From: Naftali Goldstein naftali.goldstein@intel.com
[ Upstream commit f8891461a277ec0afc493fd30cd975a38048a038 ]
It is not a good idea to try to perform any work (e.g. send an auth frame) during reconfigure flow.
Prevent this from happening, and at the end of the reconfigure flow requeue all the works.
Signed-off-by: Naftali Goldstein naftali.goldstein@intel.com Signed-off-by: Luca Coelho luciano.coelho@intel.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/ieee80211_i.h | 7 +++++++ net/mac80211/util.c | 4 ++++ 2 files changed, 11 insertions(+)
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 6ea64cadad00..ae9cce2d41da 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1998,6 +1998,13 @@ void __ieee80211_flush_queues(struct ieee80211_local *local,
static inline bool ieee80211_can_run_worker(struct ieee80211_local *local) { + /* + * It's unsafe to try to do any work during reconfigure flow. + * When the flow ends the work will be requeued. + */ + if (local->in_reconfig) + return false; + /* * If quiescing is set, we are racing with __ieee80211_suspend. * __ieee80211_suspend flushes the workers after setting quiescing, diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 3deaa01ebee4..f60e033f68c9 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -2224,6 +2224,10 @@ int ieee80211_reconfig(struct ieee80211_local *local) mutex_lock(&local->mtx); ieee80211_start_next_roc(local); mutex_unlock(&local->mtx); + + /* Requeue all works */ + list_for_each_entry(sdata, &local->interfaces, list) + ieee80211_queue_work(&local->hw, &sdata->work); }
ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,