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a780a89108
We get the same IOVA from DRM mm framework at different times which finally cause iommu map failed. So let's try other IOVA if iommu map failed time exceeds the limitation to map as a workaround. Change-Id: Ic539f4a64d5ed0c9d3f5ac01acf3f0922a2fdc1f Signed-off-by: Simon Xue <xxm@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.
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.