[PATCH v2] iommu/io-pgtable-arm: Add quirk to quiet WARN_ON()

[Jason Gunthorpe]

On Wed, May 07, 2025 at 07:29:51AM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark at chromium.org>
> 
> In situations where mapping/unmapping sequence can be controlled by
> userspace, attempting to map over a region that has not yet been
> unmapped is an error.  But not something that should spam dmesg.
> 
> Now that there is a quirk, we can also drop the selftest_running
> flag, and use the quirk instead for selftests.
> 
> Signed-off-by: Rob Clark <robdclark at chromium.org>
> ---
> Sending v2 stand-alone, since I'm not quite ready to send a new
> iteration of the full VM_BIND series.  And with selftest_running
> removed, I think this patch stands on it's own.  (And maybe there
> is still time to sneak this in for v6.16, removing an iommu dep
> for the VM_BIND series in v6.17?)

You should just remove the warn on completely, no other driver does this.

Jason