Bluetooth: AMP: Send A2MP Create Phylink Rsp after Assoc write

Postpone sending A2MP Create Phylink Response until we got successful
HCI Command Complete after HCI Write Remote AMP Assoc.

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

diff --git a/include/net/bluetooth/a2mp.h b/include/net/bluetooth/a2mp.h
index 42f2176..8b39327 100644 (file)
--- a/include/net/bluetooth/a2mp.h
+++ b/include/net/bluetooth/a2mp.h
@@ -23,6 +23,7 @@ enum amp_mgr_state {
        READ_LOC_AMP_INFO,
        READ_LOC_AMP_ASSOC,
        READ_LOC_AMP_ASSOC_FINAL,
+       WRITE_REMOTE_AMP_ASSOC,
 };
 
 struct amp_mgr {
@@ -144,5 +145,6 @@ void a2mp_discover_amp(struct l2cap_chan *chan);
 void a2mp_send_getinfo_rsp(struct hci_dev *hdev);
 void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);
 void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);
+void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status);
 
 #endif /* __A2MP_H */

diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index 2f67d5e..a200edf 100644 (file)
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -499,8 +499,16 @@ send_rsp:
        if (hdev)
                hci_dev_put(hdev);
 
-       a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, sizeof(rsp),
-                 &rsp);
+       /* Reply error now and success after HCI Write Remote AMP Assoc
+          command complete with success status
+        */
+       if (rsp.status != A2MP_STATUS_SUCCESS) {
+               a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident,
+                         sizeof(rsp), &rsp);
+       } else {
+               mgr->state = WRITE_REMOTE_AMP_ASSOC;
+               mgr->ident = hdr->ident;
+       }
 
        skb_pull(skb, le16_to_cpu(hdr->len));
        return 0;
@@ -949,6 +957,32 @@ clean:
        kfree(req);
 }
 
+void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status)
+{
+       struct amp_mgr *mgr;
+       struct a2mp_physlink_rsp rsp;
+       struct hci_conn *hs_hcon;
+
+       mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC);
+       if (!mgr)
+               return;
+
+       hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT);
+       if (!hs_hcon) {
+               rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
+       } else {
+               rsp.remote_id = hs_hcon->remote_id;
+               rsp.status = A2MP_STATUS_SUCCESS;
+       }
+
+       BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon,
+              status);
+
+       rsp.local_id = hdev->id;
+       a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp);
+       amp_mgr_put(mgr);
+}
+
 void a2mp_discover_amp(struct l2cap_chan *chan)
 {
        struct l2cap_conn *conn = chan->conn;

diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c
index 1b0d92c..5228657 100644 (file)
--- a/net/bluetooth/amp.c
+++ b/net/bluetooth/amp.c
@@ -317,7 +317,9 @@ void amp_write_rem_assoc_continue(struct hci_dev *hdev, u8 handle)
        if (!hcon)
                return;
 
-       amp_write_rem_assoc_frag(hdev, hcon);
+       /* Send A2MP create phylink rsp when all fragments are written */
+       if (amp_write_rem_assoc_frag(hdev, hcon))
+               a2mp_send_create_phy_link_rsp(hdev, 0);
 }
 
 void amp_write_remote_assoc(struct hci_dev *hdev, u8 handle)