Linux Device Drivers Development

The remove() function

The remove function must release every resource grabbed in the probe function. Its structure is as follows:

static int  my_remove(struct spi_device *spi); 

A typical remove function may look like the following:

static int mc33880_remove(struct spi_device *spi) 
{ 
    struct mc33880 *mc; 
    mc = spi_get_drvdata(spi); /* Get our data back */ 
    if (!mc) 
        return -ENODEV; 
 
    /* 
     * unregister from frameworks with which we registered in the 
     * probe function 
     */ 
    [...] 
    mutex_destroy(&mc->lock); 
    return 0; 
}