linux-kernel - [PATCH] pinctrl: nuvoton: Add missing fwnode_handle_put in wpcm450_gpio

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Date:   Thu, 21 Apr 2022 05:53:56 +0000
From:   Peng Wu <wupeng58@...wei.com>
To:     <j.neuschaefer@....net>, <linus.walleij@...aro.org>
CC:     <openbmc@...ts.ozlabs.org>, <linux-gpio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <wupeng58@...wei.com>,
        <liwei391@...wei.com>
Subject: [PATCH] pinctrl: nuvoton: Add missing fwnode_handle_put in wpcm450_gpio_register

In one of the error paths of the device_for_each_child_node() loop
in wpcm450_gpio_register, add missing call to fwnode_handle_put.

Signed-off-by: Peng Wu <wupeng58@...wei.com>
---
 drivers/pinctrl/nuvoton/pinctrl-wpcm450.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
index 0dbeb91f0bf2..de4388b512d7 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
@@ -1038,15 +1038,19 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
 			continue;
 
 		ret = fwnode_property_read_u32(child, "reg", &reg);
-		if (ret < 0)
+		if (ret < 0) {
+			fwnode_handle_put(child);
 			return ret;
+		}
 
 		gpio = &pctrl->gpio_bank[reg];
 		gpio->pctrl = pctrl;
 
-		if (reg >= WPCM450_NUM_BANKS)
+		if (reg >= WPCM450_NUM_BANKS) {
+			fwnode_handle_put(child);
 			return dev_err_probe(dev, -EINVAL,
-					     "GPIO index %d out of range!\n", reg);
+					"GPIO index %d out of range!\n", reg);
+		}
 
 		bank = &wpcm450_banks[reg];
 		gpio->bank = bank;
@@ -1060,8 +1064,10 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
 		}
 		ret = bgpio_init(&gpio->gc, dev, 4,
 				 dat, set, NULL, dirout, NULL, flags);
-		if (ret < 0)
+		if (ret < 0) {
+			fwnode_handle_put(child);
 			return dev_err_probe(dev, ret, "GPIO initialization failed\n");
+		}
 
 		gpio->gc.ngpio = bank->length;
 		gpio->gc.set_config = wpcm450_gpio_set_config;
@@ -1074,8 +1080,11 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
 		girq->parent_handler = wpcm450_gpio_irqhandler;
 		girq->parents = devm_kcalloc(dev, WPCM450_NUM_GPIO_IRQS,
 					     sizeof(*girq->parents), GFP_KERNEL);
-		if (!girq->parents)
+		if (!girq->parents) {
+			fwnode_handle_put(child);
 			return -ENOMEM;
+		}
+
 		girq->default_type = IRQ_TYPE_NONE;
 		girq->handler = handle_bad_irq;
 
@@ -1091,8 +1100,10 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
 		}
 
 		ret = devm_gpiochip_add_data(dev, &gpio->gc, gpio);
-		if (ret)
+		if (ret) {
+			fwnode_handle_put(child);
 			return dev_err_probe(dev, ret, "Failed to add GPIO chip\n");
+		}
 	}
 
 	return 0;
-- 
2.17.1