1 files changed, 6 insertions, 0 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index c9c0601f0615..c35d74c08b50 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -37,6 +37,12 @@ int irq_set_chip(unsigned int irq, struct irq_chip *chip)
         irq_chip_set_defaults(chip);
         desc->irq_data.chip = chip;
         irq_put_desc_unlock(desc, flags);
+        /*
+         * For !CONFIG_SPARSE_IRQ make the irq show up in
+         * allocated_irqs. For the CONFIG_SPARSE_IRQ case, it is
+         * already marked, and this call is harmless.
+         */
+        irq_reserve_irq(irq);
         return 0;
 }
 EXPORT_SYMBOL(irq_set_chip);