Messages in this thread Patch in this message | | | Date | Fri, 30 May 2008 03:20:05 +0200 | From | Bertram Felgenhauer <> | Subject | [PATCH] x86: Add workaround for bug in ASUS A7V600 BIOS (rev 1005) |
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This BIOS claims the VIA 8237 south bridge to be compatible with VIA 586, which it is not.
Signed-off-by: Bertram Felgenhauer <int-e@gmx.de> --- 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.
The patch is against Linus' tree.
Please CC me in replies.
Thanks,
Bertram
arch/x86/pci/irq.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c index 0908fca..ca8df9c 100644 --- a/arch/x86/pci/irq.c +++ b/arch/x86/pci/irq.c @@ -621,6 +621,13 @@ static __init int via_router_probe(struct irq_router *r, */ 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; } } -- 1.5.3
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