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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>
This commit is contained in:
Tilman Schmidt 2008-11-29 21:38:04 -08:00 committed by David S. Miller
parent c5419e6f05
commit af4218c3a6
1 changed files with 0 additions and 15 deletions
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15
drivers/isdn/gigaset/ser-gigaset.c
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@ -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)
@ -672,18 +670,6 @@ gigaset_tty_ioctl(struct tty_struct *tty, struct file *file,
return rc;
}
/*
* 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
@ -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,
};