mac80211: properly flush delayed scan work on interface removal

[firefly-linux-kernel-4.4.55.git] / net / mac80211 / iface.c

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 3b9e2b7b3f307c5bbf5a8c95e986e04e0c94e933..653f5eb07a27f4432429a8fbbc4b32e7200cf4c3 100644 (file)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -766,10 +766,12 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
        int i, flushed;
        struct ps_data *ps;
        struct cfg80211_chan_def chandef;
+       bool cancel_scan;
 
        clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 
-       if (rcu_access_pointer(local->scan_sdata) == sdata)
+       cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
+       if (cancel_scan)
                ieee80211_scan_cancel(local);
 
        /*
@@ -992,6 +994,9 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 
        ieee80211_recalc_ps(local, -1);
 
+       if (cancel_scan)
+               flush_delayed_work(&local->scan_work);
+
        if (local->open_count == 0) {
                ieee80211_stop_device(local);