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Bluetooth: hci_nokia: prevent crash on module removal

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Only cancel any ongoing work after making sure, that no new work
can be scheduled. This fixes a race condition in the remove handler.

Signed-off-by: Ian Molton <ian@mnementh.co.uk>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Ian Molton 2017-07-08 14:43:34 +01:00 committed by Marcel Holtmann
parent 2193a9800b
commit ca2eae7d25
1 changed files with 3 additions and 1 deletions
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4
drivers/bluetooth/hci_nokia.c
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@ -770,10 +770,12 @@ static void nokia_bluetooth_serdev_remove(struct serdev_device *serdev)
struct hci_uart *hu = &btdev->hu;
struct hci_dev *hdev = hu->hdev;
cancel_work_sync(&hu->write_work);
hci_unregister_dev(hdev);
hci_free_dev(hdev);
cancel_work_sync(&hu->write_work);
hu->proto->close(hu);
pm_runtime_disable(&btdev->serdev->dev);