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01622e9a53
Previously, h5_open() called h5_link_control() to send a SYNC message. But h5_link_control() only enqueues the packet and requires the caller to call hci_uart_tx_wakeup(). Thus, after H5_SYNC_TIMEOUT ran out (100ms), h5_timed_event() would be called and, realizing that the state was still H5_UNINITIALIZED, it would re-enqueue the SYNC and call hci_uart_tx_wakeup(). Consequently, two SYNC packets would be sent and initialization would unnecessarily wait for 100ms. The naive solution of calling hci_uart_tx_wakeup() in h5_open() does not work because it will only schedule tx work if the HCI_PROTO_READY bit is set and hci_serdev only sets it after h5_open() returns. This patch removes the extraneous SYNC being enqueued and makes h5_timed_event() wake up on the next jiffy. Signed-off-by: Javier Nieto <jgnieto@cs.stanford.edu> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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 reStructuredText 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.