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ARM: S3C: NAND: Check the existence of nr_map before copying

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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>
This commit is contained in:
Ramax Lo 2010-01-14 10:15:05 +08:00 committed by Ben Dooks
parent 004b350632
commit 9b96918a97
1 changed files with 2 additions and 2 deletions
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4
arch/arm/plat-s3c/dev-nand.c
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@ -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;