From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 2 Mar 2011 10:49:21 +0000 (+0100)
Subject: genirq: Fixup fasteoi handler for oneshot mode
X-Git-Tag: firefly_0821_release~7613^2~2231^2~9^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c69e3758ff56d03e161187355791ec992c574276;p=firefly-linux-kernel-4.4.55.git

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>
---

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index b5145654855f..c9c0601f0615 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);