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tty: serial: max310x: Check return code of gpiochip_remove

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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>
This commit is contained in:
Emil Goode 2012-08-18 18:12:48 +02:00 committed by Greg Kroah-Hartman
parent 1a16afa2ce
commit 23e7c6a765
1 changed files with 7 additions and 3 deletions
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10
drivers/tty/serial/max310x.c
View file

@ -1207,6 +1207,7 @@ static int __devexit max310x_remove(struct spi_device *spi)
{
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 @@ static int __devexit max310x_remove(struct spi_device *spi)
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 @@ static int __devexit max310x_remove(struct spi_device *spi)
devm_kfree(dev, s);
return 0;
return ret;
}
static const struct spi_device_id max310x_id_table[] = {