Freebsd 8.0 ath, Soekris 4511, tinybsd, IRQ storm.

Hi guys.

I'm working with FreeBSD 8.0 current using tinybsd to make a image for  
my Soekris 4511 box.

The build image is ok and the system boot up perfect, It detect all  
the network cards includin the ath0 that is a 400 mw NMP-8602 PLUS.

In the moment that I do :

ifconfig wlan create wlandev ath0
ifconfig wlan up

I'm reciving this :

interrupt storm detected on "irq11:"; throttling interrupt source

and is only when I take up the wlan0 interface, if I don't do anything  
with the ath0 card, the system works perfect.

I search in the net for an info and I found a lot of information about  
how to build FreeBSD in Soekris boxes, kernel conf files, etc, but  
nothing about this caind of problem in version 8.0.

My vmstat -i is :

tinybsd# vmstat -i
interrupt                          total       rate
irq0: clk                         170695        490
irq4: sio0                          1993          5
irq8: rtc                          43697        125
irq9: sis1                           392          1
irq11: ath0                        32626         93
irq14: ata0                        16261         46
Total                             265664        763

my pciconf -lv is :

tinybsd# pciconf -lv
hostb0_at_pci0:0:0:0:      class=0x060000 card=0x00000000 chip=0x30001022  
rev=0x00 hdr=0x00
    class      = bridge
    subclass   = HOST-PCI
cbb0_at_pci0:0:9:0:        class=0x060700 card=0x00000000 chip=0xac50104c  
rev=0x02 hdr=0x02
    class      = bridge
    subclass   = PCI-CardBus
ath0_at_pci0:0:16:0:       class=0x020000 card=0x2062168c chip=0x001b168c  
rev=0x01 hdr=0x00
    class      = network
    subclass   = ethernet
sis0_at_pci0:0:18:0:       class=0x020000 card=0x0020100b chip=0x0020100b  
rev=0x00 hdr=0x00
    class      = network
    subclass   = ethernet
sis1_at_pci0:0:19:0:       class=0x020000 card=0x0020100b chip=0x0020100b  
rev=0x00 hdr=0x00
    class      = network
    subclass   = ethernet


My dmesg with ath part :

ath0: <Atheros 5212> mem 0xa0010000-0xa001ffff irq 11 at device 16.0  
on pci0
ath0: [ITHREAD]
ath0: WARNING: using obsoleted if_watchdog interface
ath0: mac 10.5 phy 6.1 radio 6.3
sis0: <NatSemi DP8381[56] 10/100BaseTX> port 0xe100-0xe1ff mem  
0xa0020000-0xa0020fff irq 5 at device 18.0 on pci0
sis0: Silicon Revision: DP83816A


I can send more information if is needed.

I already change the wireless card ( I have for of the same) and the  
matherboard, I upgrade the bios of the Soekris board to 1.38.

Any ideas about the irq storm ?

any special configurations ?

Thanks in advance.

Jose Amengual.