From: Axel Lin <axel.lin@gmail.com>
Date: Wed, 20 Jun 2012 08:13:15 +0000 (+0800)
Subject: regulator: lp872x: Return -EINVAL if pdata is NULL
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=baf73e2c4e25aa57a7bd5df90a93e65be0542c74;p=deliverable%2Flinux.git

regulator: lp872x: Return -EINVAL if pdata is NULL

Return -EINVAL if pdata is NULL, otherwise we have NULL dereference bug.
This patch also moves the code checking pdata earlier in lp872x_probe.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/drivers/regulator/lp872x.c b/drivers/regulator/lp872x.c
index d51d09852041..e8f54efb1985 100644
--- a/drivers/regulator/lp872x.c
+++ b/drivers/regulator/lp872x.c
@@ -785,11 +785,6 @@ static int lp872x_config(struct lp872x *lp)
 	struct lp872x_platform_data *pdata = lp->pdata;
 	int ret;
 
-	if (!pdata) {
-		dev_warn(lp->dev, "no platform data\n");
-		return 0;
-	}
-
 	if (!pdata->update_config)
 		return 0;
 
@@ -889,6 +884,11 @@ static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 		[LP8725] = LP8725_NUM_REGULATORS,
 	};
 
+	if (!pdata) {
+		dev_warn(&cl->dev, "no platform data\n");
+		return -EINVAL;
+	}
+
 	lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL);
 	if (!lp)
 		goto err_mem;