[PATCH] net: bluetooth: fix locking problem

If alloc_skb() failed we still hold hci_dev_list_lock.  The code should
unlock it before exit.

Signed-off-by: Vasiliy Kulikov <redacted>
---
 Compile tested only.

 net/bluetooth/mgmt.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index f827fd9..ace8726 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c

@@ -111,8 +111,10 @@ static int read_index_list(struct sock *sk)

       body_len = sizeof(*ev) + sizeof(*rp) + (2 * count);
       skb = alloc_skb(sizeof(*hdr) + body_len, GFP_ATOMIC);
-       if (!skb)
+       if (!skb) {
+               read_unlock(&hci_dev_list_lock);
               return -ENOMEM;
+       }