There has been some evidence from surveys coming out of Russia that his approval rating has increased. This is probably to be expected. However, if you were to dive into it very closely, there's been a lot of debate over what that means.
I'll say, from my own evaluation, that the one thing that's been striking is that while his approval has increased, people don't trust him. This discrepancy between trust and approval is not what we observed in 2014. That should give us cause to stop and think about whether these indications of approval are simply a momentary “rally around the flag” effect that one would expect during any military campaign or whether they genuinely reflect support. I would argue it's more the former than the latter.