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>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c
index 4999b34b7a60..a1f0d174e687 100644
--- a/drivers/misc/pti.c
+++ b/drivers/misc/pti.c
@@ -882,11 +882,14 @@ err:
 static void __devexit pti_pci_remove(struct pci_dev *pdev)
 {
         struct pti_dev *drv_data = pci_get_drvdata(pdev);
+        unsigned int a;
 
         unregister_console(&pti_console);
 
-        tty_unregister_device(pti_tty_driver, 0);
-        tty_unregister_device(pti_tty_driver, 1);
+        for (a = 0; a < PTITTY_MINOR_NUM; a++) {
+                tty_unregister_device(pti_tty_driver, a);
+                tty_port_destroy(&drv_data->port[a]);
+        }
 
         iounmap(drv_data->pti_ioaddr);
         pci_set_drvdata(pdev, NULL);