WDC_XSURF_CHANNELS
sc->sc_wdcdev.sc_atac.atac_nchannels = WDC_XSURF_CHANNELS;
for (i = 0; i < WDC_XSURF_CHANNELS; i++) {
struct ata_channel *sc_chanarray[WDC_XSURF_CHANNELS];
struct wdc_xsurf_port sc_ports[WDC_XSURF_CHANNELS];