linux-kernel - [PATCH] irqchip: acknowledge to NPS

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Date:   Thu, 13 Oct 2016 16:15:32 +0300
From:   Noam Camus <noamca@...lanox.com>
To:     <tglx@...utronix.de>, <jason@...edaemon.net>,
        <marc.zyngier@....com>
CC:     <linux-kernel@...r.kernel.org>, Noam Camus <noamca@...lanox.com>
Subject: [PATCH] irqchip: acknowledge to NPS_IPI before handler

From: Noam Camus <noamca@...lanox.com>

IPI_IRQ (also TIMER0_IRQ) should ack before the action->handler is called
in handle_percpu_devid_irq.
The IPI irq is edge sensitive and we might miss an IPI interrupt
if it was triggered during handling the interrupt itself.

Signed-off-by: Noam Camus <noamca@...lanox.com>
---
 drivers/irqchip/irq-eznps.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-eznps.c b/drivers/irqchip/irq-eznps.c
index efbf0e4..ebc2b0b 100644
--- a/drivers/irqchip/irq-eznps.c
+++ b/drivers/irqchip/irq-eznps.c
@@ -85,7 +85,7 @@ static void nps400_irq_eoi_global(struct irq_data *irqd)
 	nps_ack_gic();
 }
 
-static void nps400_irq_eoi(struct irq_data *irqd)
+static void nps400_irq_ack(struct irq_data *irqd)
 {
 	unsigned int __maybe_unused irq = irqd_to_hwirq(irqd);
 
@@ -103,7 +103,7 @@ static struct irq_chip nps400_irq_chip_percpu = {
 	.name		= "NPS400 IC",
 	.irq_mask	= nps400_irq_mask,
 	.irq_unmask	= nps400_irq_unmask,
-	.irq_eoi	= nps400_irq_eoi,
+	.irq_ack	= nps400_irq_ack,
 };
 
 static int nps400_irq_map(struct irq_domain *d, unsigned int virq,
-- 
1.7.1