1 files changed, 3 insertions, 0 deletions

diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c
index 0cec43dc3f60..87f15d64afa2 100644
--- a/arch/mips/lantiq/irq.c
+++ b/arch/mips/lantiq/irq.c
@@ -297,6 +297,9 @@ static int icu_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
         struct irq_chip *chip = &ltq_irq_type;
         int i;
 
+        if (hw < MIPS_CPU_IRQ_CASCADE)
+                return 0;
+
         for (i = 0; i < exin_avail; i++)
                 if (hw == ltq_eiu_irq[i])
                         chip = &ltq_eiu_type;