[Bluetooth] Always include MTU in L2CAP config responses

When sending a positive config response it shall include the actual
MTU to be used on this channel. This differs from the Bluetooth 1.1
specification where it was enough to acknowledge the config request.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 2b3dcb8f90fa..c09d4a20d696 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1353,12 +1353,12 @@ static inline int l2cap_conf_output(struct sock *sk, void **ptr)
 
         /* Configure output options and let the other side know
          * which ones we don't like. */
-        if (pi->conf_mtu < pi->omtu) {
-                l2cap_add_conf_opt(ptr, L2CAP_CONF_MTU, 2, pi->omtu);
+        if (pi->conf_mtu < pi->omtu)
                 result = L2CAP_CONF_UNACCEPT;
-        } else {
+        else
                 pi->omtu = pi->conf_mtu;
-        }
+
+        l2cap_add_conf_opt(ptr, L2CAP_CONF_MTU, 2, pi->omtu);
 
         BT_DBG("sk %p result %d", sk, result);
         return result;