Messages in this thread | | | Subject | Re: [PATCH v4 03/13] PCI: pci_stub: Suppress kernel DMA ownership auto-claiming | From | Lu Baolu <> | Date | Tue, 4 Jan 2022 09:54:31 +0800 |
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On 1/4/22 3:53 AM, Jason Gunthorpe wrote: > On Fri, Dec 31, 2021 at 09:10:43AM +0800, Lu Baolu wrote: > >> We still need to call iommu_device_use_dma_api() in bus dma_configure() >> callback. But we can call iommu_device_unuse_dma_api() in the .probe() >> of vfio (and vfio-approved) drivers, so that we don't need the new flag >> anymore. > > No, we can't. The action that iommu_device_use_dma_api() takes is to > not call probe, it obviously cannot be undone by code inside probe.
Yes. Agreed.
> Jason >
Best regards, baolu
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