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[ Upstream commit 5f1a453974204175f20b3788824a0fe23cc36f79 ] The DECON channels are not cleared properly as the windows aren't shadow protected. When accompanied with an IOMMU, it pagefaults, and the kernel panics. Implement shadow protect/unprotect, along with a standalone update, for channel clearing to properly take effect. Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org> Signed-off-by: Inki Dae <inki.dae@samsung.com> Stable-dep-of: e1361a4f1be9 ("drm/exynos: exynos7_drm_decon: remove ctx->suspended") Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.