Bluetooth: Temporarily stop background scanning on discovery

If the user sends a mgmt start discovery command while the background
scanning is running, we should temporarily stop it. Once the discovery
finishes, we start the background scanning again.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

2 files changed, 8 insertions, 6 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 89ff09249eee..507a137a584b 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1786,6 +1786,8 @@ void hci_discovery_set_state(struct hci_dev *hdev, int state)
 
         switch (state) {
         case DISCOVERY_STOPPED:
+                hci_update_background_scan(hdev);
+
                 if (hdev->discovery.state != DISCOVERY_STARTING)
                         mgmt_discovering(hdev, 0);
                 break;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index bad23d5fdd35..a62e22ca73a1 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3439,12 +3439,12 @@ static int start_discovery(struct sock *sk, struct hci_dev *hdev,
                         goto failed;
                 }
 
-                if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) {
-                        err = cmd_status(sk, hdev->id, MGMT_OP_START_DISCOVERY,
-                                         MGMT_STATUS_BUSY);
-                        mgmt_pending_remove(cmd);
-                        goto failed;
-                }
+                /* If controller is scanning, it means the background scanning
+                 * is running. Thus, we should temporarily stop it in order to
+                 * set the discovery scanning parameters.
+                 */
+                if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
+                        hci_req_add_le_scan_disable(&req);
 
                 memset(&param_cp, 0, sizeof(param_cp));