Only tty_ldisc_ops::read() and ::write() of n_null behave differently than
the default ldops implementations. They return %EOPNOTSUPP instead of
%EIO. So keep only those two and remove the rest ldops as they are
superfluous.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
---
drivers/tty/n_null.c | 18 ------------------
1 file changed, 18 deletions(-)
diff --git a/drivers/tty/n_null.c b/drivers/tty/n_null.c
index f913b665af72..4a0d8bb2fb4c 100644
--- a/drivers/tty/n_null.c
+++ b/drivers/tty/n_null.c
@@ -10,15 +10,6 @@
* Copyright (C) Intel 2017
*/
-static int n_null_open(struct tty_struct *tty)
-{
- return 0;
-}
-
-static void n_null_close(struct tty_struct *tty)
-{
-}
-
static ssize_t n_null_read(struct tty_struct *tty, struct file *file,
unsigned char *buf, size_t nr,
void **cookie, unsigned long offset)
@@ -32,21 +23,12 @@ static ssize_t n_null_write(struct tty_struct *tty, struct file *file,
return -EOPNOTSUPP;
}
-static void n_null_receivebuf(struct tty_struct *tty,
- const unsigned char *cp, const char *fp,
- int cnt)
-{
-}
-
static struct tty_ldisc_ops null_ldisc = {
.owner = THIS_MODULE,
.num = N_NULL,
.name = "n_null",
- .open = n_null_open,
- .close = n_null_close,
.read = n_null_read,
.write = n_null_write,
- .receive_buf = n_null_receivebuf
};
static int __init n_null_init(void)
--
2.41.0
