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034e38e8f6
Use the port write fifo and generic chars_and_buffer and write_room implementations when writing. This not only allows for more efficient transfers, but more importantly fixes the remaining issues related to the conservative write_room() implementation which could prevent the line discipline from making forward progress (e.g. waiting for n > 1 bytes of space to become available). Note that this also allows using the driver for the system console without dropping data when the write URB is busy (including when adding carriage return on line feed). Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Johan Hovold <johan@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.