mtd: nand: sunxi: prevent a small memory leak

I moved the sanity check on ecc->size before the allocation so that we
don't leak memory on error.

Fixes: 05af074a4b73 ('mtd: nand: sunxi: check ecc->size values')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

drivers/mtd/nand/sunxi_nand.c

@@ -1814,13 +1814,13 @@ static int sunxi_nand_hw_common_ecc_ctrl_init(struct mtd_info *mtd,
 	int ret;
 	int i;
 
+	if (ecc->size != 512 && ecc->size != 1024)
+		return -EINVAL;
+
 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	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;