Bluetooth: Fix notifying discovery state upon reset

When HCI_Reset is issued the discovery state is assumed to be stopped.
The hci_cc_reset() handler was trying to set the state but it was doing
it without using the hci_discovery_set_state() function. Because of this
e.g. the mgmt Discovering event could go without being sent. This patch
fixes the code to use the hci_discovery_set_state() function instead of
just blindly setting the state value.
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_event.c

@@ -200,7 +200,8 @@ static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
 	/* Reset all non-persistent flags */
 	hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
 
-	hdev->discovery.state = DISCOVERY_STOPPED;
+	hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+
 	hdev->inq_tx_power = HCI_TX_POWER_INVALID;
 	hdev->adv_tx_power = HCI_TX_POWER_INVALID;