ACPI PCI bus mismatch ?

Hi all

I was debugging ACPI in my laptop and was comparing 2.4.18 against latest 2.4.19pre4-ac1+acpi, when I found this:

There's a method in my DSTD that looks like this:

       Method (_L08, 0, Serialized)
       {
           Store (\_SB.PCI0.PCIB.BRGB, Local0)
           ShiftLeft (Local0, 0x18, Local0)
           Or (Local0, 0x0020B10B, Local0)
           Store (0xAF, \_SB.MEM.IEDI)

.
.
.

When it runs on 2.4.18, I can see it working almost properly. I debugged exregion and this was the result, with my comments:

Feb  5 16:18:09 supernova kernel: exregion-0353 [25] Ex_pci_config_space_ha: Pci_config 0 (8) Seg(0000) Bus(0000) Dev(001e) Func(0000) Reg(0019)
   This one is reading \_SB.PCI0.PCIB.BRGB,  device 0x1e @ bus #0, 

which according to lspci, is my PCI bridge (which is correct):

00:1e.0 PCI bridge: Intel Corp. 82820 820 (Camino 2) Chipset PCI
(-M) (rev 42)

But, when I boot 2.4.20pre4-ac1+acpi, the handler instead of using Bus #0, uses Bus #2:

Feb  5 16:25:28 supernova kernel: exregion-0352 [25] ex_pci_config_space_ha: pci_config 0 (8) Seg(0000) Bus(0002) Dev(001e) Func(0000) Reg(0019)

.... and always reads 0xFF.

lspci with 2.4.20pre4-ac1+acpi is:

alvieboy@supernova:~$ uname -a
Linux supernova 2.4.21-pre4-ac1 #2 SMP Ter Fev 4 12:18:03 WET 2003 i686 unknown unknown GNU/Linux
alvieboy@supernova:~$ lspci
00:00.0 Host bridge: Intel Corp. 82845 845 (Brookdale) Chipset Host Bridge (rev 05)
00:01.0 PCI bridge: Intel Corp. 82845 845 (Brookdale) Chipset AGP Bridge (rev 05)
00:1d.0 USB Controller: Intel Corp.: Unknown device 2482 (rev 02)
00:1d.1 USB Controller: Intel Corp.: Unknown device 2484 (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82820 820 (Camino 2) Chipset PCI (-M) (rev 42)
00:1f.0 ISA bridge: Intel Corp.: Unknown device 248c (rev 02)
00:1f.1 IDE interface: Intel Corp.: Unknown device 248a (rev 02)
00:1f.5 Multimedia audio controller: Intel Corp. AC'97 Audio Controller (rev 02)
00:1f.6 Modem: Intel Corp.: Unknown device 2486 (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation: Unknown device 0175 (rev a3)
02:08.0 Ethernet controller: Intel Corp. 82801CAM (ICH3) Chipset Ethernet Controller (rev 42)
02:0b.0 CardBus bridge: Toshiba America Info Systems ToPIC95 PCI to Cardbus Bridge with ZV Support (rev 32)
02:0b.1 CardBus bridge: Toshiba America Info Systems ToPIC95 PCI to Cardbus Bridge with ZV Support (rev 32)

Anyone sees which might me causing this ?

TYA

Álvaro Lopes ---------------------
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OK, I tracked the problem down to acpi_os_derive_pci_id(). If I remove the call to acpi_os_derive_pci_id() in acpi_ev_pci_config_region_setup() it works fine.

Will do some tests on 2.5.x now and let you know.

Álvaro Lopes ---------------------
A .sig is just a .sig




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This SF.NET email is sponsored by:
SourceForge Enterprise Edition + IBM + LinuxWorld =Something 2 See!
http://www.vasoftware.com