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578464679fMerge series from Tobias Schramm <t.schramm@manjaro.org>: This set of patches fixes two bugs in the sun6i SPI driver that result in corruption of received data in DMA RX mode. The first bug seems to be related to an incompatibility of the SPI RX FIFO with wider than single byte read accesses during SPI transfers. I'm not sure if this bug affects all types of SPI controllers found in Allwinner SoCs supported by this driver. However reducing the access width should always be safe. I've tested this change on a V3s SoC. Further testing to narrow down the set of affected SoCs in the future would be welcome. The second bug is a race between SPI RX DMA and FIFO drain logic for interrupt-based SPI operation. This bug affects all SPI controllers supported by this driver. Once again this change has been tested on the Allwinner V3s SoC. |
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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.