Bluetooth: Fix return value in hci_dev_do_close()

hci_error_reset() return without calling hci_dev_do_open() when
hci_dev_do_close() return error value which is not 0.

Also, hci_dev_close() return hci_dev_do_close() function's return
value.

But, hci_dev_do_close() return always 0 even if hdev->shutdown
return error value. So, fix hci_dev_do_close() to save and return
the return value of the hdev->shutdown when it is called.
Signed-off-by: NKangmin Park <l4stpr0gr4m@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_core.c

@@ -1724,6 +1724,7 @@ static void hci_pend_le_actions_clear(struct hci_dev *hdev)
 int hci_dev_do_close(struct hci_dev *hdev)
 {
 	bool auto_off;
+	int err = 0;
 
 	BT_DBG("%s %p", hdev->name, hdev);
 
@@ -1738,13 +1739,13 @@ int hci_dev_do_close(struct hci_dev *hdev)
 	    test_bit(HCI_UP, &hdev->flags)) {
 		/* Execute vendor specific shutdown routine */
 		if (hdev->shutdown)
-			hdev->shutdown(hdev);
+			err = hdev->shutdown(hdev);
 	}
 
 	if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
 		cancel_delayed_work_sync(&hdev->cmd_timer);
 		hci_req_sync_unlock(hdev);
-		return 0;
+		return err;
 	}
 
 	hci_leds_update_powered(hdev, false);
@@ -1851,7 +1852,7 @@ int hci_dev_do_close(struct hci_dev *hdev)
 	hci_req_sync_unlock(hdev);
 
 	hci_dev_put(hdev);
-	return 0;
+	return err;
 }
 
 int hci_dev_close(__u16 dev)