[PATCH v3 04/15] mtd: rawnand: sunxi: select the pattern ID for the current ECC step

[James Hilliard]

The pattern ID register has one bit per hardware ECC step, distinguishing
all-zero from all-ones data. The correction helper checks the current
step's pattern-found bit but always reads pattern ID bit zero.

PIO reuses hardware step zero, so this works there. DMA processes several
steps at once: a later all-ones step can be filled with zeros and reported
as a successful read if pattern ID bit zero is clear. Conversely, a later
all-zero step can be treated as erased when bit zero is set.

Use the current hardware step's pattern ID bit, matching the error and
pattern-found bits already checked by the helper.

Fixes: 614049a8d904 ("mtd: nand: sunxi: add support for DMA assisted operations")
Signed-off-by: James Hilliard <james.hilliard1@xxxxxxxxx>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index af8ba2d9f7a0..1bc94565e9e8 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1105,7 +1105,7 @@ static int sunxi_nfc_hw_ecc_correct(struct nand_chip *nand, u8 *data, u8 *oob,
 	if (pattern_found & BIT(step)) {
 		u8 pattern;
 
-		if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID(nfc)) & 0x1))) {
+		if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID(nfc)) & BIT(step)))) {
 			pattern = 0x0;
 		} else {
 			pattern = 0xff;

-- 
2.53.0