Add a ieee80211_waitfor_parent() function that will wait for all deferred

parent interface tasks to complete. This had been added to the ioctl path but
it is also need elsewhere like detach so its safe to teardown.

Reported by:	Hans Petter Selasky
Submitted by:	sam

1 files changed, 15 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_proto.c b/sys/net80211/ieee80211_proto.c
index 31b68fd..b31d3af 100644
--- a/sys/net80211/ieee80211_proto.c
+++ b/sys/net80211/ieee80211_proto.c
@@ -1072,6 +1072,17 @@ parent_updown(void *arg, int npending)
 }
 
 /*
+ * Block until the parent is in a known state.  This is
+ * used after any operations that dispatch a task (e.g.
+ * to auto-configure the parent device up/down).
+ */
+void
+ieee80211_waitfor_parent(struct ieee80211com *ic)
+{
+	taskqueue_drain(taskqueue_thread, &ic->ic_parent_task);
+}
+
+/*
  * Start a vap running.  If this is the first vap to be
  * set running on the underlying device then we
  * automatically bring the device up.
@@ -1258,6 +1269,8 @@ ieee80211_stop_all(struct ieee80211com *ic)
 			ieee80211_stop_locked(vap);
 	}
 	IEEE80211_UNLOCK(ic);
+
+	ieee80211_waitfor_parent(ic);
 }
 
 /*
@@ -1278,6 +1291,8 @@ ieee80211_suspend_all(struct ieee80211com *ic)
 		}
 	}
 	IEEE80211_UNLOCK(ic);
+
+	ieee80211_waitfor_parent(ic);
 }
 
 /*