http://bugzilla.kernel.org/show_bug.cgi?id=5966

[EMAIL PROTECTED] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED



------- Additional Comments From [EMAIL PROTECTED]  2006-01-27 20:08 -------
sh-3.00# lspci | grep PIIX
00:07.0 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 02)

The datasheet for the PIIX4 says the ISA bridge is function 0
with device id 7110

sh-3.00# lspci -n -s 0:07.0
00:07.0 Class 0680: 8086:7110 (rev 02)
bingo.

The PIRQ routers are at offset 60 in the device config space...
sh-3.00# lspci -xxx -s0:07.0                                                   
                                                                        
00:07.0 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
00: 86 80 10 71 0f 00 80 02 02 00 80 06 00 00 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40: 00 00 00 00 00 00 00 00 00 00 00 00 09 00 27 04
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60: 0b 0b 80 0b 90 00 00 00 00 fe 80 00 00 00 00 00
70: 00 00 00 00 00 00 0c 0c 00 00 00 00 00 00 00 00
80: 00 00 07 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: 17 81 01 10 00 00 00 00 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 00 00 00 2d 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 30 0f 00 00 00 00 00 00

This shows
60: PIRQRCA = 0b = IRQ 11
61: PIRQRCB = 0b = IRQ 11
62: PIRQRCC = 80 = disabled
63: PIRQRCD = 90 = IRQ 9


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