Comment by lmm

How much does it actually improve? E.g. if it's about having the driver understand the state of the device when coming back from suspend more closely, then I can see how theoretically that might be better - and I can also see how a cruder model with a less detailed interface might end up with higher reliability in practice (at the cost of being notionally slower to wake up and doing more reinitialisation etc. - but that might still end up being a good tradeoff).