Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux
029bf5a02b
This is a temporary workround for the case when: -SWIOTLB is used for DMA bounce buffering AND -data to be DMA-ed is mapped DMA_FROM_DEVICE and device only partially overwrites the "original" data AND -it's expected that the "original" data that was not overwritten by the device to be untouched As discussed in upstream, the proper fix should be: -either an extension of the DMA API OR -a workaround in the device driver (considering these cases are rarely met in practice) Since both alternatives are not trivial (to say the least), add a workaround for the few cases matching the error conditions listed above. Link: https://lore.kernel.org/lkml/VI1PR0402MB348537CB86926B3E6D1DBE0A98070@VI1PR0402MB3485.eurprd04.prod.outlook.com/ Link: https://lore.kernel.org/lkml/20190522072018.10660-1-horia.geanta@nxp.com/ Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Reviewed-by: Valentin Ciocoi Radulescu <valentin.ciocoi@nxp.com> Reviewed-by: Iuliana Prodan <iuliana.prodan@nxp.com> |
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| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
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.