[PATCH 4.0 042/220] MIPS: Loongson-3: Add IRQF_NO_SUSPEND to Cascade irqaction

From: Greg Kroah-Hartman
Date: Sat May 02 2015 - 17:23:25 EST


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

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

From: Huacai Chen <chenhc@xxxxxxxxxx>

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@xxxxxxxxxx>
Cc: Steven J. Hill <Steven.Hill@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: Fuxin Zhang <zhangfx@xxxxxxxxxx>
Cc: Zhangjin Wu <wuzhangjin@xxxxxxxxx>
Patchwork: https://patchwork.linux-mips.org/patch/9528/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
arch/mips/loongson/loongson-3/irq.c | 1 +
1 file changed, 1 insertion(+)

--- a/arch/mips/loongson/loongson-3/irq.c
+++ b/arch/mips/loongson/loongson-3/irq.c
@@ -44,6 +44,7 @@ void mach_irq_dispatch(unsigned int pend

static struct irqaction cascade_irqaction = {
.handler = no_action,
+ .flags = IRQF_NO_SUSPEND,
.name = "cascade",
};



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