Full dmesg of the faulty run with debugging attached for your reference.
Indeed, as John said this patch made it into mainline and is already
applied to my sources:

chainsaw@amalthea /cvs/linux-2.6 $ patch --dry-run -p1 -i ~/\[PATCH_5_6
\]_cfg80211\:_Fix_regression_with_11d_on_bands.diff 
patching file net/wireless/reg.c
Reversed (or previously applied) patch detected!  Assume -R? [n] ^C

Regards,
Tony V.