f52b03c707
Current s3c64xx SPI driver acquires DMA channel during driver probe and holds on it even when channels are not used (no DMA transfer). This is a problem especially when all the DMA channels are exhausted (as other IPs on the same DMA controller also acquires DMA channel) and if a new IP/Device requests for a DMA channel (on the same DMA controller), it won’t get DMA channel allocated. The said issue can be avoided if s3c64xx driver request and release DMA channel before and after data transfer. Let’s modify the driver to request and release DMA channel before and after DMA mode data transfer. Signed-off-by: Adithya K V <adithya.kv@samsung.com> Link: https://lore.kernel.org/r/20220524140132.59300-1-adithya.kv@samsung.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.