gigaset: remove unnecessary poll method

The N_GIGASET_M101 line discipline implemented by the ser_gigaset
driver does not transfer any data from/to userspace through the
tty interface. Therefore a poll method is not needed.

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

1 files changed, 0 insertions, 15 deletions

diff --git a/drivers/isdn/gigaset/ser-gigaset.c b/drivers/isdn/gigaset/ser-gigaset.c
index 07052ed2a0c5..0b8c8f2b433f 100644
--- a/drivers/isdn/gigaset/ser-gigaset.c
+++ b/drivers/isdn/gigaset/ser-gigaset.c
@@ -16,7 +16,6 @@
 #include <linux/moduleparam.h>
 #include <linux/platform_device.h>
 #include <linux/tty.h>
-#include <linux/poll.h>
 #include <linux/completion.h>
 
 /* Version Information */
@@ -571,7 +570,6 @@ gigaset_tty_close(struct tty_struct *tty)
         }
 
         /* prevent other callers from entering ldisc methods */
-        /* FIXME: should use the tty state flags */
         tty->disc_data = NULL;
 
         if (!cs->hw.ser)
@@ -673,18 +671,6 @@ gigaset_tty_ioctl(struct tty_struct *tty, struct file *file,
 }
 
 /*
- * Poll on the tty.
- * Unused, always return zero.
- *
- * FIXME: should probably return an exception - especially on hangup
- */
-static unsigned int
-gigaset_tty_poll(struct tty_struct *tty, struct file *file, poll_table *wait)
-{
-        return 0;
-}
-
-/*
  * Called by the tty driver when a block of data has been received.
  * Will not be re-entered while running but other ldisc functions
  * may be called in parallel.
@@ -773,7 +759,6 @@ static struct tty_ldisc_ops gigaset_ldisc = {
         .read           = gigaset_tty_read,
         .write          = gigaset_tty_write,
         .ioctl          = gigaset_tty_ioctl,
-        .poll           = gigaset_tty_poll,
         .receive_buf    = gigaset_tty_receive,
         .write_wakeup   = gigaset_tty_wakeup,
 };