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Subject: [PATCH] genirq: update irq stats from NMI handlers
Thread-Topic: [PATCH] genirq: update irq stats from NMI handlers
Thread-Index: AQHVMiAiVz/XkkYfRk2+vKGjBsT7xw==
Date:   Thu, 4 Jul 2019 04:22:47 +0000
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The NMI handlers handle_percpu_devid_fasteoi_nmi() and
handle_fasteoi_nmi() added by commit 2dcf1fbcad35 ("genirq: Provide NMI
handlers") do not update the interrupt counts. Due to that the NMI
interrupt count does not show up correctly in /proc/interrupts.

Update the functions to fix this. With this change, we can see stats of
the perf NMI interrupts on arm64.

Fixes: 2dcf1fbcad35 ("genirq: Provide NMI handlers")

Signed-off-by: Shijith Thotton <sthotton@marvell.com>
---
 kernel/irq/chip.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 29d6c7d070b4..88d1e054c6ea 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -748,6 +748,8 @@ void handle_fasteoi_nmi(struct irq_desc *desc)
 	unsigned int irq =3D irq_desc_get_irq(desc);
 	irqreturn_t res;
=20
+	kstat_incr_irqs_this_cpu(desc);
+
 	trace_irq_handler_entry(irq, action);
 	/*
 	 * NMIs cannot be shared, there is only one action.
@@ -962,6 +964,8 @@ void handle_percpu_devid_fasteoi_nmi(struct irq_desc *d=
esc)
 	unsigned int irq =3D irq_desc_get_irq(desc);
 	irqreturn_t res;
=20
+	__kstat_incr_irqs_this_cpu(desc);
+
 	trace_irq_handler_entry(irq, action);
 	res =3D action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
 	trace_irq_handler_exit(irq, action, res);
--=20
2.17.0