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[ Upstream commit 24fdd5074b205cfb0ef4cd0751a2d03031455929 ] In case of error, of_parse_phandle_with_args() returns -EINVAL when the passed index is negative, or -ENOENT when the index is for an empty phandle. The mailbox core overwrote the error return code with a less precise -ENODEV. Use the error returned code from of_parse_phandle_with_args(). Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com> 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.