[PATCH 08/19] tools lib traceevent: Unregister handler when mac80211 plugin is unloaded

From: Arnaldo Carvalho de Melo
Date: Fri Jan 17 2014 - 10:02:58 EST

From: Namhyung Kim <namhyung@xxxxxxxxxx>

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

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Reviewed-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung.kim@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1389839478-5887-9-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
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);

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