[PATCH 4.19 106/168] Bluetooth: hci_serdev: Only unregister device if it was registered

Greg Kroah-Hartman
2020-08-17T17:43:04Z

From: Nicolas Boichat <drinkcat@chromium.org>

[ 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@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 46e20444ba19b..d3fb0d657fa52 100644
--- a/drivers/bluetooth/hci_serdev.c
+++ b/drivers/bluetooth/hci_serdev.c
@@ -369,7 +369,8 @@ 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