[PATCH 1/4] irq: Add new IRQ flag IRQF_NO_SUSPEND

From: Ian Campbell
Date: Thu Jul 29 2010 - 06:17:45 EST

A small number of users of IRQF_TIMER are using it for the implied no
suspend behaviour on interrupts which are not timer interrupts.

Therefore add a new IRQF_NO_SUSPEND flag, rename IRQF_TIMER to
__IRQF_TIMER and redefine IRQF_TIMER in terms of these new flags.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Grant Likely <grant.likely@xxxxxxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Cc: linux-input@xxxxxxxxxxxxxxx
Cc: linuxppc-dev@xxxxxxxxxx
Cc: devicetree-discuss@xxxxxxxxxxxxxxxx
include/linux/interrupt.h | 7 ++++++-
kernel/irq/manage.c | 2 +-
2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index c233113..a0384a4 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -53,16 +53,21 @@
* IRQF_ONESHOT - Interrupt is not reenabled after the hardirq handler finished.
* Used by threaded interrupts which need to keep the
* irq line disabled until the threaded handler has been run.
+ * IRQF_NO_SUSPEND - Do not disable this IRQ during suspend
+ *
#define IRQF_DISABLED 0x00000020
#define IRQF_SAMPLE_RANDOM 0x00000040
#define IRQF_SHARED 0x00000080
#define IRQF_PROBE_SHARED 0x00000100
-#define IRQF_TIMER 0x00000200
+#define __IRQF_TIMER 0x00000200
#define IRQF_PERCPU 0x00000400
#define IRQF_NOBALANCING 0x00000800
#define IRQF_IRQPOLL 0x00001000
#define IRQF_ONESHOT 0x00002000
+#define IRQF_NO_SUSPEND 0x00004000

* Bits used by threaded handlers:
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index e149748..c3003e9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -216,7 +216,7 @@ static inline int setup_affinity(unsigned int irq, struct irq_desc *desc)
void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
if (suspend) {
- if (!desc->action || (desc->action->flags & IRQF_TIMER))
+ if (!desc->action || (desc->action->flags & IRQF_NO_SUSPEND))
desc->status |= IRQ_SUSPENDED;

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