[PATCH v5 09/29] iommufd: Do not unmap an owned iopt_area
Nicolin Chen
nicolinc at nvidia.com
Wed May 28 11:07:43 PDT 2025
On Wed, May 28, 2025 at 02:08:45PM -0300, Jason Gunthorpe wrote:
> Fundamentally this is supporting accesses that don't have an unmap op
> callback.
Ah, I see.
> It could be done differently, with the below just create your access
> with a null ops. Prevent mdev drivers from doing this when they create
> their accesses. We don't need to optimize this failure case so it is
> fine to scan the xarray. All we really need to do here is eliminate
> the WARN_ON.
Yes. That approach looks much cleaner.
Will replace the iopt_pin_pages patch.
Thanks
Nicolin
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