gen_nand: Test if nr_chips field is valid

commit 01cd2ababddd55a127caa1cd20d570637e0d42e1 upstream.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c
index 90e143e5ad3eb6bef4bc1bd065548237b93fd3f2..317aff428e428e1ce71e190ccece5de01cd49fec 100644 (file)
--- 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)
        struct resource *res;
        int err = 0;
 
+       if (pdata->chip.nr_chips < 1) {
+               dev_err(&pdev->dev, "invalid number of chips specified\n");
+               return -EINVAL;
+       }
+
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res)
                return -ENXIO;