[PATCH] iommu/rockchip: Add missing set_platform_dma_ops callback

[Jason Gunthorpe]

On Wed, Mar 15, 2023 at 04:41:52PM +0000, Steven Price wrote:
> Similar to exynos, we need a set_platform_dma_ops() callback for proper
> operation on ARM 32 bit after recent changes in the IOMMU framework
> (detach ops removal).
> 
> Fixes: c1fe9119ee70 ("iommu: Add set_platform_dma_ops callbacks")
> Signed-off-by: Steven Price <steven.price at arm.com>
> ---
> This fixes a splat I was seeing on a Firefly-RK3288, more details here:
> https://lore.kernel.org/all/26a5d1b8-40b3-b1e4-bc85-740409c26838@arm.com/

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Do you know what state the iommu is left in after
rk_iommu_detach_device()? Ie is it blocking DMA or doing identity or
something else?

Jason