Bluetooth: LE-L2CAP-COC on M.

LE L2CAP Connection Oriented Channel implementation for
credit based flow control on LE L2CAP.

- This feature is enabled only when BLE feature is enabled.
- Handled signalling commands on channel id 5 to establish
  the connection of LE COC.
- Implemented the SM for LE L2CAP channel to handle events
  from App layer and hci layer.
- Introduced security levels for LE L2CAP channels.
- Introduced tranport variable for major functions where
  BREDR and LE shares common data structures.
- Implemented segmentation and reassembly of LE L2CAP SDU.
- Introduced congestion mechanism for LE L2CAP channel
- As the new LE L2CAP callbacks not required for existing
  BREDR services, made it as null for newly introduced
  LE L2CAP callbacks.
- New APIs introduced for LE L2CAP connection establishment.
- New APIs provided for LE L2CAP security procedure.
- Relevent L2cap APIs from Test app interface exposed to the
  test tool.
- New macros, definitions, structures introduced for LE L2CAP
  channel establishment/data tranfer.

CRs-Fixed: 776657
Change-Id: I50a24374659f9802cbc92421db139f75f2790f2e

1 files changed, 5 insertions, 0 deletions

diff --git a/stack/btu/btu_task.c b/stack/btu/btu_task.c
index e2b899efd..40132ac87 100644
--- a/stack/btu/btu_task.c
+++ b/stack/btu/btu_task.c
@@ -324,6 +324,11 @@ void btu_task_shut_down(UNUSED_ATTR void *context) {
 
   bta_sys_free();
   btu_free_core();
+
+#if (defined(LE_L2CAP_CFC_INCLUDED) && (LE_L2CAP_CFC_INCLUDED == TRUE))
+    l2c_cleanup();
+#endif
+
 }
 
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