[PATCH 4.14 120/228] Bluetooth: hci_serdev: Only unregister device if it was registered

[Greg Kroah-Hartman]

From: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>

[ Upstream commit 202798db9570104728dce8bb57dfeed47ce764bc ]

We should not call hci_unregister_dev if the device was not
successfully registered.

Fixes: c34dc3bfa7642fd ("Bluetooth: hci_serdev: Introduce hci_uart_unregister_device()")
Signed-off-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/bluetooth/hci_serdev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c
index 69c00a3db5382..72cf2d97b682c 100644
--- a/drivers/bluetooth/hci_serdev.c
+++ b/drivers/bluetooth/hci_serdev.c
@@ -361,7 +361,8 @@ void hci_uart_unregister_device(struct hci_uart *hu)
 	struct hci_dev *hdev = hu->hdev;
 
 	clear_bit(HCI_UART_PROTO_READY, &hu->flags);
-	hci_unregister_dev(hdev);
+	if (test_bit(HCI_UART_REGISTERED, &hu->flags))
+		hci_unregister_dev(hdev);
 	hci_free_dev(hdev);
 
 	cancel_work_sync(&hu->write_work);
-- 
2.25.1