ahci_nr_ports
n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
if (map_ports > ahci_nr_ports(cap)) {
port_map, ahci_nr_ports(cap));
port_map = (1 << ahci_nr_ports(cap)) - 1;
n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));