# Re: \[PATCH\] powerpc/smp: Do not disable IPI interrupts during suspend

- From: Kumar Gala \<hidden\>
- Date: 2012-07-27 21:58:46 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2012/07/3899979
- Thread: https://ratatoskr.run/linuxppc-dev/2012/07/3896451/t.md

```text

On Jul 20, 2012, at 7:47 AM, Zhao Chenhui wrote:

> 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.
>=20
> Signed-off-by: Zhao Chenhui <redacted>
> Signed-off-by: Li Yang <redacted>
> ---
> arch/powerpc/kernel/smp.c |    2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)

BenH,

Can you ack?

- k

>=20
> diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
> index fecb038..d26bbf8 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 =3D 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);
> --=20
> 1.6.4.1
>=20
```