On Monday 23 November 2009, Alan Stern wrote: > On Mon, 23 Nov 2009, Rafael J. Wysocki wrote: > > > On Sunday 22 November 2009, Alan Stern wrote: > > > Rafael: > > > > > > Here's the situation. Device A has children B1, ..., Bn (possibly > > > others too). I need to guarantee that whenever A is active, so are the > > > children. > > > > But it's perfectly valid to have an inactive device under an active parent, so > > I guess this is not a general case. > > Correct. It's a specific case that I need to handle for USB. > > > > Do you have any ideas on how to approach this? How about allowing A's > > > runtime_resume method to set A->power.runtime_status to RPM_ACTIVE, > > > before it tries to resume the B's? That would avoid the deadlock. > > > > I don't see a problem with that as long as the A's runtime_resume returns 0 in > > such a case. > > Should I export a routine from the PM core for doing this or just > implement it directly? Please implement that directly. If there's any other bus type needing it, we'll move it to the core. Thanks, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
