The patch titled
x86: add workaround for bug in ASUS A7V600 BIOS (rev 1005)
has been added to the -mm tree. Its filename is
x86-add-workaround-for-bug-in-asus-a7v600-bios-rev-1005.patch
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------------------------------------------------------
Subject: x86: add workaround for bug in ASUS A7V600 BIOS (rev 1005)
From: Bertram Felgenhauer <int-e@xxxxxx>
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@xxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Acked-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/pci/irq.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN arch/x86/pci/irq.c~x86-add-workaround-for-bug-in-asus-a7v600-bios-rev-1005 arch/x86/pci/irq.c
--- a/arch/x86/pci/irq.c~x86-add-workaround-for-bug-in-asus-a7v600-bios-rev-1005
+++ a/arch/x86/pci/irq.c
@@ -646,6 +646,13 @@ static __init int via_router_probe(struc
*/
device = PCI_DEVICE_ID_VIA_8235;
break;
+ case PCI_DEVICE_ID_VIA_8237:
+ /**
+ * Asus a7v600 bios wrongly reports 8237
+ * as 586-compatible
+ */
+ device = PCI_DEVICE_ID_VIA_8237;
+ break;
}
}
_
Patches currently in -mm which might be from int-e@xxxxxx are
x86-add-workaround-for-bug-in-asus-a7v600-bios-rev-1005.patch
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