Using latest 2.6.37-rc5-git3 kernel, suddenly my machine locked up.
Attached is the output in /var/log/warn directly before that happened.
Created attachment 40102 [details]
Output of /var/log/warn
This seems close to the bug that is fixed by commit 20ed3166c84d145589a89d8cde12aa32cf2d17f4 in wireless-next.
Maybe that patch should be ported to 2.6.37.
Created attachment 40112 [details]
Handled-By : John W. Linville <firstname.lastname@example.org>
Handled-By : Johannes Stezenbach <email@example.com>
Patch : https://bugzilla.kernel.org/attachment.cgi?id=40112
Heinz, did yo utry the patch from comment 3?
Nevermind, I just saw your lkml post...
Fixed by commit 9f33328 mac80211/rt2x00: add ieee80211_tx_status_ni() .