diff options
| author | Samuel Holland <samuel@sholland.org> | 2020-08-01 11:29:56 -0500 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2020-08-02 20:01:27 +0200 |
| commit | 3b799254cf6f481460719023d7a18f46651e5e7f (patch) | |
| tree | 5238dbbf0c635d33860202cb58f3fbefb3307731 | |
| parent | b5f628a20af9044a9951310918732d1e6d83b476 (diff) | |
Bluetooth: hci_uart: Cancel init work before unregistering
If hci_uart_tty_close() or hci_uart_unregister_device() is called while
hu->init_ready is scheduled, hci_register_dev() could be called after
the hci_uart is torn down. Avoid this by ensuring the work is complete
or canceled before checking the HCI_UART_REGISTERED flag.
Fixes: 9f2aee848fe6 ("Bluetooth: Add delayed init sequence support for UART controllers")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | drivers/bluetooth/hci_ldisc.c | 1 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_serdev.c | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 85a30fb9177b..f83d67eafc9f 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -538,6 +538,7 @@ static void hci_uart_tty_close(struct tty_struct *tty) clear_bit(HCI_UART_PROTO_READY, &hu->flags); percpu_up_write(&hu->proto_lock); + cancel_work_sync(&hu->init_ready); cancel_work_sync(&hu->write_work); if (hdev) { diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c index 7b233312e723..3977bba485c2 100644 --- a/drivers/bluetooth/hci_serdev.c +++ b/drivers/bluetooth/hci_serdev.c @@ -355,6 +355,8 @@ void hci_uart_unregister_device(struct hci_uart *hu) struct hci_dev *hdev = hu->hdev; clear_bit(HCI_UART_PROTO_READY, &hu->flags); + + cancel_work_sync(&hu->init_ready); if (test_bit(HCI_UART_REGISTERED, &hu->flags)) hci_unregister_dev(hdev); hci_free_dev(hdev); |