diff options
Diffstat (limited to 'net/mac80211/ieee80211_i.h')
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 6e1b184183fb..bdb3e3bc7503 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1886,6 +1886,36 @@ void __ieee80211_flush_queues(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, unsigned int queues, bool drop); +static inline bool ieee80211_can_run_worker(struct ieee80211_local *local) +{ + /* + * If quiescing is set, we are racing with __ieee80211_suspend. + * __ieee80211_suspend flushes the workers after setting quiescing, + * and we check quiescing / suspended before enqueing new workers. + * We should abort the worker to avoid the races below. + */ + if (local->quiescing) + return false; + + /* + * We might already be suspended if the following scenario occurs: + * __ieee80211_suspend Control path + * + * if (local->quiescing) + * return; + * local->quiescing = true; + * flush_workqueue(); + * queue_work(...); + * local->suspended = true; + * local->quiescing = false; + * worker starts running... + */ + if (local->suspended) + return false; + + return true; +} + void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, u16 transaction, u16 auth_alg, u16 status, const u8 *extra, size_t extra_len, const u8 *bssid, |