diff --git a/drivers/irqchip/irq-gic-v5-irs.c b/drivers/irqchip/irq-gic-v5-irs.c
index 3028a8bbbf68..0bd9ae9ae12e 100644
--- a/drivers/irqchip/irq-gic-v5-irs.c
+++ b/drivers/irqchip/irq-gic-v5-irs.c
@@ -874,6 +874,8 @@ static int __init gic_acpi_parse_iaffid(union acpi_subtable_headers *header,
 		return 0;
 
 	cpu = get_logical_index(gicc->arm_mpidr);
+	if (cpu < 0)
+		return 0;
 
 	if (gicc->iaffid & ~GENMASK(current_iaffid_bits - 1, 0)) {
 		pr_warn("CPU %d iaffid 0x%x exceeds IRS iaffid bits\n", cpu, gicc->iaffid);