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From:   Yang Yingliang <yangyingliang@huawei.com>
To:     <linux-kernel@vger.kernel.org>, <linux-leds@vger.kernel.org>
CC:     <pavel@ucw.cz>
Subject: [PATCH -next] leds: tlc591xx: fix return value check in tlc591xx_probe()
Date:   Tue, 6 Apr 2021 21:11:59 +0800
Message-ID: <20210406131159.2136509-1-yangyingliang@huawei.com>
MIME-Version: 1.0
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Precedence: bulk

After device_get_match_data(), tlc591xx is not checked, add
check for it and also check np after dev_of_node.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/leds/leds-tlc591xx.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/leds/leds-tlc591xx.c b/drivers/leds/leds-tlc591xx.c
index 5b9dfdf743ec..cb7bd1353f9f 100644
--- a/drivers/leds/leds-tlc591xx.c
+++ b/drivers/leds/leds-tlc591xx.c
@@ -148,16 +148,20 @@ static int
 tlc591xx_probe(struct i2c_client *client,
 	       const struct i2c_device_id *id)
 {
-	struct device_node *np = dev_of_node(&client->dev), *child;
+	struct device_node *np, *child;
 	struct device *dev = &client->dev;
 	const struct tlc591xx *tlc591xx;
 	struct tlc591xx_priv *priv;
 	int err, count, reg;
 
-	tlc591xx = device_get_match_data(dev);
+	np = dev_of_node(dev);
 	if (!np)
 		return -ENODEV;
 
+	tlc591xx = device_get_match_data(dev);
+	if (!tlc591xx)
+		return -ENODEV;
+
 	count = of_get_available_child_count(np);
 	if (!count || count > tlc591xx->max_leds)
 		return -EINVAL;
-- 
2.25.1