Input: fix open count handling in input interfaces

If input_open_device() fails we should not leave interfaces marked
as  opened.
Signed-off-by: NOliver Neukum <oneukum@suse.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

drivers/input/evdev.c

@@ -192,8 +192,11 @@ static int evdev_open_device(struct evdev *evdev)
 
 	if (!evdev->exist)
 		retval = -ENODEV;
-	else if (!evdev->open++)
+	else if (!evdev->open++) {
 		retval = input_open_device(&evdev->handle);
+		if (retval)
+			evdev->open--;
+	}
 
 	mutex_unlock(&evdev->mutex);
 	return retval;

drivers/input/joydev.c

@@ -205,8 +205,11 @@ static int joydev_open_device(struct joydev *joydev)
 
 	if (!joydev->exist)
 		retval = -ENODEV;
-	else if (!joydev->open++)
+	else if (!joydev->open++) {
 		retval = input_open_device(&joydev->handle);
+		if (retval)
+			joydev->open--;
+	}
 
 	mutex_unlock(&joydev->mutex);
 	return retval;

drivers/input/mousedev.c

@@ -428,8 +428,11 @@ static int mousedev_open_device(struct mousedev *mousedev)
 		mixdev_open_devices();
 	else if (!mousedev->exist)
 		retval = -ENODEV;
-	else if (!mousedev->open++)
+	else if (!mousedev->open++) {
 		retval = input_open_device(&mousedev->handle);
+		if (retval)
+			mousedev->open--;
+	}
 
 	mutex_unlock(&mousedev->mutex);
 	return retval;

drivers/input/tsdev.c

@@ -185,8 +185,11 @@ static int tsdev_open_device(struct tsdev *tsdev)
 
 	if (!tsdev->exist)
 		retval = -ENODEV;
-	else if (!tsdev->open++)
+	else if (!tsdev->open++) {
 		retval = input_open_device(&tsdev->handle);
+		if (retval)
+			tsdev->open--;
+	}
 
 	mutex_unlock(&tsdev->mutex);
 	return retval;