tty: Fix regressions in the char driver conversion

This forgot to update a field in the old char drivers. The fact nobody
has basically noticed (except one mxser user) rather suggests most of these
drivers could go into the bitbucket.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Andreas Pretzsch <apr@cn-eng.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index 0fa2e4a0835d..c1ab303455cf 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -879,8 +879,8 @@ static int isicom_open(struct tty_struct *tty, struct file *filp)
         if (tport == NULL)
                 return -ENODEV;
         port = container_of(tport, struct isi_port, port);
-        card = &isi_card[BOARD(tty->index)];
 
+        tty->driver_data = port;
         return tty_port_open(tport, tty, filp);
 }
 
@@ -936,7 +936,12 @@ static void isicom_shutdown(struct tty_port *port)
 static void isicom_close(struct tty_struct *tty, struct file *filp)
 {
         struct isi_port *ip = tty->driver_data;
-        struct tty_port *port = &ip->port;
+        struct tty_port *port;
+
+        if (ip == NULL)
+                return;
+
+        port = &ip->port;
         if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
                 return;
         tty_port_close(port, tty, filp);