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

From: Nicolin Chen <redacted>
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 <redacted>

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

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