[PATCH] mtd: nand: check nand_mtd_to_devnum() argument

If the "mtd" parameter is NULL, the search will definitely yield a negative result. In that case, it's better to exit immediately.

Signed-off-by: Dario Binacchi dario.binacchi@amarulasolutions.com

---

drivers/mtd/nand/raw/nand.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/nand.c b/drivers/mtd/nand/raw/nand.c index eacd99c4e275..55c00ac815dd 100644 --- a/drivers/mtd/nand/raw/nand.c +++ b/drivers/mtd/nand/raw/nand.c @@ -41,8 +41,11 @@ int nand_mtd_to_devnum(struct mtd_info *mtd) { int i;

+ if (!mtd) + return -ENODEV; + for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) { - if (mtd && get_nand_dev_by_index(i) == mtd) + if (get_nand_dev_by_index(i) == mtd) return i; }