diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index f1050ef5fb05..a0091aaaf0f1 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -229,6 +229,10 @@ static irqreturn_t rockchip_saradc_isr(int irq, void *dev_id)
 	unsigned long flags;
 #endif
 
+	/* Nothing need to do if info->last_chan not ready */
+	if (!info->last_chan)
+		return IRQ_HANDLED;
+
 	/* Read value */
 	info->last_val = rockchip_saradc_read(info);
 #ifndef CONFIG_ROCKCHIP_SARADC_TEST_CHN