Messages in this thread | | | Date | Wed, 11 Feb 2015 10:11:59 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v4 3/5] irqchip: Add DT binding doc for the virtual irq demuxer chip |
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On Tue, Feb 10, 2015 at 08:48:36PM +0000, Mark Rutland wrote: > From f390ccbb31f06efee49b4469943c8d85d963bfb5 Mon Sep 17 00:00:00 2001 > From: Mark Rutland <mark.rutland@arm.com> > Date: Tue, 10 Feb 2015 20:14:33 +0000 > Subject: [PATCH] genirq: allow mixed IRQF_NO_SUSPEND requests > > In some cases a physical IRQ line may be shared between devices from > which we expect interrupts during suspend (e.g. timers) and those we do > not (e.g. anything we cut the power to). Where a driver did not request > the interrupt with IRQF_NO_SUSPEND, it's unlikely that it can handle > being called during suspend, and it may bring down the system. > > This patch adds logic to automatically mark the irqactions for these > potentially unsafe handlers as disabled during suspend, leaving actions > with IRQF_NO_SUSPEND enabled. If an interrupt is raised on a shared line > during suspend, only the handlers requested with IRQF_NO_SUSPEND will be > called. The handlers requested without IRQF_NO_SUSPEND will be skipped > as if they had immediately returned IRQF_NONE. > > Cc: Boris Brezillon <boris.brezillon@free-electrons.com> > Cc: Jason Cooper <jason@lakedaemon.net> > Cc: Nicolas Ferre <nicolas.ferre@atmel.com> > Cc: Peter Zijlstra <peterz@infradead.org> > Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > Cc: Thomas Gleixner <tglx@linutronix.de> > Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Aw gawd.. not that again.
So Rafael and tglx went over this a few months ago I think:
lkml.kernel.org/r/26580319.OZP7jvJnA9@vostro.rjw.lan
is the last series I could find. Maybe Rafael can summarize?
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