windfarm: decrement client count when unregistering

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: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/macintosh/windfarm_core.c b/drivers/macintosh/windfarm_core.c
index ce8897933a84daeccddd318438b939face4aec8f..004fa10896fd1415d5c3f0f89b482f6fdc22ea49 100644 (file)
--- a/drivers/macintosh/windfarm_core.c
+++ b/drivers/macintosh/windfarm_core.c
@@ -421,7 +421,7 @@ 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);