irqchip/stm32-exti: Use kzalloc_flex

index 5fdf335acb46..144120cadfa0 100644
@@ -45,8 +45,8 @@ struct stm32_exti_chip_data {
 struct stm32_exti_host_data {
 	void __iomem *base;
 	struct device *dev;
-	struct stm32_exti_chip_data *chips_data;
 	const struct stm32_exti_drv_data *drv_data;
+	struct stm32_exti_chip_data chips_data[];
 };
 
 static const struct stm32_exti_bank stm32f4xx_exti_b1 = {

@@ -269,26 +269,20 @@ stm32_exti_host_data *stm32_exti_host_init(const struct stm32_exti_drv_data *dd,
 {
 	struct stm32_exti_host_data *host_data;
 
-	host_data = kzalloc_obj(*host_data);
+	host_data = kzalloc_flex(*host_data, chips_data, dd->bank_nr);
 	if (!host_data)
 		return NULL;
 
 	host_data->drv_data = dd;
-	host_data->chips_data = kzalloc_objs(struct stm32_exti_chip_data,
-					     dd->bank_nr);
-	if (!host_data->chips_data)
-		goto free_host_data;
 
 	host_data->base = of_iomap(node, 0);
 	if (!host_data->base) {
 		pr_err("%pOF: Unable to map registers\n", node);
-		goto free_chips_data;
+		goto free_host_data;
 	}
 
 	return host_data;
 
-free_chips_data:
-	kfree(host_data->chips_data);
 free_host_data:
 	kfree(host_data);
 

@@ -389,7 +383,6 @@ static int __init stm32_exti_init(const struct stm32_exti_drv_data *drv_data,
 	irq_domain_remove(domain);
 out_unmap:
 	iounmap(host_data->base);
-	kfree(host_data->chips_data);
 	kfree(host_data);
 	return ret;
 }