if you´ve moved the little pin or lever near the door latch, that´s it, but.... if it wont open from the inside after this, and the inner handle is a bit out of place (a bit misaligned), you will most likely need to replace the complete inner handle, since the plastic gears that move the mechanisms must have broken, it´s a pretty easy job, i´ve done it on both back doors, just remember to clean and lube the whole mechanisms to avoid it from happening again.