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ed9580beefd9f54eab66f070d39fc22cb9c65743
If dmatx no stop, but buffer release will iommu write failed. Waiting for dmatx stopped when hdr read back by user mode. Change-Id: I8f9eaa386e0bcd1f01e2bf7457fe1b3b22041bbc Signed-off-by: Cai YiWei <cyw@rock-chips.com>
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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.
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.
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