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
