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Date: Tue, 12 Mar 2013 01:59:13 +0800 From: Chuansheng Liu <chuansheng.liu@...el.com> To: tglx@...utronix.de Cc: mingo@...hat.com, linux-kernel@...r.kernel.org, chuansheng.liu@...el.com Subject: [PATCH 3/3] genirq: Give warning in case calling irq_set_irq_wake with _NO_SUSPEND flag When one irq is setup with flag IRQF_NO_SUSPEND, it is pointless to call irq_set_irq_wake(). Because check_wakeup_irqs() is just checking the irq which has pending but is in IRQS_SUSPENDED state when do syscore_suspend(). Signed-off-by: liu chuansheng <chuansheng.liu@...el.com> --- kernel/irq/manage.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index fa17855..94c5af9 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -513,6 +513,14 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on) if (!desc) return -EINVAL; + /* Checking if the flag IRQF_NO_SUSPEND is set, + * if set, drivers do not need to call irq_set_irq_wake(), + * it is pointless. + */ + if (!desc->action || (desc->action->flags & IRQF_NO_SUSPEND)) + WARN(1, "IRQ %d with flag IRQF_NO_SUSPEND, no need to call here\n", + irq); + /* wakeup-capable irqs can be shared between drivers that * don't need to have the same sleep mode behaviors. */ -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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