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da748d263a
[ Upstream commitee55f75e4b] Lack the list_del in the mtk_iommu_remove, and remove bus_set_iommu(*, NULL) since there may be several iommu HWs. we can not bus_set_iommu null when one iommu driver unbind. This could be a fix for mt2712 which support 2 M4U HW and list them. Fixes:7c3a2ec028("iommu/mediatek: Merge 2 M4U HWs into one iommu domain") Signed-off-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/20220503071427.2285-6-yong.wu@mediatek.com Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.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.