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 a51ed205016ec2c1fb63c52441e391c927ac4ea9..2b952b5386fd5eae72bcf6a7c8320d1768156277 100644 (file)
--- 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);