void scullp_cleanup(void)
{
int i;
unregister_chrdev(scullp_major, "scullp");
#ifdef SCULLP_USE_PROC
remove_proc_entry("scullpmem", 0);
#endif
for (i=0; i<scullp_devs; i++)
scullp_trim(scullp_devices+i);
kfree(scullp_devices);
}
void scullp_cleanup(void)
{
int i;
#ifdef SCULLP_USE_PROC
remove_proc_entry("scullpmem", NULL);
#endif
for (i = 0; i < scullp_devs; i++) {
cdev_del(&scullp_devices[i].cdev);
scullp_trim(scullp_devices + i);
}
kfree(scullp_devices);
unregister_chrdev_region(MKDEV (scullp_major, 0), scullp_devs);
}
int scullp_open (struct inode *inode, struct file *filp)
{
struct scullp_dev *dev; /* device information */
/* Find the device */
dev = container_of(inode->i_cdev, struct scullp_dev, cdev);
/* now trim to 0 the length of the device if open was write-only */
if ( (filp->f_flags & O_ACCMODE) == O_WRONLY) {
if (down_interruptible (&dev->sem))
return -ERESTARTSYS;
scullp_trim(dev); /* ignore errors */
up (&dev->sem);
}
/* and use filp->private_data to point to the device data */
filp->private_data = dev;
return 0; /* success */
}
int scullp_open (struct inode *inode, struct file *filp)
{
int num = MINOR(inode->i_rdev);
ScullP_Dev *dev; /* device information */
/* check the device number */
if (num >= scullp_devs) return -ENODEV;
dev = &scullp_devices[num];
/* now trim to 0 the length of the device if open was write-only */
if ( (filp->f_flags & O_ACCMODE) == O_WRONLY) {
if (down_interruptible (&dev->sem))
return -ERESTARTSYS;
scullp_trim(dev); /* ignore errors */
up (&dev->sem);
}
/* and use filp->private_data to point to the device data */
filp->private_data = dev;
MOD_INC_USE_COUNT;
return 0; /* success */
}