linux-kernel - [PATCH v1] drivers/i2c/muxes:Fix resource leaks in device_for_each_child

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Date:   Wed, 14 Jun 2023 19:28:50 +0800
From:   Wang Ming <machel@...o.com>
To:     Peter Korsgaard <peter.korsgaard@...co.com>,
        Peter Rosin <peda@...ntia.se>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Wang Ming <machel@...o.com>
Subject: [PATCH v1] drivers/i2c/muxes:Fix resource leaks in device_for_each_child_node() loops

The device_for_each_child_node loop in i2c-mux-gpio should
have fwnode_handle_put() before return which could avoid
resource leaks.This patch could fix this bug.

Signed-off-by: Wang Ming <machel@...o.com>
---
 drivers/i2c/muxes/i2c-mux-gpio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c
index 5d5cbe013..90966de7a 100644
--- a/drivers/i2c/muxes/i2c-mux-gpio.c
+++ b/drivers/i2c/muxes/i2c-mux-gpio.c
@@ -106,6 +106,7 @@ static int i2c_mux_gpio_probe_fw(struct gpiomux *mux,
                } else if (is_acpi_node(child)) {
                        rc = acpi_get_local_address(ACPI_HANDLE_FWNODE(child), values + i);
                        if (rc)
+                               fwnode_handle_put(child);
                                return dev_err_probe(dev, rc, "Cannot get address\n");
                }

--
2.25.1

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