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dfe40ca486
Currently the driver only assigns remote port for the primary port if in case of dual link. This makes things such as walking from one port to another more complex than necessary because the code needs to change from secondary to primary port if the path that is established is created using secondary links. In order to always assign both remote pointers we need to prevent the scanning code from following the secondary link. Failing to do that might cause problems as the same switch may be enumerated twice (or removed in case of unplug). Handle that properly by introducing a new function tb_port_has_remote() that returns true only for the primary port. We also update tb_is_upstream_port() to support both dual link ports, make it take const port pointer and move it below tb_upstream_port() to keep similar functions close. Signed-off-by: Mika Westerberg <mika.westerberg@linux.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 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.