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When rs485 transmission over an 8250 port stops, __stop_tx() assigns active_timer = NULL before calling __stop_tx_rs485(). That function in turn either assigns active_timer = stop_tx_timer and rearms the timer (in case a delay_rts_after_send needs to be observed) or directly calls __do_stop_tx_rs485(). Move the assignment active_timer = NULL to __stop_tx_rs485() into the branch which directly calls __do_stop_tx_rs485(), thereby avoiding a duplicate assignment and simplifying the code. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Matwey V. Kornilov <matwey@sai.msu.ru> Link: https://lore.kernel.org/r/bca638405550eaf92f0c6060b553b687f35885e0.1582895077.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.