genirq: Fixup fasteoi handler for oneshot mode

The fasteoi handler must mask the interrupt line in oneshot mode
otherwise we end up with an irq storm.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index b5145654855..c9c0601f061 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -513,6 +513,10 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
 		mask_irq(desc);
 		goto out;
 	}
+
+	if (desc->istate & IRQS_ONESHOT)
+		mask_irq(desc);
+
 	preflow_handler(desc);
 	handle_irq_event(desc);