RE: [PATCH v4 4/6] iommu: Regulate EINVAL in ->attach_dev callback functions

[Tian, Kevin]

> From: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Sent: Wednesday, September 21, 2022 4:23 PM
> 
> Following the new rules in include/linux/iommu.h kdocs, EINVAL now can be
> used to indicate that domain and device are incompatible by a caller that
> treats it as a soft failure and tries attaching to another domain.
> 
> On the other hand, there are ->attach_dev callback functions returning it
> for obvious device-specific errors. They will result in some inefficiency
> in the caller handling routine.
> 
> Update these places to corresponding errnos following the new rules.
> 
> Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>