[tip:perf/core] tools lib traceevent: Unregister handler when mac80211 plugin is unloaded

[tip-bot for Namhyung Kim]

Commit-ID:  ec7c6debdd446ad2262f236d13964efae90ba0f7
Gitweb:     http://git.kernel.org/tip/ec7c6debdd446ad2262f236d13964efae90ba0f7
Author:     Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Thu, 16 Jan 2014 11:31:14 +0900
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 16 Jan 2014 16:26:25 -0300

tools lib traceevent: Unregister handler when mac80211 plugin is unloaded

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 558a3b9..7e15a0f 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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