340ad03188
There's no need to restore DMA context on CPU_CLUSTER_PM_ENTER_FAILED as the DMA context won't be lost on errors. Note that this does not cause invalid context restore as we already check for busy DMA with omap_dma_busy() in CPU_CLUSTER_PM_ENTER, and block any deeper idle states for the SoC by returning NOTIFY_BAD if busy. If other drivers block deeper idle states with cpu_pm, we now just do a pointless restore, but only if dma was not busy on CPU_CLUSTER_PM_ENTER. Let's update the CPU_CLUSTER_PM_ENTER_FAILED handling for correctness, and add a comment. Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Adam Ford <aford173@gmail.com> Cc: Andreas Kemnade <andreas@kemnade.info> Cc: Peter Ujfalusi <peter.ujfalusi@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com> Link: https://lore.kernel.org/r/20210518074347.16908-1-tony@atomide.com Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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| Documentation | ||
| 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.