[PATCH 1/3] mtd: rawnand: sunxi: propagate user-data allocation errors

[James Hilliard <james.hilliard1@gmail.com>]

sunxi_nfc_maximize_user_data() returns -ENOMEM when its per-step
length array cannot be allocated, but the caller ignores that error.
The NULL array then makes sunxi_nfc_user_data_sz() report the fixed
four-byte fallback, which is not the layout that the variable-length
setup calculated.

Return the setup error so an allocation failure cannot silently select
and validate a different OOB layout.

Fixes: 54dcd6aa69db ("mtd: rawnand: sunxi: introduce maximize variable user data length")
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 45ccbce91551..108161fe10cb 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -2072,6 +2072,7 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
 	int total_user_data_sz = 0;
 	int nsectors;
 	int ecc_mode;
+	int ret;
 	int i;
 
 	if (nanddev->ecc.user_conf.flags & NAND_ECC_MAXIMIZE_STRENGTH) {
@@ -2169,9 +2170,12 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
 	 * The rationale for variable data length is to prioritize maximum ECC
 	 * strength, and then use the remaining space for user data.
 	 */
-	if (nfc->caps->reg_user_data_len)
-		sunxi_nfc_maximize_user_data(nand, mtd->oobsize, ecc->bytes,
-					     nsectors);
+	if (nfc->caps->reg_user_data_len) {
+		ret = sunxi_nfc_maximize_user_data(nand, mtd->oobsize,
+						   ecc->bytes, nsectors);
+		if (ret)
+			return ret;
+	}
 
 	if (total_user_data_sz == 0)
 		for (i = 0; i < nsectors; i++)

-- 
2.53.0