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Starting with version 4.2.a, the AXI DMAC controller can report partial transfers that have been issued. This change implements computing DMA residue information for transfers, based on that reported information. The way this is done, is to dequeue the partial transfers from the FIFO of partial transfers, store the partial length to the correct segment & descriptor, and compute the residue before submitting the DMA cookie to the DMA framework. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.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.