linux-kernel - [tip:irq/urgent] irqchip/eznps: Acknowledge NPS

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Date:   Fri, 14 Oct 2016 05:30:42 -0700
From:   tip-bot for Noam Camus <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     noamca@...lanox.com, linux-kernel@...r.kernel.org,
        mingo@...nel.org, hpa@...or.com, tglx@...utronix.de
Subject: [tip:irq/urgent] irqchip/eznps: Acknowledge NPS_IPI before calling
 the handler

Commit-ID:  c0ca8df717061ae3d2ea624024033103c64210ae
Gitweb:     http://git.kernel.org/tip/c0ca8df717061ae3d2ea624024033103c64210ae
Author:     Noam Camus <noamca@...lanox.com>
AuthorDate: Thu, 13 Oct 2016 16:15:32 +0300
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 14 Oct 2016 14:26:54 +0200

irqchip/eznps: Acknowledge NPS_IPI before calling the handler

IPI_IRQ (also TIMER0_IRQ) should be acked 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 is
triggered again while the handler runs.

Fixes: 44df427c894a ("irqchip: add nps Internal and external irqchips")
Signed-off-by: Noam Camus <noamca@...lanox.com>
Cc: marc.zyngier@....com
Cc: jason@...edaemon.net
Cc: stable@...r.kernel.org
Link: http://lkml.kernel.org/r/1476364532-12634-1-git-send-email-noamca@mellanox.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 drivers/irqchip/irq-eznps.c | 4 ++--
 1 file 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,