isdn/gigaset: drop unused ldisc methods

The line discipline read and write methods are optional so the dummy
methods in ser_gigaset are unnecessary and can be removed.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/isdn/gigaset/ser-gigaset.c b/drivers/isdn/gigaset/ser-gigaset.c
index 3ac9c4194814ce08e3a9814a49cdf211da0c1682..375be509e95f5bd302da79446cb8867f8ecb8ec7 100644 (file)
--- a/drivers/isdn/gigaset/ser-gigaset.c
+++ b/drivers/isdn/gigaset/ser-gigaset.c
@@ -606,28 +606,6 @@ static int gigaset_tty_hangup(struct tty_struct *tty)
        return 0;
 }
 
-/*
- * Read on the tty.
- * Unused, received data goes only to the Gigaset driver.
- */
-static ssize_t
-gigaset_tty_read(struct tty_struct *tty, struct file *file,
-                unsigned char __user *buf, size_t count)
-{
-       return -EAGAIN;
-}
-
-/*
- * Write on the tty.
- * Unused, transmit data comes only from the Gigaset driver.
- */
-static ssize_t
-gigaset_tty_write(struct tty_struct *tty, struct file *file,
-                 const unsigned char *buf, size_t count)
-{
-       return -EAGAIN;
-}
-
 /*
  * Ioctl on the tty.
  * Called in process context only.
@@ -761,8 +739,6 @@ static struct tty_ldisc_ops gigaset_ldisc = {
        .open           = gigaset_tty_open,
        .close          = gigaset_tty_close,
        .hangup         = gigaset_tty_hangup,
-       .read           = gigaset_tty_read,
-       .write          = gigaset_tty_write,
        .ioctl          = gigaset_tty_ioctl,
        .receive_buf    = gigaset_tty_receive,
        .write_wakeup   = gigaset_tty_wakeup,