Messages in this thread Patch in this message | | | Subject | PCI primary peer detection failure with 2.2.3 | Date | Fri, 19 Mar 1999 09:44:40 -0600 | From | James Bottomley <> |
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The motherboard is a quad PPro intel ALDER OEM.
Reversing one of the new hunks of code in pcibios_fixup_peer_bridges() allows the machine to boot again (it panics because the internal SCSI controller is on PCI bus 1 which it doesn't find under vanilla 2.2.3).
This is the Fix: Index: linux/arch/i386/kernel/bios32.c =================================================================== RCS file: /home/jejb/CVSROOT/linux/arch/i386/kernel/bios32.c,v retrieving revision 1.1.1.2 retrieving revision 1.1.1.2.6.1 diff -u -r1.1.1.2 -r1.1.1.2.6.1 --- bios32.c 1999/03/18 18:56:36 1.1.1.2 +++ bios32.c 1999/03/19 00:41:49 1.1.1.2.6.1 @@ -995,7 +995,7 @@ for(i=0; i<256; i += 8) if (!pcibios_read_config_word(n, i, PCI_VENDOR_ID, &l) && l != 0x0000 && l != 0xffff) { -#ifdef CONFIG_PCI_BIOS +#if 0 if (pci_bios_present) { int succ, idx = 0; u8 bios_bus, bios_dfn; However, it does look accidental that the host bridge for primary peer bus 1 was ever detected in the first place. Should the Orion chipset be treated as an exception like the 450NX?
This is the output of lspci -v for the machine (under 2.2.3 with above patch):
00:0b.0 Ethernet controller: Digital Equipment Corporation DECchip 21041 [Tulip Pass 3] (rev 11) Flags: bus master, medium devsel, latency 96, IRQ 16 I/O ports at f880 Memory at feafec00 (32-bit, non-prefetchable)
00:0c.0 Ethernet controller: Digital Equipment Corporation DECchip 21041 [Tulip Pass 3] (rev 11) Flags: bus master, medium devsel, latency 96, IRQ 17 I/O ports at f800 Memory at feafe800 (32-bit, non-prefetchable)
00:0d.0 SCSI storage controller: Adaptec AIC-7874 [AHA-2944] (rev 03) Flags: bus master, medium devsel, latency 96, IRQ 11 I/O ports at fc00 Memory at feaff000 (32-bit, non-prefetchable)
00:0e.0 Non-VGA unclassified device: Intel Corporation 82375EB (rev 15) Flags: bus master, medium devsel, latency 72
00:0f.0 Unknown class [ff00]: Intel Corporation: Unknown device 0008 Flags: fast devsel Memory at fec01000 (32-bit, prefetchable) Memory at fec01000 (32-bit, prefetchable) Memory at fec01000 (32-bit, prefetchable) Memory at fec01000 (32-bit, prefetchable) Memory at fec01000 (32-bit, prefetchable) Memory at fec01000 (32-bit, prefetchable)
00:14.0 RAM memory: Intel Corporation 82450GX [Orion] (rev 05) Flags: fast devsel
00:19.0 Host bridge: Intel Corporation 82450KX [Orion] (rev 06) Flags: bus master, medium devsel, latency 96
00:1a.0 Host bridge: Intel Corporation 82450KX [Orion] (rev 06) Flags: bus master, medium devsel, latency 96
01:0a.0 Ethernet controller: Digital Equipment Corporation DECchip 21041 [Tulip Pass 3] (rev 11) Flags: bus master, medium devsel, latency 96, IRQ 19 I/O ports at ec80 Memory at fe7fec00 (32-bit, non-prefetchable)
01:0b.0 SCSI storage controller: Adaptec AIC-7880U Flags: bus master, medium devsel, latency 96, IRQ 28 I/O ports at e800 Memory at fe7ff000 (32-bit, non-prefetchable)
01:0c.0 SCSI storage controller: Adaptec AIC-7880U Flags: bus master, medium devsel, latency 96, IRQ 5 I/O ports at e400 Memory at fe7fd000 (32-bit, non-prefetchable)
01:0e.0 PCI bridge: Digital Equipment Corporation DECchip 21052 (rev 01) Flags: bus master, medium devsel, latency 96 Bus: primary=01, secondary=02, subordinate=02, sec-latency=0 I/O behind bridge: 0000d000-0000dfff Memory behind bridge: fe000000-fe3fffff Prefetchable memory behind bridge: fde00000-fde00000 02:01.0 SCSI storage controller: Symbios Logic Inc. (formerly NCR) 53c875 (rev 03) Flags: bus master, medium devsel, latency 96, IRQ 22 I/O ports at dc00 Memory at fe3ffc00 (32-bit, non-prefetchable) Memory at fe3fe000 (32-bit, non-prefetchable)
02:02.0 SCSI storage controller: Symbios Logic Inc. (formerly NCR) 53c875 (rev 03) Flags: bus master, medium devsel, latency 96, IRQ 23 I/O ports at d800 Memory at fe3ff800 (32-bit, non-prefetchable) Memory at fe3fd000 (32-bit, non-prefetchable)
02:03.0 SCSI storage controller: Symbios Logic Inc. (formerly NCR) 53c875 (rev 03) Flags: bus master, medium devsel, latency 96, IRQ 21 I/O ports at d400 Memory at fe3ff400 (32-bit, non-prefetchable) Memory at fe3fc000 (32-bit, non-prefetchable)
02:04.0 SCSI storage controller: Symbios Logic Inc. (formerly NCR) 53c875 (rev 03) Flags: bus master, medium devsel, latency 96, IRQ 31 I/O ports at d000 Memory at fe3ff000 (32-bit, non-prefetchable) Memory at fe3fb000 (32-bit, non-prefetchable)
02:08.0 Memory: AT&T GIS (NCR): Unknown device 0009 (rev 02) Flags: slow devsel, IRQ 31 Memory at fe3fac00 (32-bit, non-prefetchable) Memory at fe3c0000 (32-bit, non-prefetchable) Memory at fe200000 (32-bit, non-prefetchable) James Bottomley
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