tty: serial: max310x: Check return code of gpiochip_remove
The gpiochip_remove function may fail to remove a gpio_chip
if any GPIOs are still requested. This patch informs the caller
of such a senario.
Sparse is warning because the function prototype has a
__must_check annotation.
Sparse warning:
drivers/tty/serial/max310x.c:1223:18: warning:
ignoring return value of ‘gpiochip_remove’,
declared with attribute warn_unused_result
[-Wunused-result]
Signed-off-by: Emil Goode <emilgoode@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 534e448..06ff5ad 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1207,6 +1207,7 @@
{
struct device *dev = &spi->dev;
struct max310x_port *s = dev_get_drvdata(dev);
+ int ret = 0;
dev_dbg(dev, "Removing port\n");
@@ -1219,8 +1220,11 @@
uart_unregister_driver(&s->uart);
#ifdef CONFIG_GPIOLIB
- if (s->pdata->gpio_base)
- gpiochip_remove(&s->gpio);
+ if (s->pdata->gpio_base) {
+ ret = gpiochip_remove(&s->gpio);
+ if (ret)
+ dev_err(dev, "Failed to remove gpio chip: %d\n", ret);
+ }
#endif
dev_set_drvdata(dev, NULL);
@@ -1232,7 +1236,7 @@
devm_kfree(dev, s);
- return 0;
+ return ret;
}
static const struct spi_device_id max310x_id_table[] = {