[PATCH v2] of/device: Update dma_range_map only when dev has valid dma-ranges

[Rob Herring]

On Tue, 19 Jan 2021 18:52:03 +0800, Yong Wu wrote:
> The commit e0d072782c73 ("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: Rob Herring <robh+dt at kernel.org>
> CC: Frank Rowand <frowand.list at gmail.com>
> Fixes: e0d072782c73 ("dma-mapping: introduce DMA range map, supplanting dma_pfn_offset"),
> Suggested-by: Robin Murphy <robin.murphy at arm.com>
> Signed-off-by: Yong Wu <yong.wu at mediatek.com>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
> Reviewed-by: Rob Herring <robh at kernel.org>
> ---
>  drivers/of/device.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 

Applied, thanks!