From 9b96918a974fcd6c9e752cc8b28157f776c601d3 Mon Sep 17 00:00:00 2001 From: Ramax Lo Date: Thu, 14 Jan 2010 10:15:05 +0800 Subject: [PATCH] ARM: S3C: NAND: Check the existence of nr_map before copying Since the structure field nr_map is optional, we need to check whether the chip number map is provided to avoid unexpected NULL pointer exception. Signed-off-by: Ramax Lo Signed-off-by: Ben Dooks --- arch/arm/plat-s3c/dev-nand.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/plat-s3c/dev-nand.c b/arch/arm/plat-s3c/dev-nand.c index 84808ccda70e..a52fb6cf618f 100644 --- a/arch/arm/plat-s3c/dev-nand.c +++ b/arch/arm/plat-s3c/dev-nand.c @@ -58,8 +58,8 @@ static int __init s3c_nand_copy_set(struct s3c2410_nand_set *set) return -ENOMEM; } - size = sizeof(int) * set->nr_chips; - if (size) { + if (set->nr_map && set->nr_chips) { + size = sizeof(int) * set->nr_chips; ptr = kmemdup(set->nr_map, size, GFP_KERNEL); set->nr_map = ptr;