taglinefilesource code
pi_open150drivers/net/pi2.cstatic int pi_open(struct device *dev);
pi_open1414drivers/net/pi2.cdev->open = pi_open;
pi_open1623drivers/net/pi2.cpi_open(&pi0a); /* both channels get reset %%% */
pi_open1643drivers/net/pi2.cpi_open(dev);