Lock enabling onboard lan (Attansic L1 GbE) on 7.1-PRERELEASE

[Barbara]

Hello,
one of my motherboards has an onboard Attansic network interface, I 
think an AR8121.

# pciconf -lcv
none0 at pci0:4:0:0:       class=0x020000 
card=0x82261043 chip=0x10481969 rev=0xb0 hdr=0x00
    vendor     = 'Attansic 
(Now owned by Atheros)'
    device     = 'L1 Gigabit Ethernet 10/100/1000Base-T 
Ethernet Controller'
    class      = network
    subclass   = ethernet
    cap 
01[40] = powerspec 2  supports D0 D3  current D0
    cap 05[48] = MSI supports 
1 message, 64 bit
    cap 10[58] = PCI-Express 1 endpoint
    cap 03[6c] = VPD


Today I decided to give it a try.
But if I try loading the if_age module, the 
system prints the following lines and then it freezes.

age0: <Attansic 
Technology Corp, L1 Gigabit Ethernet> mem 0xfbdc0000-0xfbdfffff irq 36 at 
device 0.0 on pci4
age0: PCI device revision : 0x00b0
age0: Chip id/revision : 
0x9006
age0: 1280 Tx FIFO, 2364 Rx FIFO
age0: MSIX count : 0
age0: MSI count : 
1
age0: Using 1 MSI messages.
age0: Read request size : 512 bytes.
age0: TLP 
payload size : 128 bytes.