[PATCH 0/4] Fix CSA locking issues

[Simon Wunderlich <sw@simonwunderlich.de>]

Unfortunately my channel switch announcement patches contained locking issues
which I didn't notice during my test due to bad configuration. Johannes pointed
them out, so here is my attempt to fix them. This series attempts to fix two
issues:

 * There are "suspicious rcu_dereference_protected() usage" problems for
   ieee80211_assign_beacon and ieee80211_ibss_csa_beacon because the respective
   locking was missing
 * There is a circular dependency between the wdev/sdata-lock and the
   csa_finalize worker lock (see description in patch 3).

These patches contain changes for issues in the RFC series pointed out by
Johannes. I've also found another possible leak so I added this to the series.
Patches are based on mac80211-next.

Cheers,
   Simon

Simon Wunderlich (4):
  cfg80211/mac80211: modify beacon using sdata/wdev-lock, not rtnl lock
  cfg80211/mac80211/ath6kl: acquire wdev lock outside ch_switch_notify
  mac80211: don't cancel csa finalize work within stop_ap
  mac80211: don't leak next beacon when csa is aborted

 drivers/net/wireless/ath/ath6kl/cfg80211.c |    2 ++
 include/net/cfg80211.h                     |    3 +-
 net/mac80211/cfg.c                         |   47 +++++++++++++++++++---------
 net/mac80211/ieee80211_i.h                 |    3 ++
 net/mac80211/iface.c                       |    7 ++++-
 net/wireless/nl80211.c                     |   31 ++++++++++++------
 6 files changed, 67 insertions(+), 26 deletions(-)

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1.7.10.4