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https://bugzilla.redhat.com/show_bug.cgi?id=1141732 Introduced by commit id '8f76ad99' the logic to detach a scsi_host device (SCSI or iSCSI) fails when attempting to remove the 'drive' because as I found in my investigation - the DelDevice takes care of that for us. The investigation turned up commits to adjust the logic for the qemuMonitorDelDevice and qemuMonitorDriveDel processing for interfaces (commit id '81f76598'), disk bus=VIRTIO,SCSI,USB (commit id '0635785b'), and chr devices (commit id '55b21f9b'), but nothing with the host devices. This commit uses the model for the previous set of changes and applies it to the hostdev path. The call to qemuDomainDetachHostSCSIDevice will return to qemuDomainDetachThisHostDevice handling either the audit of the failure or the wait for the removal and then call into qemuDomainRemoveHostDevice for the event, removal from the domain hostdev list, and audit of the removal similar to other paths. NOTE: For now the 'conn' param to +qemuDomainDetachHostSCSIDevice is left as ATTRIBUTE_UNUSED. Removing requires a cascade of other changes to be left for a future patch.