linux-kernel - [PATCH] genirq: provide dummy set_irq

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Date:	Mon, 30 Mar 2015 16:15:45 +0300
From:	Roger Quadros <rogerq@...com>
To:	<tglx@...utronix.de>
CC:	<cw00.choi@...sung.com>, <balbi@...com>, <tony@...mide.com>,
	<linux-usb@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Roger Quadros <rogerq@...com>
Subject: [PATCH] genirq: provide dummy set_irq_wake()

Without this system suspend is broken on systems that have
drivers calling enable/disable_irq_wake() for interrupts based off
the dummy irq hook.
(e.g. drivers/gpio/gpio-pcf857x.c)

http://article.gmane.org/gmane.linux.kernel/1879035

Signed-off-by: Roger Quadros <rogerq@...com>
---
 kernel/irq/dummychip.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
index 988dc58..2405d7a 100644
--- a/kernel/irq/dummychip.c
+++ b/kernel/irq/dummychip.c
@@ -32,6 +32,11 @@ static unsigned int noop_ret(struct irq_data *data)
 	return 0;
 }
 
+static int noop_int_ret(struct irq_data *data, unsigned int val)
+{
+	return 0;
+}
+
 /*
  * Generic no controller implementation
  */
@@ -57,5 +62,6 @@ struct irq_chip dummy_irq_chip = {
 	.irq_ack	= noop,
 	.irq_mask	= noop,
 	.irq_unmask	= noop,
+	.irq_set_wake	= noop_int_ret,
 };
 EXPORT_SYMBOL_GPL(dummy_irq_chip);
-- 
2.1.0

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