1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index 8743d62fded7..95575d8d5392 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -359,6 +359,9 @@ static int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
 
         idx = hw_irq % dgc->irqs_per_chip;
 
+        if (test_bit(idx, &gc->unused))
+                return -ENOTSUPP;
+
         if (test_bit(idx, &gc->installed))
                 return -EBUSY;