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89c7cb1608
The commite0d072782c("dma-mapping: introduce DMA range map, supplanting dma_pfn_offset") always update dma_range_map even though it was already set, like in the sunxi_mbus driver. the issue is reported at [1]. This patch avoid this(Updating it only when dev has valid dma-ranges). Meanwhile, dma_range_map contains the devices' dma_ranges information, This patch moves dma_range_map before of_iommu_configure. The iommu driver may need to know the dma_address requirements of its iommu consumer devices. [1] https://lore.kernel.org/linux-arm-kernel/5c7946f3-b56e-da00-a750-be097c7ceb32@arm.com/ CC: Frank Rowand <frowand.list@gmail.com> Fixes:e0d072782c("dma-mapping: introduce DMA range map, supplanting dma_pfn_offset"), Suggested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20210119105203.15530-1-yong.wu@mediatek.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.