On 05/30/2013 06:18 AM, Rafael J. Wysocki wrote: > On Wednesday, May 29, 2013 10:51:11 AM Alan Stern wrote: >> On Wed, 29 May 2013, Rafael J. Wysocki wrote: >> >>> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> >>> >>> The "runtime idle" helper routine, rpm_idle(), currently ignores >>> return values from .runtime_idle() callbacks executed by it. >>> >>> However, it turns out that many subsystems use the generic idle >>> callback routine pm_generic_runtime_idle() which checks the return >>> value of the driver's callback and executes pm_runtime_suspend() for >>> the device unless that value is different from 0. If that logic is >>> moved to rpm_idle() instead, pm_generic_runtime_idle() can be dropped >>> and its users will not need any .runtime_idle() callbacks any more. >> >> Since you're making this change, wouldn't it be a good idea to adopt >> Mika's original suggestion and turn on the RPM_AUTO bit in rpmflags >> when the use_autosuspend flag is set? > > I'm not actually sure. It can be done, but I'd prefer to do that as a separate > change in any case. For SCSI idle callback, that would be a welcome change, where instead of calling pm_runtime_autosuspend and then return -EBUSY, it can be changed to simply return 0 after mark_last_busy. Thanks, Aaron -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
