On Monday 23 February 2009, Arve Hjønnevåg wrote: > On Sun, Feb 22, 2009 at 9:39 AM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > From: Rafael J. Wysocki <rjw@xxxxxxx> > > > > Introduce two helper functions allowing us to disable device > > interrupts (at the IO-APIC level) during suspend or hibernation > > and enable them during the subsequent resume, respectively, so that > > the timer interrupts are enabled while "late" suspend callbacks and > > "early" resume callbacks provided by device drivers are being > > executed. > > > > Use these functions to rework the handling of interrupts during > > suspend (hibernation) and resume. Namely, interrupts will only be > > disabled on the CPU right before suspending sysdevs, while device > > interrupts will be disabled (at the IO-APIC level), with the help of > > the new helper function, before calling "late" suspend callbacks > > provided by device drivers and analogously during resume. > > > > What impact does this have on wakeup interrupts? Unless you add a > check, after masking all interrupt at the CPU, to abort suspend if any > wakeup interrupt has IRQ_PENDING set I think you will loose wakeup > interrupts (at least for irqs that use default_disable). I _think_ they would have to be reenabled after we've called local_irq_disable(). Thanks, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
