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The FIS Receive Buffer and Command List Buffer pointers should not be edited while the FIS receive engine or Command Receive engines are running. Currently, we attempt to re-map the buffers every time they are adjusted, but while the AHCI engines are off, these registers may contain stale values, so we should not attempt to re-map these values until the engines are reactivated. Reported-by: Jordan Hargrave <jharg93@gmail.com> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1426283454-15590-2-git-send-email-jsnow@redhat.com