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0395be967b
buswidth and dtr fields in spi_mem_op are only valid when the corresponding spi_mem_op phase has a non-zero length. For example, SPI NAND core doesn't set buswidth when using SPI_MEM_OP_NO_ADDR phase. Fix the dtr checks in set_protocol() and suppports_mem_op() to ignore empty spi_mem_op phases, as checking for dtr field in empty phase will result in false negatives. Signed-off-by: Apurva Nandan <a-nandan@ti.com> Link: https://lore.kernel.org/r/20210716232504.182-3-a-nandan@ti.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.