ATA_EH_SOFTRESET
ehc->i.action &= ~ATA_EH_SOFTRESET;
ehc->i.action |= ATA_EH_SOFTRESET;
if (eh_action & (ATA_EH_SOFTRESET | ATA_EH_HARDRESET))
else if (eh_action & ATA_EH_SOFTRESET)
ehi->action |= ATA_EH_SOFTRESET;
ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,