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1b69a6a2e8
To fix issue like this: dma-pl330 ff6d0000.dma-controller: pl330_update:1733 Unexpected! dma-pl330 ff6d0000.dma-controller: DMAC halted! The root cause is DMA clk is closed when DMA interrupt is in service. This may happen, as follow: 1. When pl330_terminate_all is called, and set pch->active false, power_down is true, call pm_runtime_put_autosuspend. 2. Then pl330_tasklet is called, if power_down is also true, call pm_runtime_put_autosuspend again. 3. DMA is opened again, because the autosuspend is asyn, it may close the DMA clk. If DMA interrupt is coming, it causes the issue. Change-Id: Ib1feb508c16afb4bc9ced0c3660f2b6b4a19c068 Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.