diff mbox

[2/2] backlight: lm3630: potential NULL deref in probe()

Message ID 20130925093612.GR6192@mwanda (mailing list archive)
State New, archived
Headers show

Commit Message

Dan Carpenter Sept. 25, 2013, 9:36 a.m. UTC 
We dereference "pdata" later in the function so we can't leave it as
NULL.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>

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diff mbox

Patch

diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c
index 65392f9..6146481 100644
--- a/drivers/video/backlight/lm3630a_bl.c
+++ b/drivers/video/backlight/lm3630a_bl.c
@@ -389,22 +389,21 @@  static int lm3630a_probe(struct i2c_client *client,
 
 	i2c_set_clientdata(client, pchip);
 	if (pdata == NULL) {
-		pchip->pdata = devm_kzalloc(pchip->dev,
-					    sizeof(struct
-						   lm3630a_platform_data),
-					    GFP_KERNEL);
-		if (pchip->pdata == NULL)
+		pdata = devm_kzalloc(pchip->dev,
+				     sizeof(struct lm3630a_platform_data),
+				     GFP_KERNEL);
+		if (pdata == NULL)
 			return -ENOMEM;
 		/* default values */
-		pchip->pdata->leda_ctrl = LM3630A_LEDA_ENABLE;
-		pchip->pdata->ledb_ctrl = LM3630A_LEDB_ENABLE;
-		pchip->pdata->leda_max_brt = LM3630A_MAX_BRIGHTNESS;
-		pchip->pdata->ledb_max_brt = LM3630A_MAX_BRIGHTNESS;
-		pchip->pdata->leda_init_brt = LM3630A_MAX_BRIGHTNESS;
-		pchip->pdata->ledb_init_brt = LM3630A_MAX_BRIGHTNESS;
-	} else {
-		pchip->pdata = pdata;
+		pdata->leda_ctrl = LM3630A_LEDA_ENABLE;
+		pdata->ledb_ctrl = LM3630A_LEDB_ENABLE;
+		pdata->leda_max_brt = LM3630A_MAX_BRIGHTNESS;
+		pdata->ledb_max_brt = LM3630A_MAX_BRIGHTNESS;
+		pdata->leda_init_brt = LM3630A_MAX_BRIGHTNESS;
+		pdata->ledb_init_brt = LM3630A_MAX_BRIGHTNESS;
 	}
+	pchip->pdata = pdata;
+
 	/* chip initialize */
 	rval = lm3630a_chip_init(pchip);
 	if (rval < 0) {