[PATCH v1 16/16] nvme-pci: unmap MMIO pages with appropriate interface

[Leon Romanovsky]

On Thu, Aug 07, 2025 at 10:45:33AM -0300, Jason Gunthorpe wrote:
> On Mon, Aug 04, 2025 at 03:42:50PM +0300, Leon Romanovsky wrote:
> > From: Leon Romanovsky <leonro at 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?

The best variant will be to squash previous patch "block-dma: properly
take MMIO path", but I don't want to mix them as they for different
kernel areas.

Thanks

> 
> Jason
>