diff --git a/arch/arm/mach-mmp/irq.c b/arch/arm/mach-mmp/irq.c
index e60c7d98922b..3c71246cd994 100644
--- a/arch/arm/mach-mmp/irq.c
+++ b/arch/arm/mach-mmp/irq.c
@@ -153,10 +153,8 @@ static void icu_mux_irq_demux(unsigned int irq, struct irq_desc *desc)
 		status = readl_relaxed(data->reg_status) & ~mask;
 		if (status == 0)
 			break;
-		n = find_first_bit(&status, BITS_PER_LONG);
-		while (n < BITS_PER_LONG) {
+		for_each_set_bit(n, &status, BITS_PER_LONG) {
 			generic_handle_irq(icu_data[i].virq_base + n);
-			n = find_next_bit(&status, BITS_PER_LONG, n + 1);
 		}
 	}
 }