[PATCH v2 05/14] iommufd: Return EOPNOTSUPP for failures due to driver bugs

[Tian, Kevin]

> From: Nicolin Chen <nicolinc at nvidia.com>
> Sent: Saturday, June 14, 2025 2:35 PM
> 
> It's more accurate to report EOPNOTSUPP when an ioctl failed due to driver
> bug, since there is nothing wrong with the user space side.
> 
> Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>

Reviewed-by: Kevin Tian <kevin.tian at intel.com>