Bluetooth: Use explicit AMP controller id value for BR/EDR

The special AMP controller id 0 is reserved for the BR/EDR controller
that has the main link. It is a fixed value and so use a constant for
this throughout the code to make it more visible when the handling is
for the BR/EDR channel or when it is for the AMP channel.

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

3 files changed, 17 insertions, 17 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 8e3076ebb8ad..393eabc0d21f 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -64,7 +64,7 @@
 #define HCI_AMP         0x01
 
 /* First BR/EDR Controller shall have ID = 0 */
-#define HCI_BREDR_ID    0
+#define AMP_ID_BREDR    0x00
 
 /* AMP controller types */
 #define AMP_TYPE_BREDR  0x00
diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index b2ef3d392a0e..6d62d3140cf8 100644
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -77,7 +77,7 @@ u8 __next_ident(struct amp_mgr *mgr)
 
 static inline void __a2mp_cl_bredr(struct a2mp_cl *cl)
 {
-        cl->id = 0;
+        cl->id = AMP_ID_BREDR;
         cl->type = AMP_TYPE_BREDR;
         cl->status = 1;
 }
@@ -216,7 +216,7 @@ static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
                 BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type,
                        cl->status);
 
-                if (cl->id != HCI_BREDR_ID && cl->type == HCI_AMP) {
+                if (cl->id != AMP_ID_BREDR && cl->type == HCI_AMP) {
                         struct a2mp_info_req req;
 
                         found = true;
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 02dba4e6df96..b0208e20390c 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -3046,8 +3046,8 @@ int l2cap_ertm_init(struct l2cap_chan *chan)
 
         skb_queue_head_init(&chan->tx_q);
 
-        chan->local_amp_id = 0;
-        chan->move_id = 0;
+        chan->local_amp_id = AMP_ID_BREDR;
+        chan->move_id = AMP_ID_BREDR;
         chan->move_state = L2CAP_MOVE_STABLE;
         chan->move_role = L2CAP_MOVE_ROLE_NONE;
 
@@ -3100,7 +3100,7 @@ static inline bool __l2cap_efs_supported(struct l2cap_conn *conn)
 static void __l2cap_set_ertm_timeouts(struct l2cap_chan *chan,
                                       struct l2cap_conf_rfc *rfc)
 {
-        if (chan->local_amp_id && chan->hs_hcon) {
+        if (chan->local_amp_id != AMP_ID_BREDR && chan->hs_hcon) {
                 u64 ertm_to = chan->hs_hcon->hdev->amp_be_flush_to;
 
                 /* Class 1 devices have must have ERTM timeouts
@@ -3791,12 +3791,12 @@ static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
                                  * The connection will succeed after the
                                  * physical link is up.
                                  */
-                                if (amp_id) {
-                                        __l2cap_state_change(chan, BT_CONNECT2);
-                                        result = L2CAP_CR_PEND;
-                                } else {
+                                if (amp_id == AMP_ID_BREDR) {
                                         __l2cap_state_change(chan, BT_CONFIG);
                                         result = L2CAP_CR_SUCCESS;
+                                } else {
+                                        __l2cap_state_change(chan, BT_CONNECT2);
+                                        result = L2CAP_CR_PEND;
                                 }
                                 status = L2CAP_CS_NO_INFO;
                         }
@@ -4423,7 +4423,7 @@ static int l2cap_create_channel_req(struct l2cap_conn *conn,
         BT_DBG("psm 0x%2.2x, scid 0x%4.4x, amp_id %d", psm, scid, req->amp_id);
 
         /* For controller id 0 make BR/EDR connection */
-        if (req->amp_id == HCI_BREDR_ID) {
+        if (req->amp_id == AMP_ID_BREDR) {
                 l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP,
                               req->amp_id);
                 return 0;
@@ -4658,7 +4658,7 @@ void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
 
         if (chan->state != BT_CONNECTED) {
                 /* Ignore logical link if channel is on BR/EDR */
-                if (chan->local_amp_id)
+                if (chan->local_amp_id != AMP_ID_BREDR)
                         l2cap_logical_finish_create(chan, hchan);
         } else {
                 l2cap_logical_finish_move(chan, hchan);
@@ -4669,7 +4669,7 @@ void l2cap_move_start(struct l2cap_chan *chan)
 {
         BT_DBG("chan %p", chan);
 
-        if (chan->local_amp_id == HCI_BREDR_ID) {
+        if (chan->local_amp_id == AMP_ID_BREDR) {
                 if (chan->chan_policy != BT_CHANNEL_POLICY_AMP_PREFERRED)
                         return;
                 chan->move_role = L2CAP_MOVE_ROLE_INITIATOR;
@@ -4868,7 +4868,7 @@ static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
                 goto send_move_response;
         }
 
-        if (req->dest_amp_id) {
+        if (req->dest_amp_id != AMP_ID_BREDR) {
                 struct hci_dev *hdev;
                 hdev = hci_dev_get(req->dest_amp_id);
                 if (!hdev || hdev->dev_type != HCI_AMP ||
@@ -4898,7 +4898,7 @@ static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
         chan->move_id = req->dest_amp_id;
         icid = chan->dcid;
 
-        if (!req->dest_amp_id) {
+        if (req->dest_amp_id == AMP_ID_BREDR) {
                 /* Moving to BR/EDR */
                 if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
                         chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY;
@@ -5090,7 +5090,7 @@ static int l2cap_move_channel_confirm(struct l2cap_conn *conn,
         if (chan->move_state == L2CAP_MOVE_WAIT_CONFIRM) {
                 if (result == L2CAP_MC_CONFIRMED) {
                         chan->local_amp_id = chan->move_id;
-                        if (!chan->local_amp_id)
+                        if (chan->local_amp_id == AMP_ID_BREDR)
                                 __release_logical_link(chan);
                 } else {
                         chan->move_id = chan->local_amp_id;
@@ -5130,7 +5130,7 @@ static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn,
         if (chan->move_state == L2CAP_MOVE_WAIT_CONFIRM_RSP) {
                 chan->local_amp_id = chan->move_id;
 
-                if (!chan->local_amp_id && chan->hs_hchan)
+                if (chan->local_amp_id == AMP_ID_BREDR && chan->hs_hchan)
                         __release_logical_link(chan);
 
                 l2cap_move_done(chan);