linux-kernel - [PATCH 2/2] regulator: don't compare raw GPIO descriptor pointers

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Message-Id: <20250407-gpiod-is-equal-v1-2-7d85f568ae6e@linaro.org>
Date: Mon, 07 Apr 2025 09:08:15 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Liam Girdwood <lgirdwood@...il.com>, 
 Mark Brown <broonie@...nel.org>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 2/2] regulator: don't compare raw GPIO descriptor pointers

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

There's no API contract saying that two GPIO descriptor pointers
obtained with a call to gpiod_get() (or one of the variants), that refer
to the same physical GPIO pin, always point to the same structure. Use
the dedicated comparator function.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/regulator/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 90629a756693..7a248dc8d2e2 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2617,7 +2617,7 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 	mutex_lock(&regulator_list_mutex);
 
 	list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
-		if (pin->gpiod == gpiod) {
+		if (gpiod_is_equal(pin->gpiod, gpiod)) {
 			rdev_dbg(rdev, "GPIO is already used\n");
 			goto update_ena_gpio_to_rdev;
 		}

-- 
2.45.2