Re: [PATCH URGENT] arm: dma-mapping: Set DMA IOMMU ops in arm_iommu_attach_device()

["Heiko Stübner" <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>]

Am Freitag, 23. Januar 2015, 16:21:49 schrieb Laurent Pinchart:
> Commit 4bb25789ed28228a ("arm: dma-mapping: plumb our iommu mapping ops
> into arch_setup_dma_ops") moved the setting of the DMA operations from
> arm_iommu_attach_device() to arch_setup_dma_ops() where the DMA
> operations to be used are selected based on whether the device is
> connected to an IOMMU. However, the IOMMU detection scheme requires the
> IOMMU driver to be ported to the new IOMMU of_xlate API. As no driver
> has been ported yet, this effectively breaks all IOMMU ARM users that
> depend on the IOMMU being handled transparently by the DMA mapping API.
> 
> Fix this by restoring the setting of DMA IOMMU ops in
> arm_iommu_attach_device() and splitting the rest of the function into a
> new internal __arm_iommu_attach_device() function, called by
> arch_setup_dma_ops().
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>

on a rk3288 board with the currently failing drm driver this patch brought it 
back to display something :-) , so

Tested-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>


Thanks
Heiko