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[ Upstream commit3b799254cf] 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:9f2aee848f("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> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.