From: John Crispin <blogic@openwrt.org>
Date: Sun, 22 Jul 2012 06:59:57 +0000 (+0200)
Subject: mtd: check for valid pdata inside plat_nand
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=da3888cb84065a03d30b5f729b405e573bd0d66e;p=deliverable%2Flinux.git

mtd: check for valid pdata inside plat_nand

If plat_nand loads and the platform_data is not properly set it will segfault.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c
index 1bcb52040422..a47ee68a0cfa 100644
--- a/drivers/mtd/nand/plat_nand.c
+++ b/drivers/mtd/nand/plat_nand.c
@@ -37,6 +37,11 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
 	const char **part_types;
 	int err = 0;
 
+	if (!pdata) {
+		dev_err(&pdev->dev, "platform_nand_data is missing\n");
+		return -EINVAL;
+	}
+
 	if (pdata->chip.nr_chips < 1) {
 		dev_err(&pdev->dev, "invalid number of chips specified\n");
 		return -EINVAL;