Bluetooth: Process Create Chan Request

Add processing L2CAP Create Chan Request. When channel is created
save associated high speed link hs_hcon.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

1 files changed, 43 insertions, 20 deletions

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index bdffc4c207b5..2f0e165eef4d 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -4237,7 +4237,9 @@ static int l2cap_create_channel_req(struct l2cap_conn *conn,
                                     u16 cmd_len, void *data)
 {
         struct l2cap_create_chan_req *req = data;
+        struct l2cap_create_chan_rsp rsp;
         struct l2cap_chan *chan;
+        struct hci_dev *hdev;
         u16 psm, scid;
 
         if (cmd_len != sizeof(*req))
@@ -4251,36 +4253,57 @@ 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);
 
-        if (req->amp_id) {
-                struct hci_dev *hdev;
-
-                /* Validate AMP controller id */
-                hdev = hci_dev_get(req->amp_id);
-                if (!hdev || hdev->dev_type != HCI_AMP ||
-                    !test_bit(HCI_UP, &hdev->flags)) {
-                        struct l2cap_create_chan_rsp rsp;
+        /* For controller id 0 make BR/EDR connection */
+        if (req->amp_id == HCI_BREDR_ID) {
+                l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP,
+                              req->amp_id);
+                return 0;
+        }
 
-                        rsp.dcid = 0;
-                        rsp.scid = cpu_to_le16(scid);
-                        rsp.result = __constant_cpu_to_le16(L2CAP_CR_BAD_AMP);
-                        rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO);
+        /* Validate AMP controller id */
+        hdev = hci_dev_get(req->amp_id);
+        if (!hdev)
+                goto error;
 
-                        l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP,
-                                       sizeof(rsp), &rsp);
+        if (hdev->dev_type != HCI_AMP || !test_bit(HCI_UP, &hdev->flags)) {
+                hci_dev_put(hdev);
+                goto error;
+        }
 
-                        if (hdev)
-                                hci_dev_put(hdev);
+        chan = l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP,
+                             req->amp_id);
+        if (chan) {
+                struct amp_mgr *mgr = conn->hcon->amp_mgr;
+                struct hci_conn *hs_hcon;
 
-                        return 0;
+                hs_hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, conn->dst);
+                if (!hs_hcon) {
+                        hci_dev_put(hdev);
+                        return -EFAULT;
                 }
 
-                hci_dev_put(hdev);
+                BT_DBG("mgr %p bredr_chan %p hs_hcon %p", mgr, chan, hs_hcon);
+
+                chan->local_amp_id = req->amp_id;
+                mgr->bredr_chan = chan;
+                chan->hs_hcon = hs_hcon;
+                conn->mtu = hdev->block_mtu;
         }
 
-        chan = l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP,
-                             req->amp_id);
+        hci_dev_put(hdev);
 
         return 0;
+
+error:
+        rsp.dcid = 0;
+        rsp.scid = cpu_to_le16(scid);
+        rsp.result = __constant_cpu_to_le16(L2CAP_CR_BAD_AMP);
+        rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO);
+
+        l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP,
+                       sizeof(rsp), &rsp);
+
+        return -EFAULT;
 }
 
 static void l2cap_send_move_chan_req(struct l2cap_chan *chan, u8 dest_amp_id)