K 10
svn:author
V 6
adrian
K 8
svn:date
V 27
2011-08-15T13:25:55.756931Z
K 7
svn:log
V 598
Fix some of the locking to correctly protect things.

Specifically, ath_tx_tid_unsched() wasn't correctly locking things,
so there was a race condition between the upper half that were
unscheduling things (eg a node flush) and the lower half (tx sched
and completion task.) Fixing it required re-doing some of the
locking.

This seems to now cope with TX failures -> BAR -> BAR failure ->
DELBA. Normal TX then continues fine. Before, the code would
get wedged whilst doing packet TX whilst doing BAR re-transmission,
and things would stop progressing until a scan or some other flush
would occur.

END