Atheros AR9485 kills my wifi router (solved)

Ok, here's the story:
I have a laptop with atheros ar9485. The wired connection works fine, but the moment I connect to my wifi TENDA router, the wireless network dies. And by dies, I mean that it disappears and the router needs to be manually rebooted.
I used another router (OpenWrt), and it doesn't crash. But the connection is very unstable, it drops at random.
I still don't know whether the problem was between the Atheros and the Tenda router (I read somewhere that Atheros has a problem with Netgear routers), but it doesn't matter. Here's how I fixed it.
First, as suggested in the Sabayon Forum (link), I got the outputs from:
uname -a
rfkill list
iwconfig (before the router crash)
iwconfig (after)
dmesg|tail -25

The output from the dmesg looked like this:
[ 5858.487813] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5858.487817] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 5858.487821] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5858.487824] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5859.529403] wlan0: authenticate with c8:3a:35:27:51:58
[ 5859.548446] wlan0: send auth to c8:3a:35:27:51:58 (try 1/3)
[ 5859.550322] wlan0: authenticated
[ 5859.551076] wlan0: associate with c8:3a:35:27:51:58 (try 1/3)
[ 5859.612983] wlan0: RX AssocResp from c8:3a:35:27:51:58 (capab=0x11 status=0 aid=1)
[ 5859.613012] wlan0: associated
[ 5859.613079] cfg80211: Calling CRDA for country: CN
[ 5859.614768] ath: regdomain 0x809c updated by CountryIE
[ 5859.614771] ath: EEPROM regdomain: 0x809c
[ 5859.614772] ath: EEPROM indicates we should expect a country code
[ 5859.614773] ath: doing EEPROM country->regdmn map search
[ 5859.614774] ath: country maps to regdmn code: 0x52
[ 5859.614775] ath: Country alpha2 being used: CN
[ 5859.614776] ath: Regpair used: 0x52
[ 5859.614790] cfg80211: Regulatory domain changed to country: CN
[ 5859.614791] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 5859.614793] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[ 5859.614794] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (N/A, 3000 mBm)
[ 5859.614796] cfg80211:   (57240000 KHz - 59400000 KHz @ 2160000 KHz), (N/A, 2800 mBm)
[ 5859.614797] cfg80211:   (59400000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 4400 mBm)
[ 5859.614798] cfg80211:   (63720000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 2800 mBm)

So after some digging, I discovered that there seems to be a problem with CRDA and the network adapter identification. You can see more on the story here and here. There you can find also some recommended solutions, but what I did is the following:

sudo equo install crda (if you don't have it)
sudo nano /etc/default/crda

and added this line: 

REGDOMAIN=BG 

And that was it. I got this solution from this site. It turned out it worked. Now, the connection is stable and the router - alive. 

I lost half a day on this, but now I feel quite happier. And I have wireless :) 

Enjoy!