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[PATCH] bluetooth l2cap: fix locking in l2cap_global_chan_by_psm

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From: Johannes Berg <johannes.berg@xxxxxxxxx>

read_lock() ... read_unlock_bh() is clearly bogus.
This was broken by

commit 23691d75cdc69c3b285211b4d77746aa20a17d18
Author: Gustavo F. Padovan <padovan@xxxxxxxxxxxxxx>
Date:   Wed Apr 27 18:26:32 2011 -0300

    Bluetooth: Remove l2cap_sk_list

Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
 net/bluetooth/l2cap_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/bluetooth/l2cap_core.c	2011-06-01 08:27:44.000000000 +0200
+++ b/net/bluetooth/l2cap_core.c	2011-06-01 08:27:51.000000000 +0200
@@ -906,7 +906,7 @@ static struct l2cap_chan *l2cap_global_c
 		if (c->psm == psm) {
 			/* Exact match. */
 			if (!bacmp(&bt_sk(sk)->src, src)) {
-				read_unlock_bh(&chan_list_lock);
+				read_unlock(&chan_list_lock);
 				return c;
 			}
 


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