LIBATA - "irq 11: nobody cared" on sil 3112a

Hello,
Im trying to run libata driver on my Asus A7N8X-deluxe (latest bios 1008) with Sil 3112a controller, but i'm permanently getting "irq 11: nobody cared.....disabling irq11" error. After this error computer hangs totally. I found some info about enabling "Enhanced mode" and "Sata only" options in bios, but they are not avalible in my motherboard. I've managed to chatch some, hopefully, useful info through netconsole. My kernel config and lspci output are also there. This log was made with ACPI compiled in, but there was exactly same problem when ACPI was not compiled in.

http://www.gutko.neostrada.pl/nobody_cared.txt
Maciej Gornicki
ps. these 2 errors with "eth0: BUG!" appeared when I enabled netconsole.

irq 11: nobody cared!

[<c01080ca>] __report_bad_irq+0x2a/0x90
[<c01081bc>] note_interrupt+0x6c/0xa0
[<c0108491>] do_IRQ+0x121/0x130
[<c0106674>] common_interrupt+0x18/0x20
[<c011e530>] __do_softirq+0x30/0x90
[<c011e5b6>]<4>eth0: BUG! Tx Ring full, refusing to send buffer.
do_softirq+0x26/0x30
[<c010846d>] do_IRQ+0xfd/0x130
[<c0106674>] common_interrupt+0x18/0x20
[<c0103b93>] default_idle+0x23/0x30
[<c0103bfc>] cpu_idle+0x2c/0x40
[<c03827ad>]<4>eth0: BUG! Tx Ring full, refusing to send buffer.
start_kernel+0x17d/0x1c0
[<c03823b0>] unknown_bootoption+0x0/0x160

handlers:
[<c02240f0>] (ata_interrupt+0x0/0x1c0)
Disabling IRQ #11