Patch "irqchip/eznps: Acknowledge NPS_IPI before calling the handler" has been added to the 4.8-stable tree

Patch "irqchip/eznps: Acknowledge NPS_IPI before calling the handler" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    irqchip/eznps: Acknowledge NPS_IPI before calling the handler

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     irqchip-eznps-acknowledge-nps_ipi-before-calling-the-handler.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c0ca8df717061ae3d2ea624024033103c64210ae Mon Sep 17 00:00:00 2001
From: Noam Camus <noamca@mellanox.com>
Date: Thu, 13 Oct 2016 16:15:32 +0300
Subject: irqchip/eznps: Acknowledge NPS_IPI before calling the handler

From: Noam Camus <noamca@mellanox.com>

commit c0ca8df717061ae3d2ea624024033103c64210ae upstream.

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@mellanox.com>
Cc: marc.zyngier@arm.com
Cc: jason@lakedaemon.net
Link: http://lkml.kernel.org/r/1476364532-12634-1-git-send-email-noamca@mellanox.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/irqchip/irq-eznps.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/irqchip/irq-eznps.c
+++ b/drivers/irqchip/irq-eznps.c
@@ -85,7 +85,7 @@ static void nps400_irq_eoi_global(struct
 	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_p
 	.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,


Patches currently in stable-queue which might be from noamca@mellanox.com are

queue-4.8/irqchip-eznps-acknowledge-nps_ipi-before-calling-the-handler.patch