From: Christian Gromm <christian.gromm@microchip.com>
Date: Tue, 22 Dec 2015 09:52:54 +0000 (+0100)
Subject: staging: most: move mutex
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=245dc23d2368beada77d9bc26f3292fa34931655;p=deliverable%2Flinux.git

staging: most: move mutex

This patch removes mutex from code that doesn't need any locking.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/most/mostcore/core.c b/drivers/staging/most/mostcore/core.c
index 21c550ccfe78..ae1b5778b24b 100644
--- a/drivers/staging/most/mostcore/core.c
+++ b/drivers/staging/most/mostcore/core.c
@@ -1830,15 +1830,14 @@ void most_deregister_interface(struct most_interface *iface)
 	struct most_inst_obj *i = iface->priv;
 	struct most_c_obj *c;
 
-	mutex_lock(&deregister_mutex);
 	if (unlikely(!i)) {
 		pr_info("Bad Interface\n");
-		mutex_unlock(&deregister_mutex);
 		return;
 	}
 	pr_info("deregistering MOST device %s (%s)\n", i->kobj.name,
 		iface->description);
 
+	mutex_lock(&deregister_mutex);
 	atomic_set(&i->tainted, 1);
 	mutex_unlock(&deregister_mutex);