linux-kernel - [PATCH 1/3] x86, io_apic: Adding the flag IRQCHIP_SKIP_SET

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Date:	Tue, 12 Mar 2013 01:55:11 +0800
From:	Chuansheng Liu <chuansheng.liu@...el.com>
To:	tglx@...utronix.de, joro@...tes.org
Cc:	mingo@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] x86, io_apic: Adding the flag IRQCHIP_SKIP_SET_WAKE


Currently for an ioapic chip irq, if we call irq_set_irq_wake()
we will get the ENXIO returning error, but some drivers need the
wake-up interrupts pending mechanism.

Here adding the flag IRQCHIP_SKIP_SET_WAKE instead of emtpy callback.

Signed-off-by: liu chuansheng <chuansheng.liu@...el.com>
---
 arch/x86/kernel/apic/io_apic.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 9ed796c..7d0baf7 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2520,6 +2520,7 @@ static struct irq_chip ioapic_chip __read_mostly = {
 	.irq_eoi		= ack_apic_level,
 	.irq_set_affinity	= native_ioapic_set_affinity,
 	.irq_retrigger		= ioapic_retrigger_irq,
+	.flags			= IRQCHIP_SKIP_SET_WAKE,
 };
 
 static inline void init_IO_APIC_traps(void)
-- 
1.7.0.4



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