diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-12-04 10:35:01 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-12-08 09:26:20 +0100 |
| commit | 1610cd5f7468d4d8b54a96b82109c6ae66ee24eb (patch) | |
| tree | be2881c8c0e1f981757b39d7dea64523b7525349 /drivers/gpio | |
| parent | ee25fba76acd8324f9de6628872c8c612a684209 (diff) | |
gpio: wm831x: use gpiochip_dup_line_label()
Use the new gpiochip_dup_line_label() helper to safely retrieve the
descriptor label.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-wm831x.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c index 7eaf8a28638c..f7d5120ff8f1 100644 --- a/drivers/gpio/gpio-wm831x.c +++ b/drivers/gpio/gpio-wm831x.c @@ -8,6 +8,7 @@ * */ +#include <linux/cleanup.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/module.h> @@ -160,18 +161,21 @@ static void wm831x_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) for (i = 0; i < chip->ngpio; i++) { int gpio = i + chip->base; int reg; - const char *label, *pull, *powerdomain; + const char *pull, *powerdomain; /* We report the GPIO even if it's not requested since * we're also reporting things like alternate * functions which apply even when the GPIO is not in * use as a GPIO. */ - label = gpiochip_is_requested(chip, i); - if (!label) - label = "Unrequested"; + char *label __free(kfree) = gpiochip_dup_line_label(chip, i); + if (IS_ERR(label)) { + dev_err(wm831x->dev, "Failed to duplicate label\n"); + continue; + } - seq_printf(s, " gpio-%-3d (%-20.20s) ", gpio, label); + seq_printf(s, " gpio-%-3d (%-20.20s) ", + gpio, label ?: "Unrequested"); reg = wm831x_reg_read(wm831x, WM831X_GPIO1_CONTROL + i); if (reg < 0) { |