Attached dmesg. config.gz. here's the OOPS part.

ata_piix 0000:00:1f.2: version 2.10
ata_piix 0000:00:1f.2: MAP [ P0 P2 P1 P3 ]
ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 19
ata: 0x1F0 IDE port busy
ata: conflict with ide0
BUG: at drivers/pci/pci.c:846 pcim_pin_device()
  [<c023838c>] pcim_pin_device+0x4c/0x60
  [<c0371af6>] ata_pci_init_one+0x2d6/0x380
  [<c023b968>] pci_get_device+0x18/0x20
  [<c0378651>] piix_check_450nx_errata+0x31/0x110
  [<c0238b90>] pci_intx+0x20/0x90
  [<c0378a97>] piix_init_one+0x117/0x200
  [<c023afca>] pci_call_probe+0xa/0x10
  [<c023b01e>] __pci_device_probe+0x4e/0x60
  [<c023b056>] pci_device_probe+0x26/0x60
  [<c0295a94>] really_probe+0xb4/0x170
  [<c023afa8>] pci_match_device+0xa8/0xc0
  [<c0295c28>] driver_probe_device+0xc8/0xd0
  [<c0465521>] klist_next+0x61/0xc0
  [<c0295d30>] __driver_attach+0x80/0x90
  [<c0294d0a>] bus_for_each_dev+0x3a/0x60
  [<c0295d56>] driver_attach+0x16/0x20
  [<c0295cb0>] __driver_attach+0x0/0x90
  [<c029532f>] bus_add_driver+0x5f/0x110
  [<c023b3d2>] __pci_register_driver+0x82/0xc0
  [<c05c0b91>] piix_init+0x11/0x20
  [<c059ab11>] do_initcalls+0x41/0x130
  [<c0158acc>] register_irq_proc+0x9c/0xc0
  [<c01b4462>] proc_mkdir_mode+0x42/0x60
  [<c059ac30>] init+0x0/0xa0
  [<c059ac7c>] init+0x4c/0xa0
  [<c0104e7f>] kernel_thread_helper+0x7/0x18
  =======================
ata: 0x170 IDE port busy
ata: conflict with ide1
ata_piix: probe of 0000:00:1f.2 failed with error -16
ata_piix 0000:00:1f.5: MAP [ P0 P2 P1 P3 ]
ACPI: PCI Interrupt 0000:00:1f.5[B] -> GSI 19 (level, low) -> IRQ 19
PCI: Setting latency timer of device 0000:00:1f.5 to 64
ata1: SATA max UDMA/133 cmd 0x0001d000 ctl 0x0001cc02 bmdma 0x0001c480 irq 19
ata2: SATA max UDMA/133 cmd 0x0001c880 ctl 0x0001c802 bmdma 0x0001c488 irq 19
scsi2 : ata_piix
ATA: abnormal status 0x7F on port 0x0001d007
scsi3 : ata_piix
ATA: abnormal status 0x7F on port 0x0001c887


Cheers,

Auke