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>

1 files changed, 5 insertions, 0 deletions

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;