0a6ab90c0a
Use IS_ERR() instead of IS_ERR_OR_NULL() because devm_of_phy_get_by_index() never return NULL value; But still need ignore the error of -ENODEV, for more information, please refer to: [0] https://lkml.org/lkml/2018/4/19/88 [1] https://patchwork.kernel.org/patch/10160181/ Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Reviewed-by: Johan Hovold <johan@kernel.org> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.