linux-kernel - [PATCH v2] gpio: mockup: remove gpio debugfs when remove device

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Date:   Mon, 22 Aug 2022 04:10:25 +0000
From:   Wei Yongjun <weiyongjun1@...wei.com>
To:     Bamvor Jian Zhang <bamv2005@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
CC:     Wei Yongjun <weiyongjun1@...wei.com>, <linux-gpio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] gpio: mockup: remove gpio debugfs when remove device

GPIO mockup debugfs is created in gpio_mockup_probe() but
forgot to remove when remove device. This patch add a devm
managed callback for removing them.

Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
v1 -> v2: return from devm_add_xx directly as Bartosz's suggestion
---
 drivers/gpio/gpio-mockup.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
index 8943cea92764..a2e505a7545c 100644
--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -373,6 +373,13 @@ static void gpio_mockup_debugfs_setup(struct device *dev,
 	}
 }
 
+static void gpio_mockup_debugfs_cleanup(void *data)
+{
+	struct gpio_mockup_chip *chip = data;
+
+	debugfs_remove_recursive(chip->dbg_dir);
+}
+
 static void gpio_mockup_dispose_mappings(void *data)
 {
 	struct gpio_mockup_chip *chip = data;
@@ -455,7 +462,7 @@ static int gpio_mockup_probe(struct platform_device *pdev)
 
 	gpio_mockup_debugfs_setup(dev, chip);
 
-	return 0;
+	return devm_add_action_or_reset(dev, gpio_mockup_debugfs_cleanup, chip);
 }
 
 static const struct of_device_id gpio_mockup_of_match[] = {
-- 
2.34.1