The event handler should be unregistered when the plugin unloaded
otherwise it'll try to access invalid memory.

Cc: Jiri Olsa <jo...@redhat.com>
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
 tools/lib/traceevent/plugin_mac80211.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/lib/traceevent/plugin_mac80211.c 
b/tools/lib/traceevent/plugin_mac80211.c
index 558a3b91c046..7e15a0f1c2fd 100644
--- a/tools/lib/traceevent/plugin_mac80211.c
+++ b/tools/lib/traceevent/plugin_mac80211.c
@@ -93,3 +93,10 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
                                      drv_bss_info_changed, NULL);
        return 0;
 }
+
+void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
+{
+       pevent_unregister_event_handler(pevent, -1, "mac80211",
+                                       "drv_bss_info_changed",
+                                       drv_bss_info_changed, NULL);
+}
-- 
1.7.11.7

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