Re: [PATCH v6 01/11] iommu: Add dma ownership management interfaces

Lu Baolu
2022-02-24T05:18:31Z

Hi Robin and Jason,

On 2/24/22 2:02 AM, Jason Gunthorpe 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.

So we don't need the owner pointer in the API anymore, right? As we will
only allow the claiming interface to be called only once, this token is
unnecessary.

Best regards,
baolu