linux-kernel - [PATCH v2 07/10] pinctrl: baytrail: use gpiochip_dup_line

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Message-Id: <20231130134630.18198-8-brgl@bgdev.pl>
Date:   Thu, 30 Nov 2023 14:46:27 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH v2 07/10] pinctrl: baytrail: use gpiochip_dup_line_label()

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Use the new gpiochip_dup_line_label() helper to safely retrieve the
descriptor label.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/pinctrl/intel/pinctrl-baytrail.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/intel/pinctrl-baytrail.c b/drivers/pinctrl/intel/pinctrl-baytrail.c
index 3cd0798ee631..3c8c02043481 100644
--- a/drivers/pinctrl/intel/pinctrl-baytrail.c
+++ b/drivers/pinctrl/intel/pinctrl-baytrail.c
@@ -9,6 +9,7 @@
 #include <linux/acpi.h>
 #include <linux/array_size.h>
 #include <linux/bitops.h>
+#include <linux/cleanup.h>
 #include <linux/gpio/driver.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -1173,7 +1174,6 @@ static void byt_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 		const char *pull_str = NULL;
 		const char *pull = NULL;
 		unsigned long flags;
-		const char *label;
 		unsigned int pin;
 
 		pin = vg->soc->pins[i].number;
@@ -1200,9 +1200,10 @@ static void byt_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 			seq_printf(s, "Pin %i: can't retrieve community\n", pin);
 			continue;
 		}
-		label = gpiochip_is_requested(chip, i);
-		if (!label)
-			label = "Unrequested";
+
+		char *label __free(kfree) = gpiochip_dup_line_label(chip, i);
+		if (IS_ERR(label))
+			continue;
 
 		switch (conf0 & BYT_PULL_ASSIGN_MASK) {
 		case BYT_PULL_ASSIGN_UP:
@@ -1231,7 +1232,7 @@ static void byt_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 		seq_printf(s,
 			   " gpio-%-3d (%-20.20s) %s %s %s pad-%-3d offset:0x%03x mux:%d %s%s%s",
 			   pin,
-			   label,
+			   label ?: "Unrequested",
 			   val & BYT_INPUT_EN ? "  " : "in",
 			   val & BYT_OUTPUT_EN ? "   " : "out",
 			   str_hi_lo(val & BYT_LEVEL),
-- 
2.40.1