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578465ea2b4b56368ddc3dcefb1f6d607382ef86
The spi_transfer *t will be used in one transfer whatever. If t is NULL, there has no need to try sending data, so add an error return here. Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> Acked-by: Fugang Duan <Fugang.duan@nxp.com> Signed-off-by: Mark Brown <broonie@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.
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