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Some stm32-dma consumers [1] rather use dma_get_slave_caps() to get max_sg_burst of their DMA channel as dma_get_max_seg_size() is specific to the DMA controller. All stm32-dma channels have the same features so, don't need to implement device_caps ops. Let dma_get_slave_caps() relies on dma_device configuration. That's why this patch sets dma_device max_sg_burst to the maximum segment size, which is the maximum of data items that can be transferred without software intervention. [1] https://lore.kernel.org/lkml/20220110103739.118426-1-alain.volmat@foss.st.com/ "media: stm32: dcmi: create a dma scatterlist based on DMA max_sg_burst value" Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Tested-by: Alain Volmat <alain.volmat@foss.st.com> Link: https://lore.kernel.org/r/20220117091740.11064-1-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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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.