The following series of three patches implements a runtime power management interface for the SCSI subsystem. This initial implementation is very crude; only devices driven by sd are affected, and then only when their device files aren't open. There is no connection with SCSI transport classes, although such connections could easily be added at well-defined points in the new code. Patch 1/3 prepares the way by converting the old-style PM callbacks used by the SCSI midlayer over to the new dev_pm_ops framework. The callback pointers and routines are rearranged, but they continue to function as before. Patch 2/3 provides the midlayer mechanism for runtime PM. The existing driver callbacks are used for runtime suspend and resume, and there are provisions for making sure that devices are not suspended at important times (during probe, remove, or while the error handler is running). However this patch doesn't change the high-level drivers, which means nothing will use the new runtime PM machinery. Patch 3/3 adds support for runtime PM to sd. There is a fourth patch to follow, adding runtime PM support to usb-storage. Because it affects a different subsystem, I will delay submitting it until this earlier material has been approved. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
