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mtd: nand: sunxi: check ecc->size values

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Verify that the ecc->size value is either 512 or 1024 bytes.
This should always be the case if this field was assigned to the
nand->ecc_step_size_ds value, but can be wrong when the user overloaded
this value with the nand-ecc-step-size DT property.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Boris Brezillon 2016-06-06 13:59:13 +02:00
parent 872164e41f
commit a92c721dc6
1 changed files with 3 additions and 0 deletions
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3
drivers/mtd/nand/sunxi_nand.c
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@ -1786,6 +1786,9 @@ static int sunxi_nand_hw_common_ecc_ctrl_init(struct mtd_info *mtd,
if (!data)
return -ENOMEM;
if (ecc->size != 512 && ecc->size != 1024)
return -EINVAL;
/* Prefer 1k ECC chunk over 512 ones */
if (ecc->size == 512 && mtd->writesize > 512) {
ecc->size = 1024;