USB: serial: fix interface data use

The interface data should not be used as a flag to signal disconnect.

Now that all serial drivers use the usb_serial disconnect flag and
mutex, we can set the interface data prior to registering the ports and
there's no need to clear it at disconnect.

This should hopefully also make it more clear that the interface data is
not a flag, which could prevent future misuse.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 97355a15bbea8b5a36f3c7e52fd0eb5d4c3caa8a..906f06e97fdefed4d1044735130c7bb034ac17e0 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1043,6 +1043,8 @@ int usb_serial_probe(struct usb_interface *interface,
                dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined");
        }
 
+       usb_set_intfdata(interface, serial);
+
        /* if this device type has an attach function, call it */
        if (type->attach) {
                retval = type->attach(serial);
@@ -1087,10 +1089,7 @@ int usb_serial_probe(struct usb_interface *interface,
        serial->disconnected = 0;
 
        usb_serial_console_init(debug, minor);
-
 exit:
-       /* success */
-       usb_set_intfdata(interface, serial);
        module_put(type->driver.owner);
        return 0;
 
@@ -1112,7 +1111,6 @@ void usb_serial_disconnect(struct usb_interface *interface)
        dbg("%s", __func__);
 
        mutex_lock(&serial->disc_mutex);
-       usb_set_intfdata(interface, NULL);
        /* must set a flag, to signal subdrivers */
        serial->disconnected = 1;
        mutex_unlock(&serial->disc_mutex);