From: Alexander Aring <alex.aring@gmail.com>
Date: Wed, 12 Nov 2014 02:36:50 +0000 (+0100)
Subject: mac820154: move mutex locks out of loop
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2789e6297f8fd4943b8d63599a75c3e1cf4f8517;p=linux-beck.git

mac820154: move mutex locks out of loop

Instead of always re-lock the iflist_mtx at multiple interfaces we lock
the complete for each loop at start and at the end.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
---

diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index 8b21d201fc97..85d215562b4a 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -540,11 +540,11 @@ void ieee802154_remove_interfaces(struct ieee802154_local *local)
 {
 	struct ieee802154_sub_if_data *sdata, *tmp;
 
+	mutex_lock(&local->iflist_mtx);
 	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
-		mutex_lock(&sdata->local->iflist_mtx);
 		list_del(&sdata->list);
-		mutex_unlock(&sdata->local->iflist_mtx);
 
 		unregister_netdevice(sdata->dev);
 	}
+	mutex_unlock(&local->iflist_mtx);
 }