devres: release resources on device_del()

Some platform devices are driven without driver attached, so managed
resources can be acquired without driver attached. Make sure such
resources are released by calling devres_release_all() in
device_del().

Signed-off-by: Tejun Heo <[e-mail]>
Signed-off-by: Jeff Garzik <[e-mail]>

drivers/base/core.c

···
 	device_remove_attrs(dev);
 	bus_remove_device(dev);
 
+	/*
+	 * Some platform devices are driven without driver attached
+	 * and managed resources may have been acquired.  Make sure
+	 * all resources are released.
+	 */
+	devres_release_all(dev);
+
 	/* Notify the platform of the removal, in case they
 	 * need to do anything...
 	 */