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[ Upstream commit 5ad865862a0fd349163243e1834ed98ba9b81905 ] The NTB epf host driver assumes the BAR number associated with a memory window is just incremented from the BAR number associated with MW1. This seems to have been enough so far but this is not really how the endpoint side work and the two could easily become mis-aligned. ntb_epf_mw_to_bar() even assumes that the BAR number is the memory window index + 2, which means the function only returns a proper result if BAR_2 is associated with MW1. Instead, fully describe and allow arbitrary NTB BAR mapping. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> Signed-off-by: Sasha Levin <sashal@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.