Re: [PATCH v1 16/16] nvme-pci: unmap MMIO pages with appropriate interface
From: Jason Gunthorpe <jgg@nvidia.com>
Date: 2025-08-07 13:45:38
Also in:
linux-block, linux-doc, linux-iommu, linux-mm, linux-nvme, linuxppc-dev, lkml, rust-for-linux, virtualization, xen-devel
On Mon, Aug 04, 2025 at 03:42:50PM +0300, Leon Romanovsky wrote:
From: Leon Romanovsky <leonro@nvidia.com> Block layer maps MMIO memory through dma_map_phys() interface with help of DMA_ATTR_MMIO attribute. There is a need to unmap that memory with the appropriate unmap function.
Be specific, AFIACT the issue is that on dma_ops platforms the map will call ops->map_resource for ATTR_MMIO so we must have the unmap call ops->unmap_resournce Maybe these patches should be swapped then, as adding ATTR_MMIO seems like it created this issue? Jason