00:1c.4: PME# enabled
>> +pcieport 0000:00:1c.4: PME# disabled
>> +pcieport 0000:00:1c.4: PME# enabled
>> +pcieport 0000:00:1c.4: PME# disabled
>> +pcieport 0000:00:1c.4: PME# enabled
>> +pcieport 0000:00:1c.4: PME# disabled
>>
>> The pcieport messages are repeating every second, until forever, funny. This is probably related
>> to the 'pcie_aspm=off' on kernel commandline, but so far it was necessary to get acpiphp working
>> on kernels above 3.5.
>>
>>
>> Could that be related some udev or other userspace tool misbehaving when
>> there is no USB available? Or is that a purely kernel driver issue?
>>
>>
>>
>> 00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5) (prog-if 00 [Normal decode])
>>         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
>>         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
>>         Latency: 0, Cache Line Size: 64 bytes
>>         Bus: primary=00, secondary=0b, subordinate=0c, sec-latency=0
>>         I/O behind bridge: 0000f000-00000fff
>>         Memory behind bridge: f7d00000-f7dfffff
>>         Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
>>         Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
>>         BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
>>                 PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
>>         Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
>>                 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
>>                         ExtTag- RBE+ FLReset-
>>                 DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
>>                         RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
>>                         MaxPayload 128 bytes, MaxReadReq 128 bytes
>>                 DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
>>                 LnkCap: Port #5, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <16us
>>                         ClockPM- Surprise- LLActRep+ BwNot-
>>                 LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+
>>                         ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
>>                 LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt+
>>                 SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
>>                         Slot #4, PowerLimit 10.000W; Interlock- NoCompl+
>>                 SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
>>                         Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
>>                 SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock-
>>                         Changed: MRL- PresDet- LinkState+
>>                 RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
>>                 RootCap: CRSVisible-
>>                 RootSta: PME ReqID 0000, PMEStatus- PMEPending-
>>                 DevCap2: Completion Timeout: Range BC, TimeoutDis+, LTR-, OBFF Not Supported ARIFwd-
>>                 DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled ARIFwd-
>>                 LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
>>                          Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
>>                          Compliance De-emphasis: -6dB
>>                 LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1-
>>                          EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
>>         Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
>>                 Address: 00000000  Data: 0000
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>>                 Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>> 00: 86 80 18 1c 07 00 10 00 b5 00 04 06 10 00 81 00
>> 10: 00 00 00 00 00 00 00 00 00 0b 0c 00 f0 00 00 20
>> 20: d0 f7 d0 f7 f1 ff 01 00 00 00 00 00 00 00 00 00
>> 30: 00 00 00 00 40 00 00 00 00 00 00 00 0b 01 10 00
>> 40: 10 80 42 01 00 80 00 00 00 00 10 00 12 3c 12 05
>> 50: 42 00 12 f0 00 b2 24 00 00 00 40 01 00 00 00 00
>> 60: 00 00 00 00 16 00 00 00 00 00 00 00 00 00 00 00
>> 70: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> 80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> 90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
>> a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
>> b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> d0: 00 00 00 01 02 0b 00 00 00 80 11 81 00 00 00 00
>> e0: 00 3f 00 00 00 00 00 00 01 00 00 00 00 00 00 00
>> f0: 00 00 00 00 00 00 00 00 87 0f 05 08 00 00 00 00
>>
>>
>> Although per dmesg the PME# changes happened every second, I managed to catch the
>> following difference by lspci only twice or three time sonly. But hope this is what
>> the dmesg line is about. The funny thing is that this PME# game is ongoing whether
>> the express slot is occupied by a card or not. Well, it is about the root port, so why
>> not? ;-)
>> Initially I cold-booted with a card inserted into the slot but some driver did not
>> realize the card is ejected. But per lspci I can confirm the device 11.00.0 was
>> recognized as removed from the slot. But why is the 00.1c.4 being modified I do not
>> know.
>>
>> Below is the PME# change bacjk and forth immediately.
>>
>> --- lspci_loop.23:45:01 2013-03-11 23:45:01.000000000 +0100
>> +++ lspci_loop.23:45:02 2013-03-11 23:45:02.000000000 +0100
>> @@ -410,7 +410,7 @@
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>> -               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>> +               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>>  00: 86 80 18 1c 07 00 10 00 b5 00 04 06 10 00 81 00
>>  10: 00 00 00 00 00 00 00 00 00 0b 0c 00 f0 00 00 20
>> @@ -422,7 +422,7 @@
>>  70: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
>> -a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
>> +a0: 01 00 02 c8 00 00 00 00 00 00 00 00 00 00 00 00
>>  b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  d0: 00 00 00 01 02 0b 00 00 00 80 11 81 00 00 00 00
>> --- lspci_loop.23:45:02 2013-03-11 23:45:02.000000000 +0100
>> +++ lspci_loop.23:45:03 2013-03-11 23:45:03.000000000 +0100
>> @@ -410,7 +410,7 @@
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>> -               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>> +               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>>  00: 86 80 18 1c 07 00 10 00 b5 00 04 06 10 00 81 00
>>  10: 00 00 00 00 00 00 00 00 00 0b 0c 00 f0 00 00 20
>> @@ -422,7 +422,7 @@
>>  70: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
>> -a0: 01 00 02 c8 00 00 00 00 00 00 00 00 00 00 00 00
>> +a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
>>  b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  d0: 00 00 00 01 02 0b 00 00 00 80 11 81 00 00 00 00
>>
>>
>> and more than a minute later another example
>>
>>
>> # diff -u -w lspci_loop.23:46:44 lspci_loop.23:46:45
>> --- lspci_loop.23:46:44 2013-03-11 23:46:44.000000000 +0100
>> +++ lspci_loop.23:46:45 2013-03-11 23:46:45.000000000 +0100
>> @@ -410,7 +410,7 @@
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>> -               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>> +               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>>  00: 86 80 18 1c 07 00 10 00 b5 00 04 06 10 00 81 00
>>  10: 00 00 00 00 00 00 00 00 00 0b 0c 00 f0 00 00 20
>> @@ -422,7 +422,7 @@
>>  70: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
>> -a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
>> +a0: 01 00 02 c8 00 00 00 00 00 00 00 00 00 00 00 00
>>  b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  d0: 00 00 00 01 02 0b 00 00 00 80 11 81 00 00 00 00
>> # diff -u -w lspci_loop.23:46:45 lspci_loop.23:46:46
>> --- lspci_loop.23:46:45 2013-03-11 23:46:45.000000000 +0100
>> +++ lspci_loop.23:46:46 2013-03-11 23:46:46.000000000 +0100
>> @@ -410,7 +410,7 @@
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>> -               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>> +               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>>  00: 86 80 18 1c 07 00 10 00 b5 00 04 06 10 00 81 00
>>  10: 00 00 00 00 00 00 00 00 00 0b 0c 00 f0 00 00 20
>> @@ -422,7 +422,7 @@
>>  70: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
>> -a0: 01 00 02 c8 00 00 00 00 00 00 00 00 00 00 00 00
>> +a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
>>  b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  d0: 00 00 00 01 02 0b 00 00 00 80 11 81 00 00 00 00
> 
> The above do not happen on a system cold-booted with an empty express card slot.
> 
>>
>>
>> The first pair of PME changes happened while the Firewire card was still cold-plugged in
>> the slot. The latter happened when the card was inserted back into the slot
>> but that has been only partially noticed by pcihp hotplug (read further below). Under
>> this BIOS+'nousb' setup the *acpiphp* hotplug does not work with this particular Firewire
>> OHCI card, or really badly.
>>
>>
>> Lets abstract away from the above PME# stuff and see how the system behaved during
>> eject of the cold-plugged card and what a partial detection happened on its later
>> hotplug insert, eject, insert. I will show intereleaved in the text the slot status
>> numbers as reported by lspci whenever they changed. The command is:
>>
>> while true; do echo -n "$(date +%T) SlotStatus "; setpci -s1c.7 0x5a.w; sleep 1; done
>>
>>
>> 23:45:21 SlotStatus 0040
>> 23:45:22 SlotStatus 0040
>> 23:45:23 SlotStatus 0040
>> 23:45:25 SlotStatus 0040
>> 23:45:26 SlotStatus 0040
>> 23:45:27 SlotStatus 0040
>> 23:45:28 SlotStatus 0108
>> 23:45:29 SlotStatus 0100
>> 23:45:30 SlotStatus 0100
>> 23:45:31 SlotStatus 0100
>> 23:45:32 SlotStatus 0100
>>
>> --- lspci_loop.23:45:27 2013-03-11 23:45:27.000000000 +0100
>> +++ lspci_loop.23:45:28 2013-03-11 23:45:28.000000000 +0100
>> @@ -437,7 +437,7 @@
>>         I/O behind bridge: 0000c000-0000dfff
>>         Memory behind bridge: f6c00000-f7cfffff
>>         Prefetchable memory behind bridge: 00000000f0000000-00000000f10fffff
>> -       Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
>> +       Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
>>         BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
>>                 PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
>>         Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
>> @@ -446,18 +446,18 @@
>>                 DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
>>                         RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
>>                         MaxPayload 128 bytes, MaxReadReq 128 bytes
>> -               DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
>> +               DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
>>                 LnkCap: Port #8, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <1us, L1 <16us
>>                         ClockPM- Surprise- LLActRep+ BwNot-
>>                 LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
>>                         ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
>> -               LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt-
>> +               LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt+ ABWMgmt-
>>                 SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+
>>                         Slot #7, PowerLimit 10.000W; Interlock- NoCompl+
>>                 SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
>>                         Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
>> -               SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock-
>> -                       Changed: MRL- PresDet- LinkState-
>> +               SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
>> +                       Changed: MRL- PresDet- LinkState+
>>                 RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
>>                 RootCap: CRSVisible-
>>                 RootSta: PME ReqID 0000, PMEStatus- PMEPending-
>> @@ -473,19 +473,19 @@
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>> -               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>> +               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>>  00: 86 80 1e 1c 07 00 10 00 b5 00 04 06 10 00 81 00
>> -10: 00 00 00 00 00 00 00 00 00 11 16 00 c0 d0 00 00
>> +10: 00 00 00 00 00 00 00 00 00 11 16 00 c0 d0 00 20
>>  20: c0 f6 c0 f7 01 f0 01 f1 00 00 00 00 00 00 00 00
>>  30: 00 00 00 00 40 00 00 00 00 00 00 00 0a 04 10 00
>> -40: 10 80 42 01 00 80 00 00 00 00 10 00 12 4c 12 08
>> -50: 00 00 11 70 60 b2 3c 00 00 00 40 00 00 00 00 00
>> +40: 10 80 42 01 00 80 00 00 00 00 11 00 12 4c 12 08
>> +50: 00 00 11 50 60 b2 3c 00 00 00 00 01 00 00 00 00
>>  60: 00 00 00 00 16 00 00 00 00 00 00 00 00 00 00 00
>>  70: 01 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
>> -a0: 01 00 02 c8 00 00 00 00 00 00 00 00 00 00 00 00
>> +a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
>>  b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  d0: 00 00 00 01 02 0b 00 00 02 80 11 c1 00 00 00 00
>> @@ -793,56 +793,3 @@
>>  e0: 00 00 40 63 00 00 00 00 00 00 00 00 00 00 00 00
>>  f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  
>> -11:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series Firewire Controller (rev 01) (prog-if 10 [OHCI])
>> -       Subsystem: VIA Technologies, Inc. VT6315 Series Firewire Controller
>> -       Physical Slot: 1
>> -       Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
>> -       Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
>> -       Latency: 0, Cache Line Size: 64 bytes
>> -       Interrupt: pin A routed to IRQ 19
>> -       Region 0: Memory at f6c00000 (64-bit, non-prefetchable) [size=2K]
>> -       Region 2: I/O ports at c000 [size=256]
>> -       Capabilities: [50] Power Management version 3
>> -               Flags: PMEClk- DSI- D1- D2+ AuxCurrent=0mA PME(D0-,D1-,D2+,D3hot+,D3cold+)
>> -               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>> -       Capabilities: [80] MSI: Enable- Count=1/1 Maskable+ 64bit+
>> -               Address: 0000000000000000  Data: 0000
>> -               Masking: 00000000  Pending: 00000000
>> -       Capabilities: [98] Express (v1) Endpoint, MSI 00
>> -               DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
>> -                       ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
>> -               DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
>> -                       RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
>> -                       MaxPayload 128 bytes, MaxReadReq 512 bytes
>> -               DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr+ TransPend-
>> -               LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <1us, L1 <64us
>> -                       ClockPM+ Surprise- LLActRep- BwNot-
>> -               LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
>> -                       ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
>> -               LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
>> -       Capabilities: [100 v1] Advanced Error Reporting
>> -               UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
>> -               UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
>> -               UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
>> -               CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
>> -               CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
>> -               AERCap: First Error Pointer: 14, GenCap+ CGenEn- ChkCap+ ChkEn-
>> -       Capabilities: [130 v1] Device Serial Number 00-11-06-ff-ff-00-00-03
>> -       Kernel driver in use: firewire_ohci
>> -00: 06 11 03 34 07 00 10 00 01 10 00 0c 10 00 00 00
>> -10: 04 00 c0 f6 00 00 00 00 01 c0 00 00 00 00 00 00
>> -20: 00 00 00 00 00 00 00 00 00 00 00 00 06 11 03 34
>> -30: 00 00 00 00 50 00 00 00 00 00 00 00 0a 01 00 00
>> -40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> -50: 01 80 03 e4 00 00 00 00 00 00 00 00 00 00 00 00
>> -60: 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00
>> -70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> -80: 05 98 80 01 00 00 00 00 00 00 00 00 00 00 00 00
>> -90: 00 00 00 00 00 00 00 00 10 00 01 00 00 80 90 05
>> -a0: 00 20 19 00 11 4c 07 00 00 01 11 00 00 00 00 00
>> -b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> -c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> -d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> -e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> -f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

> 
> When I cold-boot the laptop with an empty express card slot and let acpiphp do the
> hotplug work, I get same lspci values with one difference. The PME# values are flipping
> in opposite direction (ASPM L1 Enabled -> ASPM L0s L1 Enabled on pure hotplug whereas
> on the subsequent hotplugs on a cold-booted laptop with a card inserted the changes were
> ASPM Disabled -> ASPM L0s L1 Enabled [the original email in this thread]):
> 
> Below is the pure acpiphp hotplug behavior for reference with 'pcie_aspm=off' and 'nousb'
> for which the PME# game does NOT happen:


>> Finally, the PME# game again:
>> --- lspci_loop.23:46:44 2013-03-11 23:46:44.000000000 +0100
>> +++ lspci_loop.23:46:45 2013-03-11 23:46:45.000000000 +0100
>> @@ -410,7 +410,7 @@
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>> -               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>> +               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>>  00: 86 80 18 1c 07 00 10 00 b5 00 04 06 10 00 81 00
>>  10: 00 00 00 00 00 00 00 00 00 0b 0c 00 f0 00 00 20
>> @@ -422,7 +422,7 @@
>>  70: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
>> -a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
>> +a0: 01 00 02 c8 00 00 00 00 00 00 00 00 00 00 00 00
>>  b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  d0: 00 00 00 01 02 0b 00 00 00 80 11 81 00 00 00 00
>> --- lspci_loop.23:46:45 2013-03-11 23:46:45.000000000 +0100
>> +++ lspci_loop.23:46:46 2013-03-11 23:46:46.000000000 +0100
>> @@ -410,7 +410,7 @@
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>> -               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>> +               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>>  00: 86 80 18 1c 07 00 10 00 b5 00 04 06 10 00 81 00
>>  10: 00 00 00 00 00 00 00 00 00 0b 0c 00 f0 00 00 20
>> @@ -422,7 +422,7 @@
>>  70: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
>> -a0: 01 00 02 c8 00 00 00 00 00 00 00 00 00 00 00 00
>> +a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
>>  b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  d0: 00 00 00 01 02 0b 00 00 00 80 11 81 00 00 00 00
> 
> The above do not happen on a system cold-booted with an empty express card slot.
> 
>>
>>
>>
>> Further details can be found by comparing these two directories:
>>
>> Firewire_coldplug_disabled_Media_card_reader/
>> Firewire_coldplug_disabled_Media_card_reader_nousb/
>>
>> Fetch them from http://195.113.57.32/~mmokrejs/tmp/3.7.10_acpiphp_pcie_aspm_off_full.tar.bz2
>> (1.2MB but covers in additional sub-directories also other cards tested)
> 
> The purely acpiphp hotplug data are in Firewire_hotplug_disabled_Media_card_reader_nousb/
> subdirectory. Diffing dmesg under Firewire_coldplug_disabled_Media_card_reader_nousb/
> and under Firewire_hotplug_disabled_Media_card_reader_nousb/ is left as an exercise for the
> reader willing to resolve the 
> 
> - ASPM L1 Enabled -> ASPM L0s L1 Enabled
> + ASPM Disabled -> ASPM L0s L1 Enabled
> 
> underlying issue.

OK, here we go (lines starting with minus are those when card was inserted during cold bootup):

Patch

--- /tmp/dmesg_Firewire_coldplug_disabled_Media_card_reader_nousb.txt   2013-03-12 11:46:16.000000000 +0100
+++ /tmp/dmesg_Firewire_hotplug_disabled_Media_card_reader_nousb.txt    2013-03-12 14:13:55.000000000 +0100
@@ -369,12 +369,6 @@ 
 pci_bus 0000:0b: bus scan returning with max=0b
 pci 0000:00:1c.7: scanning [bus 11-16] behind bridge, pass 0
 pci_bus 0000:11: scanning bus
-pci 0000:11:00.0: [1106:3403] type 00 class 0x0c0010
-pci 0000:11:00.0: reg 10: [mem 0xf6c00000-0xf6c007ff 64bit]
-pci 0000:11:00.0: reg 18: [io  0xc000-0xc0ff]
-pci 0000:11:00.0: supports D2
-pci 0000:11:00.0: PME# supported from D2 D3hot D3cold
-pci 0000:11:00.0: PME# disabled
 pci_bus 0000:11: fixups for bus
 pci 0000:00:1c.7: PCI bridge to [bus 11-16]
 pci 0000:00:1c.7:   bridge window [io  0xc000-0xdfff]
@@ -436,8 +430,6 @@ 
 pci 0000:09:00.0: BAR 0: reserving [mem 0xf7e00000-0xf7e01fff flags 0x140204] (d=0, p=0)
 pci 0000:0b:00.0: BAR 0: reserving [mem 0xf7d00000-0xf7d0ffff flags 0x140204] (d=0, p=0)
 pci 0000:0b:00.0: BAR 2: reserving [mem 0xf7d10000-0xf7d11fff flags 0x140204] (d=0, p=0)
-pci 0000:11:00.0: BAR 0: reserving [mem 0xf6c00000-0xf6c007ff flags 0x140204] (d=0, p=0)
-pci 0000:11:00.0: BAR 2: reserving [io  0xc000-0xc0ff flags 0x40101] (d=0, p=0)
 e820: reserve RAM buffer [mem 0x0009d400-0x0009ffff]
 e820: reserve RAM buffer [mem 0xda4e5000-0xdbffffff]
 e820: reserve RAM buffer [mem 0xda793000-0xdbffffff]
@@ -819,17 +811,14 @@ 
 VFS: Mounted root (ext3 filesystem) readonly on device 8:5.
 devtmpfs: mounted
 Freeing unused kernel memory: 688k freed
-systemd-udevd[1887]: starting version 197
-firewire_ohci 0000:11:00.0: calling quirk_via_vlink+0x0/0xa5
-firewire_ohci 0000:11:00.0: added OHCI v1.10 device as card 0, 4 IR + 8 IT contexts, quirks 0x11
+systemd-udevd[1885]: starting version 197
 Intel(R) Wireless WiFi driver for Linux, in-tree:d
 Copyright(c) 2003-2012 Intel Corporation
 iwlwifi 0000:09:00.0: pci_resource_len = 0x00002000
-iwlwifi 0000:09:00.0: pci_resource_base = ffffc90006aa8000
+iwlwifi 0000:09:00.0: pci_resource_base = ffffc90006adc000
 iwlwifi 0000:09:00.0: HW Revision ID = 0x34
 iwlwifi 0000:09:00.0: irq 43 for MSI/MSI-X
 iwlwifi 0000:09:00.0: loaded firmware version 18.168.6.1
-firewire_core 0000:11:00.0: created device fw0: GUID 0011066600000003, S400
 iwldvm: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:d
 iwldvm: Copyright(c) 2003-2012 Intel Corporation
 iwlwifi 0000:09:00.0: CONFIG_IWLWIFI_DEBUG enabled
@@ -848,6 +837,7 @@ 
 [drm] Initialized drm 1.1.0 20060810
 r8169 0000:05:00.0: PME# enabled
 pcieport 0000:00:1c.0: PME# enabled
+pcieport 0000:00:1c.7: PME# enabled
 r8169 0000:05:00.0 eth0: rtl_phyar_cond == 1 (loop: 20, delay: 25).
 r8169 0000:05:00.0 eth0: rtl_phyar_cond == 1 (loop: 20, delay: 25).
 r8169 0000:05:00.0 eth0: rtl_phyar_cond == 1 (loop: 20, delay: 25).
@@ -865,7 +855,7 @@ 
 Console: switching to colour frame buffer device 170x48
 fb0: inteldrmfb frame buffer device
 drm: registered panic notifier
-acpi device:34: registered as cooling_device2
+acpi device:33: registered as cooling_device2
 ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
 input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input12
 [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
@@ -880,652 +870,18 @@ 
 microcode: CPU1 updated to revision 0x28, date = 2012-04-24
 perf_event_intel: PEBS enabled due to microcode update
 r8169 0000:05:00.0 eth0: link down
-r8169 0000:05:00.0: PME# enabled
-r8169 0000:05:00.0: PME# disabled
-r8169 0000:05:00.0 eth0: link down
 r8169 0000:05:00.0 eth0: link up
-pcieport 0000:00:1c.4: PME# enabled
-pcieport 0000:00:1c.4: PME# disabled
-pcieport 0000:00:1c.4: PME# enabled
-pcieport 0000:00:1c.4: PME# disabled
-pcieport 0000:00:1c.4: PME# enabled
-pcieport 0000:00:1c.4: PME# disabled
[cut]


Do not know why 00:1c.7 is involved here, but here it is recorded when cold-booted without the Firewire
card in the express card slot:

# less Firewire_hotplug_disabled_Media_card_reader_nousb/lspci_vvvxxx.txt
[cut]
00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b5) (prog-if 00 [Normal decode])
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Bus: primary=00, secondary=11, subordinate=16, sec-latency=0
        I/O behind bridge: 0000c000-0000dfff
        Memory behind bridge: f6c00000-f7cfffff
        Prefetchable memory behind bridge: 00000000f0000000-00000000f10fffff
        Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
        BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
                PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
        Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
                DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
                        ExtTag- RBE+ FLReset-
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
                        RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
                        MaxPayload 128 bytes, MaxReadReq 128 bytes
                DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
                LnkCap: Port #8, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <1us, L1 <16us
                        ClockPM- Surprise- LLActRep+ BwNot-
                LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk-
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s, Width x0, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
                SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+
                        Slot #7, PowerLimit 10.000W; Interlock- NoCompl+
                SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
                        Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
                SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
                        Changed: MRL- PresDet- LinkState-
                RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
                RootCap: CRSVisible-
                RootSta: PME ReqID 0000, PMEStatus- PMEPending-
                DevCap2: Completion Timeout: Range BC, TimeoutDis+, LTR-, OBFF Not Supported ARIFwd-
                DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled ARIFwd-
                LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
                         Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
                         Compliance De-emphasis: -6dB
                LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1-
                         EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
        Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
                Address: 00000000  Data: 0000
        Capabilities: [90] Subsystem: Dell Device 04b3
        Capabilities: [a0] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
        Kernel driver in use: pcieport
00: 86 80 1e 1c 07 00 10 00 b5 00 04 06 10 00 81 00
10: 00 00 00 00 00 00 00 00 00 11 16 00 c0 d0 00 00
20: c0 f6 c0 f7 01 f0 01 f1 00 00 00 00 00 00 00 00
30: 00 00 00 00 40 00 00 00 00 00 00 00 0a 04 10 00
40: 10 80 42 01 00 80 00 00 00 00 10 00 12 4c 12 08
50: 02 00 01 10 60 b2 3c 00 00 00 00 00 00 00 00 00
60: 00 00 00 00 16 00 00 00 00 00 00 00 00 00 00 00
70: 01 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
80: 05 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90: 0d a0 00 00 28 10 b3 04 00 00 00 00 00 00 00 00
a0: 01 00 02 c8 03 01 00 00 00 00 00 00 00 00 00 00
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 01 02 0b 00 00 02 80 11 c1 00 00 00 00
e0: 00 03 00 00 00 00 00 00 01 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 00 00 87 0f 05 08 00 00 00 00

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