WBCIR_REG_SP3_LSR
while (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_AVAIL) {
if (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_OVERRUN) {
inb(data->sbase + WBCIR_REG_SP3_LSR); /* Clear LSR */