On Wed, 2 Dec 2009, Mahalingam, Nithish wrote: > Hi Rafael, > > I see that in most of the internal runtime functions > (__pm_runtime_suspend, __pm_runtime_resume, __pm_runtime_set_status > etc.) without any explicit check to see if the dev->parent supports > runtime PM there is access to its runtime PM fields. I guess there > can be a use case where a device supports runtime PM but its parent > does not. Am I missing something here? That's right. For example, in theory there could be a situation where the PCI subsystem didn't include runtime PM support but the SCSI subsystem did. Then you could have a SCSI target device (with support) whose parent was a PCI SCSI host adapter (without support). (Actually that example couldn't happen, because PCI is one of the first subsystems to support runtime PM. But you get the idea.) Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
