usb: io_ti: Make edge_remove_sysfs_attrs the port_remove method.

Calling edge_remove_sysfs_attrs from edge_disconnect is too late
as the device has already been removed from sysfs.

Do the simple and obvious thing and make edge_remove_sysfs_attrs
the port_remove method.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Reported-by: Wolfgang Frisch <wfpub@roembden.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/io_ti.c

@@ -2657,15 +2657,7 @@ static int edge_startup(struct usb_serial *serial)
 
 static void edge_disconnect(struct usb_serial *serial)
 {
-	int i;
-	struct edgeport_port *edge_port;
-
 	dbg("%s", __func__);
-
-	for (i = 0; i < serial->num_ports; ++i) {
-		edge_port = usb_get_serial_port_data(serial->port[i]);
-		edge_remove_sysfs_attrs(edge_port->port);
-	}
 }
 
 static void edge_release(struct usb_serial *serial)
@@ -2744,6 +2736,7 @@ static struct usb_serial_driver edgeport_1port_device = {
 	.disconnect		= edge_disconnect,
 	.release		= edge_release,
 	.port_probe		= edge_create_sysfs_attrs,
+	.port_remove		= edge_remove_sysfs_attrs,
 	.ioctl			= edge_ioctl,
 	.set_termios		= edge_set_termios,
 	.tiocmget		= edge_tiocmget,
@@ -2775,6 +2768,7 @@ static struct usb_serial_driver edgeport_2port_device = {
 	.disconnect		= edge_disconnect,
 	.release		= edge_release,
 	.port_probe		= edge_create_sysfs_attrs,
+	.port_remove		= edge_remove_sysfs_attrs,
 	.ioctl			= edge_ioctl,
 	.set_termios		= edge_set_termios,
 	.tiocmget		= edge_tiocmget,