windfarm: decrement client count when unregistering
Paul Bolle [Fri, 31 Jul 2015 12:08:58 +0000 (14:08 +0200)]
commit fe2b592173ff0274e70dc44d1d28c19bb995aa7c upstream.

wf_unregister_client() increments the client count when a client
unregisters. That is obviously incorrect. Decrement that client count
instead.

Fixes: 75722d3992f5 ("[PATCH] ppc64: Thermal control for SMU based machines")

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/macintosh/windfarm_core.c

index 3ee198b..cc7ece1 100644 (file)
@@ -435,7 +435,7 @@ int wf_unregister_client(struct notifier_block *nb)
 {
        mutex_lock(&wf_lock);
        blocking_notifier_chain_unregister(&wf_client_list, nb);
-       wf_client_count++;
+       wf_client_count--;
        if (wf_client_count == 0)
                wf_stop_thread();
        mutex_unlock(&wf_lock);