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75b19b790b
linux/arch/x86/pci
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Bertram Felgenhauer 75b19b790b pci, x86: add workaround for bug in ASUS A7V600 BIOS (rev 1005) 
This BIOS claims the VIA 8237 south bridge to be compatible with VIA 586,
which it is not.

Without this patch, I get the following warning while booting,
among others,

| PCI: Using IRQ router VIA [1106/3227] at 0000:00:11.0
| ------------[ cut here ]------------
| WARNING: at arch/x86/pci/irq.c:265 pirq_via586_get+0x4a/0x60()
| Modules linked in:
| Pid: 1, comm: swapper Not tainted 2.6.26-rc4-00015-g1ec7d99 #1
|  [<c0119fd4>] warn_on_slowpath+0x54/0x70
|  [<c02246e0>] ? vt_console_print+0x210/0x2b0
|  [<c02244d0>] ? vt_console_print+0x0/0x2b0
|  [<c011a413>] ? __call_console_drivers+0x43/0x60
|  [<c011a482>] ? _call_console_drivers+0x52/0x80
|  [<c011aa89>] ? release_console_sem+0x1c9/0x200
|  [<c0291d21>] ? raw_pci_read+0x41/0x70
|  [<c0291e8f>] ? pci_read+0x2f/0x40
|  [<c029151a>] pirq_via586_get+0x4a/0x60
|  [<c02914d0>] ? pirq_via586_get+0x0/0x60
|  [<c029178d>] pcibios_lookup_irq+0x15d/0x430
|  [<c03b895a>] pcibios_irq_init+0x17a/0x3e0
|  [<c03a66f0>] ? kernel_init+0x0/0x250
|  [<c03a6763>] kernel_init+0x73/0x250
|  [<c03b87e0>] ? pcibios_irq_init+0x0/0x3e0
|  [<c0114d00>] ? schedule_tail+0x10/0x40
|  [<c0102dee>] ? ret_from_fork+0x6/0x1c
|  [<c03a66f0>] ? kernel_init+0x0/0x250
|  [<c03a66f0>] ? kernel_init+0x0/0x250
|  [<c010324b>] kernel_thread_helper+0x7/0x1c
|  =======================
| ---[ end trace 4eaa2a86a8e2da22 ]---

and IRQ trouble later,

| irq 10: nobody cared (try booting with the "irqpoll" option)

Now that's an VIA 8237 chip, so pirq_via586_get shouldn't be called
at all; adding this workaround to via_router_probe() fixes the
problem for me.

Amazingly I have a 2.6.23.8 kernel that somehow works fine ... I'll
never understand why.

Signed-off-by: Bertram Felgenhauer <int-e@gmx.de>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-02 11:29:10 +02:00
..
acpi.c x86/pci: add pci=skip_isa_align command lines. 2008-05-05 09:22:08 -07:00
common.c PCI: Correct last two HP entries in the bfsort whitelist 2008-05-22 18:16:24 +02:00
direct.c x86 pci: remove checking type for mmconfig probe 2008-04-26 23:41:04 +02:00
early.c i386: move pci 2007-10-11 11:16:36 +02:00
fixup.c x86/pci: remove flag in pci_cfg_space_size_ext 2008-04-29 15:34:05 -07:00
i386.c x86/PCI: X86_PAT & mprotect 2008-05-13 09:51:54 -07:00
init.c x86 PCI: call dmi_check_pciprobe() 2008-05-05 09:24:00 -07:00
irq.c pci, x86: add workaround for bug in ASUS A7V600 BIOS (rev 1005) 2008-06-02 11:29:10 +02:00
k8-bus_64.c x86: remove spew print out about bus to node mapping 2008-05-10 19:31:45 +02:00
legacy.c x86: get mp_bus_to_node early 2008-04-26 23:41:04 +02:00
Makefile x86_64: move pci 2007-10-11 11:17:12 +02:00
Makefile_32 x86: undo visws/numaq build changes 2008-05-04 20:04:45 +02:00
Makefile_64 x86: multi pci root bus with different io resource range, on 64-bit 2008-04-26 23:41:04 +02:00
mmconfig_32.c x86: clear pci_mmcfg_virt when mmcfg get rejected 2008-04-26 23:41:03 +02:00
mmconfig_64.c x86: clear pci_mmcfg_virt when mmcfg get rejected 2008-04-26 23:41:03 +02:00
mmconfig-shared.c x86: add pci=check_enable_amd_mmconf and dmi check 2008-04-26 23:41:04 +02:00
mp_bus_to_node.c x86: get mp_bus_to_node early 2008-04-26 23:41:04 +02:00
numa.c x86: remove mpc_oem_bus_info() 2008-04-17 17:41:08 +02:00
olpc.c x86: olpc: add One Laptop Per Child architecture support 2008-04-29 08:06:07 -07:00
pcbios.c PCI: remove initial bios sort of PCI devices on x86 2008-04-20 21:46:58 -07:00
pci.h x86 PCI: call dmi_check_pciprobe() 2008-05-05 09:24:00 -07:00
visws.c Change pci_raw_ops to pci_raw_read/write 2008-02-10 12:52:46 -08:00