usb-serial: don't release unregistered minors

[linux-2.6-omap-h63xx.git] / drivers / usb / serial / usb-serial.c

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 8c2d531eedea1f3bf2759ec9796dcf96cb8dcfff..b157c48e8b78df594bd0386f5ff38a725cf18929 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -122,9 +122,6 @@ static void return_serial(struct usb_serial *serial)
 
        dbg("%s", __func__);
 
-       if (serial == NULL)
-               return;
-
        for (i = 0; i < serial->num_ports; ++i)
                serial_table[serial->minor + i] = NULL;
 }
@@ -142,7 +139,8 @@ static void destroy_serial(struct kref *kref)
        serial->type->shutdown(serial);
 
        /* return the minor range that this device had */
-       return_serial(serial);
+       if (serial->minor != SERIAL_TTY_NO_MINOR)
+               return_serial(serial);
 
        for (i = 0; i < serial->num_ports; ++i)
                serial->port[i]->port.count = 0;
@@ -575,6 +573,7 @@ static struct usb_serial *create_serial(struct usb_device *dev,
        serial->interface = interface;
        kref_init(&serial->kref);
        mutex_init(&serial->disc_mutex);
+       serial->minor = SERIAL_TTY_NO_MINOR;
 
        return serial;
 }