irda/irnet: use noop_llseek

There may be applications trying to seek
on the irnet character device, so we should
use noop_llseek to avoid returning an error
when the default llseek changes to no_llseek.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

net/irda/irnet/irnet_ppp.h

@@ -103,7 +103,8 @@ static const struct file_operations irnet_device_fops =
 	.poll		= dev_irnet_poll,
 	.unlocked_ioctl	= dev_irnet_ioctl,
 	.open		= dev_irnet_open,
-	.release	= dev_irnet_close
+	.release	= dev_irnet_close,
+	.llseek		= noop_llseek,
   /* Also : llseek, readdir, mmap, flush, fsync, fasync, lock, readv, writev */
 };