Re: [PATCH v4 0/3] driver core: add TAINT_FORCED_BIND for when userspace manually messes with devices and drivers

[Jason Gunthorpe]

On Mon, Oct 26, 2026 at 02:22:43PM +0200, Leon Romanovsky wrote:

> This is needed for two reasons: to save hardware and software resources
> when creating a large number of VFs, and to allow the PCI config space to
> be configured *before* the driver starts using it.
> 
> There is no in-kernel alternative.

Having userspace involved in driver binding has also always been the
plan for confidential computing needs. We cannot have a device driver
bound across some of the HW transitions like TDISP shared/private, so
there has always been an expectation of bind/unbind.

For this case the existing sysf drivers_probe is good enough for bind,
but we must have taint-free unbind for PCI devices too.

I think this patch should be reverted ASAP, it is a pretty major
regression for a lot of users.

Jason