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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>
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@ -58,8 +58,8 @@ static int __init s3c_nand_copy_set(struct s3c2410_nand_set *set)
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return -ENOMEM;
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}
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size = sizeof(int) * set->nr_chips;
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if (size) {
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if (set->nr_map && set->nr_chips) {
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size = sizeof(int) * set->nr_chips;
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ptr = kmemdup(set->nr_map, size, GFP_KERNEL);
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set->nr_map = ptr;
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