ARCv2: IRQ: Call entry/exit functions for chained handlers in MCIP

It is necessary to call entry/exit functions for parent interrupt
controllers for proper masking/unmasking of interrupt lines.

Signed-off-by: Yuriy Kolerov <yuriy.kolerov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arc/kernel/mcip.c b/arch/arc/kernel/mcip.c
index 560c4afc2af4..9274f8ade8c7 100644
--- a/arch/arc/kernel/mcip.c
+++ b/arch/arc/kernel/mcip.c
@@ -10,6 +10,7 @@
 
 #include <linux/smp.h>
 #include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
 #include <linux/spinlock.h>
 #include <soc/arc/mcip.h>
 #include <asm/irqflags-arcv2.h>
@@ -221,10 +222,13 @@ static irq_hw_number_t idu_first_hwirq;
 static void idu_cascade_isr(struct irq_desc *desc)
 {
         struct irq_domain *idu_domain = irq_desc_get_handler_data(desc);
+        struct irq_chip *core_chip = irq_desc_get_chip(desc);
         irq_hw_number_t core_hwirq = irqd_to_hwirq(irq_desc_get_irq_data(desc));
         irq_hw_number_t idu_hwirq = core_hwirq - idu_first_hwirq;
 
+        chained_irq_enter(core_chip, desc);
         generic_handle_irq(irq_find_mapping(idu_domain, idu_hwirq));
+        chained_irq_exit(core_chip, desc);
 }
 
 static int idu_irq_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hwirq)