On 2022-02-23 18:02, Jason Gunthorpe via iommu wrote:
On Wed, Feb 23, 2022 at 06:00:06PM +0000, Robin Murphy wrote:
...and equivalently just set owner_cnt directly to 0 here. I don't see a
realistic use-case for any driver to claim the same group more than once,
and allowing it in the API just feels like opening up various potential
corners for things to get out of sync.
I am Ok if we toss it out to get this merged, as there is no in-kernel
user right now.
Something will have to come back for iommufd, but we can look at what
is best suited then.
If iommufd plans to be too dumb to keep track of whether it already owns
a given group or not, I can't see it dealing with attaching that group
to a single domain no more than once, either ;)
Robin.
