[ath9k-devel] Kernel panic + HT question

[Kostas Nakos <knakos@inaccessnetworks.com>]

Hello list,

I have a pair of ath9k wireless adapters. One of them is on a 
powerpc-based board, with compat-wireless cross compiled, acting as an 
AP with hostapd; the other one is on a x86 pc using a mini-pci to pci 
card, also running compat-wireless. Both cards are identical, as ath9k 
reports the following info:

phy0: Atheros AR9160 MAC/BB Rev:1 AR5133 RF Rev:b0:

The host and the station run the 2.6.28 kernel. The host (powerpc) has 
compat-wireless-20090205 while the client (pc) has compat-wireless-20090211.

The client connects and works OK when the AP is set to use channel 9 and 
  ieee80211n=1 in hostapd. When we additionally supply ht_capab=[HT40-] 
to hostapd, the client crashes with a kernel panic. Please find 
attached: messages.txt which contains the panic message of such a crash 
from /var/log/messages, and ath9kcrash.txt which contains the first few 
functions as reported in such a crash in the console of the pc and 
written down by hand by me.

If it is any help, searching around, as this issue has been around for 
at least a month in compat-wireless, I stumbled upon a similar bug 
report here:
https://bugzilla.redhat.com/show_bug.cgi?id=472372
which John has marked as a duplicate bug.



As an aside, it'd be nice to know if such a setup can achieve actual 
tx/rx rates that are in the neighborhood of 11n, e.g. greater than g 
speeds, using the setup we have: 2xath9k+hostapd+wpa_supplicant. I may 
be jumping the gun here, but we've been trying to test for this the last 
month and the crashes deter us.

Best Regards,
Kostas
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