diff options
| author | Stefan Agner <stefan.agner@toradex.com> | 2016-10-26 17:18:44 -0700 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2017-01-11 15:42:35 +0100 |
| commit | ff58aaf0bb23129c81099c3b2ea89954022bf6cf (patch) | |
| tree | 4f250906adccf156bf1cbeb0389deaa20f2c51a1 /drivers | |
| parent | e2ee1afc28a13a0894fd2db0a5ae7a2262fdd1c0 (diff) | |
nand: force BBT scan for controllers which need it
Commit 35c204d8a9d0 ("nand: reinstate lazy bad block scanning")
introduced lazy BBT scanning. However, some controller do parts
of the initialization (mxs_nand.c) during scan_bbt, hence for
those controllers the BBT must be scanned at initialization time.
In most situation the U-Boot environment gets read first, and
the U-Boot environment code checks for bad blocks first. Checking
for bad blocks will ask for scan_bbt before reading the first page,
hence in most situation the issue does not appear in practice.
However, when there is no environment configured, other code might
access NAND first which does not explicitly checks for bad blocks,
in those cases ECC reads will fail always.
Cc: Rostislav Lisovy <lisovy@gmail.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/mxs_nand.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c index 92005448d2..d3c420afde 100644 --- a/drivers/mtd/nand/mxs_nand.c +++ b/drivers/mtd/nand/mxs_nand.c @@ -1181,7 +1181,7 @@ int board_nand_init(struct nand_chip *nand) memset(&fake_ecc_layout, 0, sizeof(fake_ecc_layout)); nand_set_controller_data(nand, nand_info); - nand->options |= NAND_NO_SUBPAGE_WRITE; + nand->options |= NAND_NO_SUBPAGE_WRITE | NAND_NEED_BBTSCAN; nand->cmd_ctrl = mxs_nand_cmd_ctrl; diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index d9e5fc95f5..9d1ab57e20 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -4216,6 +4216,11 @@ int nand_scan_tail(struct mtd_info *mtd) if (!mtd->bitflip_threshold) mtd->bitflip_threshold = DIV_ROUND_UP(mtd->ecc_strength * 3, 4); + if (chip->options & NAND_NEED_BBTSCAN) { + chip->options |= NAND_BBT_SCANNED; + return chip->scan_bbt(mtd); + } + return 0; } EXPORT_SYMBOL(nand_scan_tail); |