TTY: call tty_port_destroy in the rest of drivers

After commit "TTY: move tty buffers to tty_port", the tty buffers are
not freed in some drivers. This is because tty_port_destructor is not
called whenever a tty_port is freed. This was an assumption I counted
with but was unfortunately untrue. So fix the drivers to fulfil this
assumption.

To be sure, the TTY buffers (and later some stuff) are gone along with
the tty_port, we have to call tty_port_destroy at tear-down places.
This is mostly where the structure containing a tty_port is freed.
This patch does exactly that -- put tty_port_destroy at those places.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 7 insertions, 2 deletions

diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 21721d2..b66eaa0 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -549,8 +549,10 @@ static int mgslpc_probe(struct pcmcia_device *link)
     /* Initialize the struct pcmcia_device structure */
 
     ret = mgslpc_config(link);
-    if (ret)
+    if (ret) {
+	    tty_port_destroy(&info->port);
 	    return ret;
+    }
 
     mgslpc_add_device(info);
 
@@ -2757,6 +2759,7 @@ static void mgslpc_remove_device(MGSLPC_INFO *remove_info)
 			hdlcdev_exit(info);
 #endif
 			release_resources(info);
+			tty_port_destroy(&info->port);
 			kfree(info);
 			mgslpc_device_count--;
 			return;
diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c
index af98f6d..4945bd3 100644
--- a/drivers/char/ttyprintk.c
+++ b/drivers/char/ttyprintk.c
@@ -179,7 +179,6 @@ static int __init ttyprintk_init(void)
 {
 	int ret = -ENOMEM;
 
-	tty_port_init(&tpk_port.port);
 	tpk_port.port.ops = &null_ops;
 	mutex_init(&tpk_port.port_write_mutex);
 
@@ -190,6 +189,8 @@ static int __init ttyprintk_init(void)
 	if (IS_ERR(ttyprintk_driver))
 		return PTR_ERR(ttyprintk_driver);
 
+	tty_port_init(&tpk_port.port);
+
 	ttyprintk_driver->driver_name = "ttyprintk";
 	ttyprintk_driver->name = "ttyprintk";
 	ttyprintk_driver->major = TTYAUX_MAJOR;
@@ -211,6 +212,7 @@ static int __init ttyprintk_init(void)
 error:
 	tty_unregister_driver(ttyprintk_driver);
 	put_tty_driver(ttyprintk_driver);
+	tty_port_destroy(&tpk_port.port);
 	ttyprintk_driver = NULL;
 	return ret;
 }