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gpio: exar: add a check for the return value of ida_simple_get fails 

ida_simple_get may fail and return a negative error number.
The fix checks its return value; if it fails, go to err_destroy.

Cc: <stable@vger.kernel.org>
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Kangjie Lu 2019-03-08 22:07:57 -06:00 committed by Bartosz Golaszewski
parent 9e98c678c2
commit 7ecced0934
1 changed files with 2 additions and 0 deletions
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2
drivers/gpio/gpio-exar.c
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@ -148,6 +148,8 @@ static int gpio_exar_probe(struct platform_device *pdev)
mutex_init(&exar_gpio->lock);
index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL);
if (index < 0)
goto err_destroy;
sprintf(exar_gpio->name, "exar_gpio%d", index);
exar_gpio->gpio_chip.label = exar_gpio->name;