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intpm: change translation of HBA error status to smbus(4) errors

Description

intpm: change translation of HBA error status to smbus(4) errors

PIIX4_SMBHSTSTAT_ERR can be set for several reasons that, unfortunately,
cannot be distinguished, but the most typical case is a missing or hung
slave (SMB_ENOACK).

PIIX4_SMBHSTSTAT_FAIL means failed or killed / aborted transaction, so
it's previous mapping to SMB_ENOACK was not ideal.

After this change an smb(4) access to a missing slave results in ENXIO
rather than EIO. To me, that seems to be more appropriate.

MFC after: 3 weeks

Details

Provenance
avgAuthored on
Parents
rS345410: ZFS vdev_file: use correct value for waitfor parameter of VOP_FSYNC
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