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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2023-11-03 21:53:08 +0200 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2023-12-13 11:28:37 +0000 |
| commit | 7d6766f5377686b871ab52c564327718ece233ad (patch) | |
| tree | e2a999c93fcab3c39f318821e26e3707ffa576d0 /drivers/leds/trigger | |
| parent | 9bbd6b7209cf1e26390975b7617a29901c8990a1 (diff) | |
| download | linux-7d6766f5377686b871ab52c564327718ece233ad.tar.gz linux-7d6766f5377686b871ab52c564327718ece233ad.tar.bz2 linux-7d6766f5377686b871ab52c564327718ece233ad.zip | |
leds: trigger: gpio: Convert to use kstrtox()
sscanf() is a heavy one and moreover requires additional boundary checks.
Convert driver to use kstrtou8() in gpio_trig_inverted_store().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20231103195310.948327-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'drivers/leds/trigger')
| -rw-r--r-- | drivers/leds/trigger/ledtrig-gpio.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/leds/trigger/ledtrig-gpio.c b/drivers/leds/trigger/ledtrig-gpio.c index d91ae7fde3cf..8a30f9228186 100644 --- a/drivers/leds/trigger/ledtrig-gpio.c +++ b/drivers/leds/trigger/ledtrig-gpio.c @@ -53,14 +53,12 @@ static ssize_t gpio_trig_brightness_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev); - unsigned desired_brightness; + u8 desired_brightness; int ret; - ret = sscanf(buf, "%u", &desired_brightness); - if (ret < 1 || desired_brightness > 255) { - dev_err(dev, "invalid value\n"); - return -EINVAL; - } + ret = kstrtou8(buf, 10, &desired_brightness); + if (ret) + return ret; gpio_data->desired_brightness = desired_brightness; |