On Mon, 1 Jul 2019, Oliver Neukum wrote: > Am Donnerstag, den 27.06.2019, 09:52 -0400 schrieb Alan Stern: > > > > > Or maybe the WAIT_FOR_RESUME ioctl returns because there was a remote > > wakeup. In this case also you would call FORBID_SUSPEND. > > > > In fact, you should call FORBID_SUSPEND _whenever_ WAIT_FOR_RESUME > > Well, this kind of indicates that the original syscall should bump > the counter. Perhaps it does, but... > > returns, unless your program has decided not to use the device any more > > (in which case you don't care whether the device is suspended or > > resumed). > > Then you should close the device. Exactly. Suppose WAIT_FOR_RESUME is interrupted and then the program closes the device. There's no need to force the device back to full power in this situation. Alan Stern
