ATA_PFLAG_INITIALIZING
ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
ap->pflags &= ~ATA_PFLAG_INITIALIZING;
WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING));
if (ap->pflags & ATA_PFLAG_INITIALIZING)