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genirq: Add IRQF_RESUME_EARLY and resume such IRQs earlier

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This adds a mechanism to resume selected IRQs during syscore_resume
instead of dpm_resume_noirq.

Under Xen we need to resume IRQs associated with IPIs early enough
that the resched IPI is unmasked and we can therefore schedule
ourselves out of the stop_machine where the suspend/resume takes
place.

This issue was introduced by 676dc3cf5b "xen: Use IRQF_FORCE_RESUME".

Signed-off-by: Ian Campbell <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: xen-devel <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Cc: [email protected] (at least to 2.6.32.y)
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Ian Campbell 2011-10-03 15:37:00 +01:00 • committed by Thomas Gleixner
commit 9bab0b7fba
3 changed files with 45 additions and 8 deletions
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2
drivers/xen/events.c
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@ -1021,7 +1021,7 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
if (irq < 0)
return irq;
irqflags |= IRQF_NO_SUSPEND | IRQF_FORCE_RESUME;
irqflags |= IRQF_NO_SUSPEND | IRQF_FORCE_RESUME | IRQF_EARLY_RESUME;
retval = request_irq(irq, handler, irqflags, devname, dev_id);
if (retval != 0) {
unbind_from_irq(irq);