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Set the maximum segment size, since the hardware can do transfers larger than the default 64 KiB returned by dma_get_max_seg_size(). The maximum segment size is limited by the 24-bit transfer count field in DMA descriptors. The number of bytes is equal to the transfer count times the transfer size unit, which is selected by the driver based on the DMA buffer address and length of the transfer. The size unit can be as small as 1 byte, so set the maximum segment size to 2^24-1 bytes to ensure the transfer count will not overflow regardless of the size unit selected by the driver. Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com> Link: https://lore.kernel.org/r/20220411153618.49876-1-aidanmacdonald.0x0@gmail.com Signed-off-by: Vinod Koul <vkoul@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.