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). -- Arve Hjønnevåg _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
