ipw2100 ch mask for rfmon, system config & ordinals table 2

Hi!

I noticed that in RFMON I cannot set channel  13 (I think also 12 and 14).
The channel apparently seems to be set OK but I cannot RX any beacon (there is 
an AP on 13 here and in managed mode I can see it ). Also if I was on channel 
5 where another AP is TXing and I change to 13, iwconfig shows current 
channel is 13, but the card still passes beacons on ch 5.

This in the current 2.6.17 driver release as well as the one from sf net. And 
I think it was always in this way. Never been different in past.

So I noticed that channels masks are set in ipw2100_system_config, that is not 
called at all when restarting in rfmon. I tryed to add this call without any 
result.

I tryied to change the 3rd parameter of the command by passing 
REG_CHANNEL_MASK without & ibss_mask and it worked the first time I changed 
channel to 13.
Changing back to, say, 5 and again 13 didn't worked.
Quite strange.

So I tryied to implement writing of ordinals table two and overwrite 
IPW_ORD_EEPROM_IBSS_11B_CHANNELS (without calling ipw2100_system_config in 
rfmon). This appear to work fine. I can see beacons on ch13 without 
problems..

I'd like to send a patch (that make sure the channel mask remain unchanged in 
ibss and bss mode), but I'm not really confident about writing ordinals table 
two. The other way I think is sending system_config, or even restarting the 
card each time we set channel, but I have not tryed yet.

Any clue about this??

Thanks
Andrea Merello