[PATCH 5.4 242/261] mtd: rawnand: brcmnand: fix hamming oob layout

From: Greg Kroah-Hartman
Date: Fri Jun 19 2020 - 11:53:08 EST


From: Ãlvaro FernÃndez Rojas <noltari@xxxxxxxxx>

commit 130bbde4809b011faf64f99dddc14b4b01f440c3 upstream.

First 2 bytes are used in large-page nand.

Fixes: ef5eeea6e911 ("mtd: nand: brcm: switch to mtd_ooblayout_ops")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Ãlvaro FernÃndez Rojas <noltari@xxxxxxxxx>
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20200512075733.745374-2-noltari@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/mtd/nand/raw/brcmnand/brcmnand.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)

--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -1019,11 +1019,14 @@ static int brcmnand_hamming_ooblayout_fr
if (!section) {
/*
* Small-page NAND use byte 6 for BBI while large-page
- * NAND use byte 0.
+ * NAND use bytes 0 and 1.
*/
- if (cfg->page_size > 512)
- oobregion->offset++;
- oobregion->length--;
+ if (cfg->page_size > 512) {
+ oobregion->offset += 2;
+ oobregion->length -= 2;
+ } else {
+ oobregion->length--;
+ }
}
}