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-rw-r--r--drivers/mtd/nand/nand_base.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index d3b71a5..a2d06be 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1245,7 +1245,8 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
if (unlikely(ops->mode == MTD_OOB_RAW))
ret = chip->ecc.read_page_raw(mtd, chip,
bufpoi, page);
- else if (!aligned && NAND_SUBPAGE_READ(chip) && !oob)
+ else if (!aligned && NAND_HAS_SUBPAGE_READ(chip) &&
+ !oob)
ret = chip->ecc.read_subpage(mtd, chip,
col, bytes, bufpoi);
else
@@ -1256,7 +1257,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
/* Transfer not aligned data */
if (!aligned) {
- if (!NAND_SUBPAGE_READ(chip) && !oob &&
+ if (!NAND_HAS_SUBPAGE_READ(chip) && !oob &&
!(mtd->ecc_stats.failed - stats.failed))
chip->pagebuf = realpage;
memcpy(buf, chip->buffers->databuf + col, bytes);
@@ -3150,6 +3151,10 @@ int nand_scan_tail(struct mtd_info *mtd)
/* Invalidate the pagebuffer reference */
chip->pagebuf = -1;
+ /* Large page NAND with SOFT_ECC should support subpage reads */
+ if ((chip->ecc.mode == NAND_ECC_SOFT) && (chip->page_shift > 9))
+ chip->options |= NAND_SUBPAGE_READ;
+
/* Fill in remaining MTD driver data */
mtd->type = MTD_NANDFLASH;
mtd->flags = (chip->options & NAND_ROM) ? MTD_CAP_ROM :