OMAP_I2C_STAT_XUDF
if (stat & OMAP_I2C_STAT_XUDF) {
err |= OMAP_I2C_STAT_XUDF;
omap_i2c_ack_stat(omap, OMAP_I2C_STAT_XUDF);
if (omap->cmd_err & (OMAP_I2C_STAT_ROVR | OMAP_I2C_STAT_XUDF)) {
if (stat & OMAP_I2C_STAT_XUDF)