[RFC][v0][PATCH 1/1] ppc64: ignore interrupts while offline

With lazy interrupt, some implementations of hotplug will
get some interrupts even while offline, just ignore these.

Signed-off-by: Tiejun Chen <redacted>
---
  arch/powerpc/kernel/irq.c |    6 ++++++
  1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 4f97fe3..dbca574 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c

@@ -144,6 +144,12 @@ notrace unsigned int __check_irq_replay(void)
  	 */
  	unsigned char happened = local_paca->irq_happened;

+	/* Some implementations of hotplug will get some interrupts while
+	 * offline, just ignore these.
+	 */
+	if (cpu_is_offline(smp_processor_id()))
+		return 0;
+
  	/* Clear bit 0 which we wouldn't clear otherwise */
  	local_paca->irq_happened &= ~PACA_IRQ_HARD_DIS;