Hi,

it seems that PCI quirks are not handled on resume which results
in all kinds of strange effects, like disappeared PCI devices.

Below is a diff between "lspci -vvvxxx" before and after resume
for my SMBus device which only gets enabled by PCI quirk handling.

-0000:00:1f.3 SMBus: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 03)
-       Subsystem: Samsung Electronics Co Ltd: Unknown device c00c
-       Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
-       Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
-       Interrupt: pin B routed to IRQ 0
-       Region 4: I/O ports at 1100 [size=32]
-00: 86 80 c3 24 01 00 80 02 03 00 05 0c 00 00 00 00
-10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-20: 01 11 00 00 00 00 00 00 00 00 00 00 4d 14 0c c0
-30: 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00
-40: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-60: 00 00 00 00 00 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: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-a0: 00 00 00 00 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 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 60 0f 00 00 00 00 00 00
+0000:00:1f.3 Class ffff: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev ff) (prog-if ff)
+       !!! Unknown header type 7f
+00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
+f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

Besides that, a number of drivers do not restore the pci config
space of their associated devices properly on resume from S3.

These drivers (and associated devices) are:
- intel_agp (Host bridge: Intel Corp. 82855PM Processor to I/O Controller)
- ? (PCI bridge: Intel Corp. 82855PM Processor to AGP Controller)
- uhci_hcd (USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller)
- ? (PCI bridge: Intel Corp. 82801 PCI Bridge)
- ? (ISA bridge: Intel Corp. 82801DBM LPC Interface Controller)
- piix_ide (IDE interface: Intel Corp. 82801DBM (ICH4) Ultra ATA Storage Controller)

Diff between "lspci -vvvxxx" before and after resume for all
problematic devices on my machine is attached.

Are there any patches I can try?


Regards,
Carl-Daniel
-- 
http://www.hailfinger.org/