summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorHaotian Zhang <vulab@iscas.ac.cn>2025-10-28 11:05:09 +0800
committerLinus Walleij <linus.walleij@linaro.org>2025-11-10 00:01:22 +0100
commit9b07cdf86a0b90556f5b68a6b20b35833b558df3 (patch)
treef64a88e96759dfb422a9b8267c448b5c9d1a1966
parent316e361b5d2cdeb8d778983794a1c6eadcb26814 (diff)
pinctrl: cirrus: Fix fwnode leak in cs42l43_pin_probe()
The driver calls fwnode_get_named_child_node() which takes a reference on the child node, but never releases it, which causes a reference leak. Fix by using devm_add_action_or_reset() to automatically release the reference when the device is removed. Fixes: d5282a539297 ("pinctrl: cs42l43: Add support for the cs42l43") Suggested-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
-rw-r--r--drivers/pinctrl/cirrus/pinctrl-cs42l43.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/pinctrl/cirrus/pinctrl-cs42l43.c b/drivers/pinctrl/cirrus/pinctrl-cs42l43.c
index 68abb6d6cecd..a8f82104a384 100644
--- a/drivers/pinctrl/cirrus/pinctrl-cs42l43.c
+++ b/drivers/pinctrl/cirrus/pinctrl-cs42l43.c
@@ -532,6 +532,11 @@ static int cs42l43_gpio_add_pin_ranges(struct gpio_chip *chip)
return ret;
}
+static void cs42l43_fwnode_put(void *data)
+{
+ fwnode_handle_put(data);
+}
+
static int cs42l43_pin_probe(struct platform_device *pdev)
{
struct cs42l43 *cs42l43 = dev_get_drvdata(pdev->dev.parent);
@@ -563,10 +568,20 @@ static int cs42l43_pin_probe(struct platform_device *pdev)
priv->gpio_chip.ngpio = CS42L43_NUM_GPIOS;
if (is_of_node(fwnode)) {
- fwnode = fwnode_get_named_child_node(fwnode, "pinctrl");
-
- if (fwnode && !fwnode->dev)
- fwnode->dev = priv->dev;
+ struct fwnode_handle *child;
+
+ child = fwnode_get_named_child_node(fwnode, "pinctrl");
+ if (child) {
+ ret = devm_add_action_or_reset(&pdev->dev,
+ cs42l43_fwnode_put, child);
+ if (ret) {
+ fwnode_handle_put(child);
+ return ret;
+ }
+ if (!child->dev)
+ child->dev = priv->dev;
+ fwnode = child;
+ }
}
priv->gpio_chip.fwnode = fwnode;