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In the config_ep_by_speed_and_alt function, select the corresponding descriptor through g->speed. But some legacy or not well designed function drivers may not support the corresponding speed. So, we can directly display warnings instead of causing kernel panic. At the same time, it indicates the reasons in warning message. Reviewed-by: Peter Chen <peter.chen@kernel.org> Signed-off-by: Qihang Hu <huqihang@oppo.com> Link: https://lore.kernel.org/r/20211110101129.462357-1-huqihang@oppo.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.