linux-kernel - [PATCH 2/2] regulator: s5m8767: Prevent possible NULL pointer dereference

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Date:	Wed, 13 Feb 2013 09:31:31 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	Sangbeom Kim <sbkim73@...sung.com>,
	LiamGirdwood <lgirdwood@...il.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] regulator: s5m8767: Prevent possible NULL pointer
 dereference

s5m8767_pmic_dt_parse_pdata dereferenes pdata, thus check pdata earlier to
avoid NULL pointer dereference.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/s5m8767.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index ef0532d..8a83194 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -659,17 +659,17 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 	struct s5m8767_info *s5m8767;
 	int i, ret, size, buck_init;
 
+	if (!pdata) {
+		dev_err(pdev->dev.parent, "Platform data not supplied\n");
+		return -ENODEV;
+	}
+
 	if (iodev->dev->of_node) {
 		ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
 		if (ret)
 			return ret;
 	}
 
-	if (!pdata) {
-		dev_err(pdev->dev.parent, "Platform data not supplied\n");
-		return -ENODEV;
-	}
-
 	if (pdata->buck2_gpiodvs) {
 		if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 			dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
-- 
1.7.9.5



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