From: Paul Bolle <pebolle@tiscali.nl>
Date: Fri, 31 Jul 2015 12:08:58 +0000 (+0200)
Subject: windfarm: decrement client count when unregistering
X-Git-Tag: v3.4.112~82
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=28709fcfc6ed7b6e38d5bb47316fcaf6c33667f7;p=thirdparty%2Fkernel%2Fstable.git

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: Zefan Li <lizefan@huawei.com>
---

diff --git a/drivers/macintosh/windfarm_core.c b/drivers/macintosh/windfarm_core.c
index ce8897933a84d..004fa10896fd1 100644
--- 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);