From: Javier Cardona <javier@cozybit.com>
Date: Tue, 9 Aug 2011 23:45:06 +0000 (-0700)
Subject: mac80211: mesh locking fixes
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a6965c44e981214c7483e020106a30a869411231;p=openwrt%2Fstaging%2Fblogic.git

mac80211: mesh locking fixes

mesh_queue_preq is invoked invoked from both user (work queue) and
softirq (timer) context, so the _bh version of spinlock needs to be
used. Also, the mpath->state_lock should be softirq safe as well.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index bfd7638e235f..385f9fc526db 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -654,12 +654,12 @@ int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata)
 		mpath = node->mpath;
 		if (mpath->sdata == sdata &&
 		    memcmp(addr, mpath->dst, ETH_ALEN) == 0) {
-			spin_lock(&mpath->state_lock);
+			spin_lock_bh(&mpath->state_lock);
 			mpath->flags |= MESH_PATH_RESOLVING;
 			hlist_del_rcu(&node->list);
 			call_rcu(&node->rcu, mesh_path_node_reclaim);
 			atomic_dec(&tbl->entries);
-			spin_unlock(&mpath->state_lock);
+			spin_unlock_bh(&mpath->state_lock);
 			goto enddel;
 		}
 	}