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The timeout value of the current dma read is unreasonable. For example, If the spi flash clock is 26Mhz, It will takes about 1.3ms to read a 4KB data in spi mode. But the actual measurement exceeds 50s when a dma read timeout is encountered. In order to be more accurately, It is necessary to use usecs_to_jiffies, After modification, the measured timeout value is about 130ms. Signed-off-by: bayi cheng <bayi.cheng@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20221114081327.25750-1-bayi.cheng@mediatek.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.