Hi Hans, >>>>> The pm_runtime_set_suspended() call in bcm_close() is intended as a >>>>> counterpart to the pm_runtime_set_active() call from bcm_request_irq() >>>>> (which gets called from bcm_setup()). >>>>> >>>>> The pm_runtime_set_active() call only happens if our pre-requisites for >>>>> doing runtime-pm are met. This commit adds the same check to the >>>>> pm_runtime_set_suspended() call to avoid the runtime-pm state getting >>>>> stuck in suspended after after a bcm_close(). >>>> >>>> Have you actually observed the state getting stuck in suspended? >>>> I'm asking because I don't quite see how this could happen: >>>> pm_runtime_set_suspended() becomes a no-op unless runtime PM is disabled. >>>> Now, a few lines further up in bcm_close(), pm_runtime_disable() is only >>>> called under the conditions you're adding here. If it's not called, >>>> pm_runtime_set_suspended() doesn't have any effect anyway so adding the >>>> conditions is pointless. Am I missing something? >>> >>> All devices start with runtime-pm disabled and on devices without >>> an IRQ we never enable it. So when the pm_runtime_set_suspended() >>> gets called runtime-pm is still in its initial disabled state. >> Okay but the device's initial state is set to RPM_SUSPENDED by >> pm_runtime_init() and AFAICS neither the platform nor acpi buses >> subsequently set it to RPM_ACTIVE, so the device is in suspended >> state anyway, unless I've overlooked some detail. > > Ah, no you're right, I assumed that devices would default to > RPM_ACTIVE (which corresponds to value 0), but you are right > they are set to suspended by default. > > So this patch can be dropped. > > Marcel: It would still be nice to get the second patch from > this series merged. can you resent that patch? And should it also go into stable? Regards Marcel -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
