On Sat, 5 Dec 2009, Mahalingam, Nithish wrote: > > The most troublesome case arises when you have a parent which is > > disabled for runtime PM and later on becomes enabled. This may not > > happen very often -- it may not happen at all. I would expect that if > > a device changes from disabled to enabled, it probably does so before > > acquiring any children. But we can't be certain of this. > > OK, get what you are saying. I was thinking of a particular use case and > before I talk about that let me prototype and see if I hit this > particular case. All right. If it does turn out that devices _never_ change from disabled to enabled while they have children (we could add a check for this!) then you are right -- it's not necessary to update parent->power.child_count if the parent is disabled. But the only way to be sure it will never happen is to forbid it explicitly in the documentation. Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
