Hi!
Goal, when the user do :
# head -1 /dev/miscdrv
The driver prints: Hello World!
Steps:
# Make
# insmod misc.ko
# head -1 /dev/miscdrv
Why my driver doesn't work ?
What is worg with my read operation?
static ssize_t
misc_drv_read(struct file *filp, char __user * buf, size_t count, loff_t * offp){
int nbytes;
char * string = "hello World";
nbytes = copy_to_user(buf, string, 12);
return nbytes;
}