[PATCH 3.16.y-ckt 067/180] MIPS: Loongson-3: Add IRQF_NO_SUSPEND to Cascade irqaction

[Luis Henriques]

3.16.7-ckt11 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Huacai Chen <chenhc at lemote.com>

commit 0add9c2f1cff9f3f1f2eb7e9babefa872a9d14b9 upstream.

HPET irq is routed to i8259 and then to MIPS CPU irq (cascade). After
commit a3e6c1eff5 (MIPS: IRQ: Fix disable_irq on CPU IRQs), if without
IRQF_NO_SUSPEND in cascade_irqaction, HPET interrupts will lost during
suspend. The result is machine cannot be waken up.

Signed-off-by: Huacai Chen <chenhc at lemote.com>
Cc: Steven J. Hill <Steven.Hill at imgtec.com>
Cc: linux-mips at linux-mips.org
Cc: Fuxin Zhang <zhangfx at lemote.com>
Cc: Zhangjin Wu <wuzhangjin at gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/9528/
Signed-off-by: Ralf Baechle <ralf at linux-mips.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 arch/mips/loongson/loongson-3/irq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/loongson/loongson-3/irq.c b/arch/mips/loongson/loongson-3/irq.c
index f240828181ff..f2077f201a2a 100644
--- a/arch/mips/loongson/loongson-3/irq.c
+++ b/arch/mips/loongson/loongson-3/irq.c
@@ -42,6 +42,7 @@ void mach_irq_dispatch(unsigned int pending)
 
 static struct irqaction cascade_irqaction = {
 	.handler = no_action,
+	.flags = IRQF_NO_SUSPEND,
 	.name = "cascade",
 };