[PATCH 3/3] nvme: Enable autonomous power state transitions

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+?????/*
+??????* By default, allow up to 25ms of APST-induced
latency.??This will
+??????* have no effect on non-APST supporting controllers
(i.e.
any
+??????* controller with APSTA == 0).
+??????*/
+?????ctrl->apst_max_latency_ns = 25000000;

Is it possible to make that a #define please?

I'll make it a module parameter as Keith suggested.

One question, though: should we call this and the sysfs parameter
apst_max_latency or should it be more generically
power_save_max_latency???The idea is that we might want to support
non-automonous transitions some day or even runtime D3.??Or maybe
those should be separately configured if used.

I read the spec and reviewed your latest patchset. ?Personally for me I
like having the field names from the NVMe spec in the names of the
Linux implementation because it makes it easier to find and relate the
two. ?So apst_max_latency makes more sense to me, as this is a
'apst'(e/a) NVMe feature.

--Andy

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