Lin Ming c8158819d5 block: implement runtime pm strategy
When a request is added:
    If device is suspended or is suspending and the request is not a
    PM request, resume the device.

When the last request finishes:
    Call pm_runtime_mark_last_busy().

When pick a request:
    If device is resuming/suspending, then only PM request is allowed
    to go.

The idea and API is designed by Alan Stern and described here:
http://marc.info/?l=linux-scsi&m=133727953625963&w=2

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-03-22 22:22:15 -06:00
..
2013-01-09 08:05:13 -08:00
2012-12-06 14:30:58 +01:00
2013-02-27 19:10:15 -08:00
2013-02-22 10:42:45 +01:00