gpio: sx1509b: Fix address-of-packed-mem warning

The warning below appears once -Waddress-of-packed-mem is enabled: /__w/zephyr/zephyr/drivers/gpio/gpio_sx1509b.c: In function 'port_write': /__w/zephyr/zephyr/drivers/gpio/gpio_sx1509b.c:456:19: error: taking address of packed member of 'struct sx1509b_pin_state' may result in an unaligned pointer value [-Werror=address-of-packed-member] 456 | uint16_t *outp = &drv_data->pin_state.data; To avoid the warning, use an intermediate void * variable. More info in zephyrproject-rtos#16587. Signed-off-by: Carles Cufi <[email protected]>
bibibibi89 · Dec 10, 2021 · 710e03b · 710e03b
1 parent 4f64ae3
commit 710e03b
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/drivers/gpio/gpio_sx1509b.c b/drivers/gpio/gpio_sx1509b.c
@@ -453,7 +453,10 @@ static int port_write(const struct device *dev,
 
 	const struct sx1509b_config *cfg = dev->config;
 	struct sx1509b_drv_data *drv_data = dev->data;
-	uint16_t *outp = &drv_data->pin_state.data;
+	void *data = &drv_data->pin_state.data;
+	uint16_t *outp = data;
+
+	__ASSERT_NO_MSG(IS_PTR_ALIGNED(data, uint16_t));
 
 	k_sem_take(&drv_data->lock, K_FOREVER);