pinctrl: abx500: 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>

diff --git a/drivers/pinctrl/nomadik/pinctrl-abx500.c b/drivers/pinctrl/nomadik/pinctrl-abx500.c
index d3c32d809bac409fd3d8d45b8d8bf40e78f5cb49..80e3ac333136188dbba58222169d65c9be36bdf8 100644 (file)
--- a/drivers/pinctrl/nomadik/pinctrl-abx500.c
+++ b/drivers/pinctrl/nomadik/pinctrl-abx500.c
@@ -6,7 +6,9 @@
  *
  * Driver allows to use AxB5xx unused pins to be used as GPIO
  */
+
 #include <linux/bitops.h>
+#include <linux/cleanup.h>
 #include <linux/err.h>
 #include <linux/gpio/driver.h>
 #include <linux/init.h>
@@ -453,12 +455,11 @@ static void abx500_gpio_dbg_show_one(struct seq_file *s,
                                     unsigned offset, unsigned gpio)
 {
        struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
-       const char *label = gpiochip_is_requested(chip, offset - 1);
        u8 gpio_offset = offset - 1;
        int mode = -1;
        bool is_out;
        bool pd;
-       int ret;
+       int ret = -ENOMEM;
 
        const char *modes[] = {
                [ABX500_DEFAULT]        = "default",
@@ -474,6 +475,10 @@ static void abx500_gpio_dbg_show_one(struct seq_file *s,
                [ABX500_GPIO_PULL_UP]           = "pull up",
        };
 
+       char *label __free(kfree) = gpiochip_dup_line_label(chip, offset - 1);
+       if (IS_ERR(label))
+               goto out;
+
        ret = abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG,
                        gpio_offset, &is_out);
        if (ret < 0)