s390/tty3270: ignore NUL characters

With 'TERM=vt220' zsh is sending several NUL characters with
the prompt to the tty. Both xterm and the linux drm console
seem to ignore them. Ignore them in tty3270 as well.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index 9c816d1..7ff116c 100644 (file)
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -1732,6 +1732,8 @@ static void tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty,
                }
 
                switch (buf[i_msg]) {
+               case 0x00:
+                       break;
                case 0x07:              /* '\a' -- Alarm */
                        tp->wcc |= TW_PLUSALARM;
                        break;