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The DbC context is different from the xhci device context. It's a lot smaller as it only contains three 64 bytes sub-contexts; the info, endpoint-out, and endpoint-in contexts. In total 192 bytes. The context size (CSZ) field in HCCPARAMS1 xhci register does not alter DbC context size like it does for xhci device contexts. So don't use the geneic xhci context memory allocation, or the dma pool that is intended for xhci device contexts. In addition to saving memory this also helps decoupleing xhci and dbc code. Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Link: https://lore.kernel.org/r/20200723144530.9992-19-mathias.nyman@linux.intel.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.
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.