Merge tag 'samsung-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux...

[cascardo/linux.git] / net / bluetooth / mgmt.c

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 0fce544..af8e0a6 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1047,6 +1047,43 @@ static void clean_up_hci_complete(struct hci_dev *hdev, u8 status)
        }
 }
 
+static void hci_stop_discovery(struct hci_request *req)
+{
+       struct hci_dev *hdev = req->hdev;
+       struct hci_cp_remote_name_req_cancel cp;
+       struct inquiry_entry *e;
+
+       switch (hdev->discovery.state) {
+       case DISCOVERY_FINDING:
+               if (test_bit(HCI_INQUIRY, &hdev->flags)) {
+                       hci_req_add(req, HCI_OP_INQUIRY_CANCEL, 0, NULL);
+               } else {
+                       cancel_delayed_work(&hdev->le_scan_disable);
+                       hci_req_add_le_scan_disable(req);
+               }
+
+               break;
+
+       case DISCOVERY_RESOLVING:
+               e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
+                                                    NAME_PENDING);
+               if (!e)
+                       return;
+
+               bacpy(&cp.bdaddr, &e->data.bdaddr);
+               hci_req_add(req, HCI_OP_REMOTE_NAME_REQ_CANCEL, sizeof(cp),
+                           &cp);
+
+               break;
+
+       default:
+               /* Passive scanning */
+               if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
+                       hci_req_add_le_scan_disable(req);
+               break;
+       }
+}
+
 static int clean_up_hci_state(struct hci_dev *hdev)
 {
        struct hci_request req;
@@ -1063,9 +1100,7 @@ static int clean_up_hci_state(struct hci_dev *hdev)
        if (test_bit(HCI_ADVERTISING, &hdev->dev_flags))
                disable_advertising(&req);
 
-       if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) {
-               hci_req_add_le_scan_disable(&req);
-       }
+       hci_stop_discovery(&req);
 
        list_for_each_entry(conn, &hdev->conn_hash.list, list) {
                struct hci_cp_disconnect dc;
@@ -2996,8 +3031,13 @@ static int user_pairing_resp(struct sock *sk, struct hci_dev *hdev,
        }
 
        if (addr->type == BDADDR_LE_PUBLIC || addr->type == BDADDR_LE_RANDOM) {
-               /* Continue with pairing via SMP */
+               /* Continue with pairing via SMP. The hdev lock must be
+                * released as SMP may try to recquire it for crypto
+                * purposes.
+                */
+               hci_dev_unlock(hdev);
                err = smp_user_confirm_reply(conn, mgmt_op, passkey);
+               hci_dev_lock(hdev);
 
                if (!err)
                        err = cmd_complete(sk, hdev->id, mgmt_op,
@@ -3574,8 +3614,6 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
 {
        struct mgmt_cp_stop_discovery *mgmt_cp = data;
        struct pending_cmd *cmd;
-       struct hci_cp_remote_name_req_cancel cp;
-       struct inquiry_entry *e;
        struct hci_request req;
        int err;
 
@@ -3605,52 +3643,22 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
 
        hci_req_init(&req, hdev);
 
-       switch (hdev->discovery.state) {
-       case DISCOVERY_FINDING:
-               if (test_bit(HCI_INQUIRY, &hdev->flags)) {
-                       hci_req_add(&req, HCI_OP_INQUIRY_CANCEL, 0, NULL);
-               } else {
-                       cancel_delayed_work(&hdev->le_scan_disable);
-
-                       hci_req_add_le_scan_disable(&req);
-               }
-
-               break;
+       hci_stop_discovery(&req);
 
-       case DISCOVERY_RESOLVING:
-               e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
-                                                    NAME_PENDING);
-               if (!e) {
-                       mgmt_pending_remove(cmd);
-                       err = cmd_complete(sk, hdev->id,
-                                          MGMT_OP_STOP_DISCOVERY, 0,
-                                          &mgmt_cp->type,
-                                          sizeof(mgmt_cp->type));
-                       hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
-                       goto unlock;
-               }
-
-               bacpy(&cp.bdaddr, &e->data.bdaddr);
-               hci_req_add(&req, HCI_OP_REMOTE_NAME_REQ_CANCEL, sizeof(cp),
-                           &cp);
-
-               break;
-
-       default:
-               BT_DBG("unknown discovery state %u", hdev->discovery.state);
-
-               mgmt_pending_remove(cmd);
-               err = cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY,
-                                  MGMT_STATUS_FAILED, &mgmt_cp->type,
-                                  sizeof(mgmt_cp->type));
+       err = hci_req_run(&req, stop_discovery_complete);
+       if (!err) {
+               hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
                goto unlock;
        }
 
-       err = hci_req_run(&req, stop_discovery_complete);
-       if (err < 0)
-               mgmt_pending_remove(cmd);
-       else
-               hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
+       mgmt_pending_remove(cmd);
+
+       /* If no HCI commands were sent we're done */
+       if (err == -ENODATA) {
+               err = cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY, 0,
+                                  &mgmt_cp->type, sizeof(mgmt_cp->type));
+               hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+       }
 
 unlock:
        hci_dev_unlock(hdev);