eal: cleanup multiprocess hotplug resources

When rte_eal_cleanup is called, hotplug should unregister the
resources associated with the multi-process server.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

lib/eal/common/hotplug_mp.c

@@ -462,3 +462,8 @@ int eal_mp_dev_hotplug_init(void)
 
 	return 0;
 }
+
+void eal_mp_dev_hotplug_cleanup(void)
+{
+	rte_mp_action_unregister(EAL_DEV_MP_ACTION_REQUEST);
+}

lib/eal/common/hotplug_mp.h

@@ -37,6 +37,12 @@ struct eal_dev_mp_req {
 int
 eal_mp_dev_hotplug_init(void);
 
+/**
+ * Unregister all mp action callbacks for hotplug.
+ */
+void
+eal_mp_dev_hotplug_cleanup(void);
+
 /**
  * This is a synchronous wrapper for secondary process send
  * request to primary process, this is invoked when an attach

lib/eal/linux/eal.c

@@ -1284,6 +1284,7 @@ rte_eal_cleanup(void)
 	rte_mp_channel_cleanup();
 	/* after this point, any DPDK pointers will become dangling */
 	rte_eal_memory_detach();
+	eal_mp_dev_hotplug_cleanup();
 	rte_eal_alarm_cleanup();
 	rte_trace_save();
 	eal_trace_fini();