From: Zhao Chenhui <chenhui.zhao@freescale.com>
Date: Fri, 20 Jul 2012 12:47:01 +0000 (+0800)
Subject: powerpc/smp: Do not disable IPI interrupts during suspend
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=e6651de9cc701ab4829b3a11a7ace85a79405d32;p=deliverable%2Flinux.git

powerpc/smp: Do not disable IPI interrupts during suspend

During suspend, all interrupts including IPI will be disabled. In this case,
the suspend process will hang in SMP. To prevent this, pass the flag
IRQF_NO_SUSPEND when requesting IPI irq.

Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a51ed205016e..2b952b5386fd 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -171,7 +171,7 @@ int smp_request_message_ipi(int virq, int msg)
 	}
 #endif
 	err = request_irq(virq, smp_ipi_action[msg],
-			  IRQF_PERCPU | IRQF_NO_THREAD,
+			  IRQF_PERCPU | IRQF_NO_THREAD | IRQF_NO_SUSPEND,
 			  smp_ipi_name[msg], 0);
 	WARN(err < 0, "unable to request_irq %d for %s (rc %d)\n",
 		virq, smp_ipi_name[msg], err);