Bluetooth: Fix reason code used for rejecting SCO connections

The core specification defines valid values for the
HCI_Reject_Synchronous_Connection_Request command to be 0x0D-0x0F. So
far the code has been using HCI_ERROR_REMOTE_USER_TERM (0x13) which is
not a valid value and is therefore being rejected by some controllers:

 > HCI Event: Connect Request (0x04) plen 10
	bdaddr 40:6F:2A:6A:E5:E0 class 0x000000 type eSCO
 < HCI Command: Reject Synchronous Connection (0x01|0x002a) plen 7
	bdaddr 40:6F:2A:6A:E5:E0 reason 0x13
	Reason: Remote User Terminated Connection
 > HCI Event: Command Status (0x0f) plen 4
	Reject Synchronous Connection (0x01|0x002a) status 0x12 ncmd 1
	Error: Invalid HCI Command Parameters

This patch introduces a new define for a value from the valid range
(0x0d == Connection Rejected Due To Limited Resources) and uses it
instead for rejecting incoming connections.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

2 files changed, 2 insertions, 1 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 3f8547f1c6f8..6e8f24967308 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -385,6 +385,7 @@ enum {
 #define HCI_ERROR_AUTH_FAILURE          0x05
 #define HCI_ERROR_MEMORY_EXCEEDED       0x07
 #define HCI_ERROR_CONNECTION_TIMEOUT    0x08
+#define HCI_ERROR_REJ_LIMITED_RESOURCES 0x0d
 #define HCI_ERROR_REJ_BAD_ADDR          0x0f
 #define HCI_ERROR_REMOTE_USER_TERM      0x13
 #define HCI_ERROR_REMOTE_LOW_RESOURCES  0x14
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 22b253750f78..445829cd363c 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -121,7 +121,7 @@ static void hci_reject_sco(struct hci_conn *conn)
 {
         struct hci_cp_reject_sync_conn_req cp;
 
-        cp.reason = HCI_ERROR_REMOTE_USER_TERM;
+        cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
         bacpy(&cp.bdaddr, &conn->dst);
 
         hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp);