USB: serial: clean up probe error paths

Clean up the probe error paths by adding a couple of new error labels.

Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 4a037b4a79cf3168cb45d60d1b6488ac21681570..c20d90ed1ef21ba33e2f56612b526fbb33fc7c7b 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -752,8 +752,8 @@ static int usb_serial_probe(struct usb_interface *interface,
 
        serial = create_serial(dev, interface, type);
        if (!serial) {
-               module_put(type->driver.owner);
-               return -ENOMEM;
+               retval = -ENOMEM;
+               goto err_put_module;
        }
 
        /* if this device type has a probe function, call it */
@@ -765,9 +765,7 @@ static int usb_serial_probe(struct usb_interface *interface,
 
                if (retval) {
                        dev_dbg(ddev, "sub driver rejected device\n");
-                       usb_serial_put(serial);
-                       module_put(type->driver.owner);
-                       return retval;
+                       goto err_put_serial;
                }
        }
 
@@ -849,9 +847,8 @@ static int usb_serial_probe(struct usb_interface *interface,
                 */
                if (num_bulk_in == 0 || num_bulk_out == 0) {
                        dev_info(ddev, "PL-2303 hack: descriptors matched but endpoints did not\n");
-                       usb_serial_put(serial);
-                       module_put(type->driver.owner);
-                       return -ENODEV;
+                       retval = -ENODEV;
+                       goto err_put_serial;
                }
        }
        /* END HORRIBLE HACK FOR PL2303 */
@@ -862,9 +859,8 @@ static int usb_serial_probe(struct usb_interface *interface,
                num_ports = num_bulk_out;
                if (num_ports == 0) {
                        dev_err(ddev, "Generic device with no bulk out, not allowed.\n");
-                       usb_serial_put(serial);
-                       module_put(type->driver.owner);
-                       return -EIO;
+                       retval = -EIO;
+                       goto err_put_serial;
                }
                dev_info(ddev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n");
                dev_info(ddev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n");
@@ -1085,9 +1081,13 @@ exit:
        return 0;
 
 probe_error:
+       retval = -EIO;
+err_put_serial:
        usb_serial_put(serial);
+err_put_module:
        module_put(type->driver.owner);
-       return -EIO;
+
+       return retval;
 }
 
 static void usb_serial_disconnect(struct usb_interface *interface)