linux-kernel - [PATCH 16/21] gpio: of: correct notifier return codes

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Message-Id: <20230905185309.131295-17-brgl@bgdev.pl>
Date:   Tue,  5 Sep 2023 20:53:04 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Aaro Koskinen <aaro.koskinen@....fi>,
        Janusz Krzysztofik <jmkrzyszt@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        Russell King <linux@...linux.org.uk>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Dipen Patel <dipenp@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-acpi@...r.kernel.org, timestamp@...ts.linux.dev,
        linux-tegra@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 16/21] gpio: of: correct notifier return codes

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

According to the comments in linux/notifier.h, the code to return when a
notifications is "not for us" is NOTIFY_DONE, not NOTIFY_OK.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpiolib-of.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 531faabead0f..5515f32cf19b 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -834,14 +834,14 @@ static int of_gpio_notify(struct notifier_block *nb, unsigned long action,
 	switch (of_reconfig_get_state_change(action, arg)) {
 	case OF_RECONFIG_CHANGE_ADD:
 		if (!of_property_read_bool(rd->dn, "gpio-hog"))
-			return NOTIFY_OK;	/* not for us */
+			return NOTIFY_DONE;	/* not for us */
 
 		if (of_node_test_and_set_flag(rd->dn, OF_POPULATED))
-			return NOTIFY_OK;
+			return NOTIFY_DONE;
 
 		chip = of_find_gpiochip_by_node(rd->dn->parent);
 		if (chip == NULL)
-			return NOTIFY_OK;	/* not for us */
+			return NOTIFY_DONE;	/* not for us */
 
 		ret = of_gpiochip_add_hog(chip, rd->dn);
 		if (ret < 0) {
@@ -850,22 +850,22 @@ static int of_gpio_notify(struct notifier_block *nb, unsigned long action,
 			of_node_clear_flag(rd->dn, OF_POPULATED);
 			return notifier_from_errno(ret);
 		}
-		break;
+		return NOTIFY_OK;
 
 	case OF_RECONFIG_CHANGE_REMOVE:
 		if (!of_node_check_flag(rd->dn, OF_POPULATED))
-			return NOTIFY_OK;	/* already depopulated */
+			return NOTIFY_DONE;	/* already depopulated */
 
 		chip = of_find_gpiochip_by_node(rd->dn->parent);
 		if (chip == NULL)
-			return NOTIFY_OK;	/* not for us */
+			return NOTIFY_DONE;	/* not for us */
 
 		of_gpiochip_remove_hog(chip, rd->dn);
 		of_node_clear_flag(rd->dn, OF_POPULATED);
-		break;
+		return NOTIFY_OK;
 	}
 
-	return NOTIFY_OK;
+	return NOTIFY_DONE;
 }
 
 struct notifier_block gpio_of_notifier = {
-- 
2.39.2