Bluetooth: Simplify the error handling of Start Discovery command

The Start Discovery command has some complicated code when it comes
to error handling. With the future introduction of Start Service
Discovery simplifying this makes it easier to read.

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

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 77cf0ef0d8a31cff859bb8352a7fe290b8f0cb65..f3296371a310c5bef4a82182b39a97f3f829a666 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3771,14 +3771,8 @@ static int start_discovery(struct sock *sk, struct hci_dev *hdev,
                goto failed;
        }
 
-       if (test_bit(HCI_PERIODIC_INQ, &hdev->dev_flags)) {
-               err = cmd_complete(sk, hdev->id, MGMT_OP_START_DISCOVERY,
-                                  MGMT_STATUS_BUSY, &cp->type,
-                                  sizeof(cp->type));
-               goto failed;
-       }
-
-       if (hdev->discovery.state != DISCOVERY_STOPPED) {
+       if (hdev->discovery.state != DISCOVERY_STOPPED ||
+           test_bit(HCI_PERIODIC_INQ, &hdev->dev_flags)) {
                err = cmd_complete(sk, hdev->id, MGMT_OP_START_DISCOVERY,
                                   MGMT_STATUS_BUSY, &cp->type,
                                   sizeof(cp->type));
@@ -3909,10 +3903,12 @@ static int start_discovery(struct sock *sk, struct hci_dev *hdev,
        }
 
        err = hci_req_run(&req, start_discovery_complete);
-       if (err < 0)
+       if (err < 0) {
                mgmt_pending_remove(cmd);
-       else
-               hci_discovery_set_state(hdev, DISCOVERY_STARTING);
+               goto failed;
+       }
+
+       hci_discovery_set_state(hdev, DISCOVERY_STARTING);
 
 failed:
        hci_dev_unlock(hdev);