libqos/ahci: set the NCQ tag on command_commit
NCQ commands have the concept of a "TAG" that they need to set, but in the AHCI world, it is mandated that the TAG always match the command slot that you executed the NCQ from. See AHCI 9.3.1.1.5.2 "Native Queued Commands". Signed-off-by: NJohn Snow <jsnow@redhat.com> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Message-id: 1435016308-6150-14-git-send-email-jsnow@redhat.com
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