Re: [PATCH 02/11] driver core: Set DMA ownership during driver bind/unbind

On Mon, Nov 15, 2021 at 07:59:10AM +0100, Greg Kroah-Hartman wrote:

This feels wrong to be doing it in the driver core, why doesn't the bus
that cares about this handle it instead?

You just caused all drivers in the kernel today to set and release this
ownership, as none set this flag.  Shouldn't it be the other way around?

And again, why not in the bus that cares?

You only have problems with 1 driver out of thousands, this feels wrong
to abuse the driver core this way for just that one.

This isn't really a bus thingy, but related to the IOMMU subsystem.
That being said as pointed out in my previous reply I'd expect this
to go along with other IOMMU setup.