linux-kernel - [PATCH 3.4 11/92] windfarm: decrement client count when unregistering

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Date:	Mon, 18 Apr 2016 18:45:16 +0800
From:	lizf@...nel.org
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Paul Bolle <pebolle@...cali.nl>,
	Michael Ellerman <mpe@...erman.id.au>,
	Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 11/92] windfarm: decrement client count when unregistering

From: Paul Bolle <pebolle@...cali.nl>

3.4.112-rc1 review patch.  If anyone has any objections, please let me know.

------------------


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@...cali.nl>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/macintosh/windfarm_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/macintosh/windfarm_core.c b/drivers/macintosh/windfarm_core.c
index ce88979..004fa10 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);
-- 
1.9.1