mtd: nand: sunxi: check ecc->size values
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>
diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
index bb440b9..6e319ba 100644
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -1786,6 +1786,9 @@
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;