Messages in this thread | | | From | Arvind Sankar <> | Date | Mon, 7 Oct 2019 13:58:57 -0400 | Subject | Re: ehci-pci breakage with dma-mapping changes in 5.4-rc2 |
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On Mon, Oct 07, 2019 at 10:56:30AM -0700, Christoph Hellwig wrote: > On Mon, Oct 07, 2019 at 07:55:28PM +0200, Christoph Hellwig wrote: > > 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. > > Actually my patch already calls dma_direct_get_required_mask. > How did you get the loop?
The function iommu_need_mapping (not changed by your patch) calls dma_get_required_mask internally, to check whether the device's dma_mask is big enough or not. That's the call I was asking whether it needs to be changed.
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