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The bit mask changes in commit6e14f7c1f2("tty: xuartps: Improve startup function") doesn't do what the commit message advertises. The original behaviour was clearing the RX_DIS bit, but due to missing ~, that bit is now the only bit kept. Currently, the regression is harmless, because the previous write to the control register sets it to TXRST | RXRST. Thus the RX_DIS bit is previously cleared. The *RST bits are cleared by the hardware, so this commit does not currently change behaviour, but makes future changes less risky. Link: https://www.spinics.net/lists/linux-serial/msg23157.html Signed-off-by: Helmut Grohne <h.grohne@intenta.de> Fixes:6e14f7c1f2("tty: xuartps: Improve startup function") Reviewed-by: Sören Brinkmann <soren.brinkmann@xilinx.com> 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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.