[PATCH] USB Serial: clean tty fields on failed device open

If either the driver's open() method or try_module_get() fails, we need to
set 'tty->driver_data' and 'port->tty' to NULL in serial_open(), otherwise
we'll get an OOPS in usb_device_disconnect() when the device is disconnected.

Signed-off-by: Frank Gevaerts <frank.gevaerts@fks.be>
Acked-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index cbca3402d6cd..92c213fa9317 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -237,6 +237,8 @@ bailout_module_put:
         module_put(serial->type->driver.owner);
 bailout_mutex_unlock:
         port->open_count = 0;
+        tty->driver_data = NULL;
+        port->tty = NULL;
         mutex_unlock(&port->mutex);
 bailout_kref_put:
         usb_serial_put(serial);