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 <ramaxlo@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s3c/dev-nand.c b/arch/arm/plat-s3c/dev-nand.c
index 84808cc..a52fb6c 100644
--- a/arch/arm/plat-s3c/dev-nand.c
+++ b/arch/arm/plat-s3c/dev-nand.c
@@ -58,8 +58,8 @@
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;
