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gpio: mockup: dynamically allocate memory for chip name 

Currently the chip name buffer is allocated on the stack and the
address of the buffer is passed to the gpio framework. It's invalid
after probe() returns, so the sysfs label attribute displays garbage.

Use devm_kasprintf() for each string instead.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Bartosz Golaszewski 2016-12-20 12:28:19 +01:00 committed by Linus Walleij
parent e53c60289d
commit ad6d8004fa
1 changed files with 7 additions and 3 deletions
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10
drivers/gpio/gpio-mockup.c
View File

@ -126,7 +126,7 @@ static int mockup_gpio_probe(struct platform_device *pdev)
int i;
int base;
int ngpio;
char chip_name[sizeof(GPIO_NAME) + 3];
char *chip_name;
if (gpio_mockup_params_nr < 2)
return -EINVAL;
@ -146,8 +146,12 @@ static int mockup_gpio_probe(struct platform_device *pdev)
ngpio = gpio_mockup_ranges[i * 2 + 1] - base;
if (ngpio >= 0) {
sprintf(chip_name, "%s-%c", GPIO_NAME,
pins_name_start + i);
chip_name = devm_kasprintf(dev, GFP_KERNEL,
"%s-%c", GPIO_NAME,
pins_name_start + i);
if (!chip_name)
return -ENOMEM;
ret = mockup_gpio_add(dev, &cntr[i],
chip_name, base, ngpio);
} else {