static int riowd_open(struct inode *inode, struct file *filp)
{
- nonseekable_open(inode, filp);
return 0;
}
static ssize_t riowd_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
{
+ if (ppos != &file->f_pos)
+ return -ESPIPE;
+
if (count) {
riowd_pingtimer();
return 1;