linux-kernel - Re: ehci-pci breakage with dma-mapping changes in 5.4-rc2

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Date:   Mon, 7 Oct 2019 19:55:28 +0200
From:   Christoph Hellwig <hch@....de>
To:     Arvind Sankar <nivedita@...m.mit.edu>
Cc:     Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org
Subject: Re: ehci-pci breakage with dma-mapping changes in 5.4-rc2

On Mon, Oct 07, 2019 at 01:54:32PM -0400, Arvind Sankar wrote:
> It doesn't boot with the patch. Won't it go
> 	dma_get_required_mask
> 	-> intel_get_required_mask
> 	-> iommu_need_mapping
> 	-> dma_get_required_mask
> ?
> 
> Should the call to dma_get_required_mask in iommu_need_mapping be
> replaced with dma_direct_get_required_mask on top of your patch?

Yes, sorry.