AR5424 diffirent errors before and after recompiling same kernel

[sergey . kish]

Hello

My Acer Aspire One 751 shipped with Atheros AR5424.
It isn't supported, but was found during boot

> ath0 at pci2 dev 0 function 0 "Atheros AR5424" rev 0x01: apic 2 int 17 (irq 4)
> ath0: AR5424 14.2 phy 7.0 rf 0.0, WOR5_ETSIC, address 00:24:2c:6f:ab:c0

It fails to scan network:

        $ ifconfig ath0 scan debug
        ath0: unable to reset hardware: hal status 3

I've found that Luis Henriques was able to use it year ago
http://www.mail-archive.com/tech@openbsd.org/msg01613.html

So I've started from recompiling my kernel.
No changes were applied, clean src.tar.gz and sys.tar.gz
which I get from the same place as distribution CD
ftp://ftp.spline.de/pub/OpenBSD/4.8/ by FTP.

I've used "5.3.4 - Building the kernel" FAQ insturctions
http://openbsd.org/faq/faq5.html

        # cd /usr/src/sys/arch/i386/conf
        # config GENERIC
        # cd ../compile/GENERIC
        # make clean && make depend && make
            [...lots of output...]
        # make install
        # reboot

Now running same command gives me other errors:

        $ ifconfig ath0 scan debug
        ath0: unable to reset hardware; hal status 200
        ath0: unable to reset hardware; hal status 3692322168

Running again gives only second:

        $ ifconfig ath0 scan debug
        ath0: unable to reset hardware; hal status 3692322168

But why? There was no changes except kernel!