diff options
| author | Boris Brezillon <bbrezillon@kernel.org> | 2020-05-03 17:53:41 +0200 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2020-05-11 09:51:42 +0200 |
| commit | 66aaba3a07cb8e53878bbeabe54660a646b55a34 (patch) | |
| tree | 6643470b3c9aa1ef9733548b5c0bfc1d51d426a8 | |
| parent | mtd: cmdlinepart: Add an slc option to use SLC mode on a part (diff) | |
| download | linux-66aaba3a07cb8e53878bbeabe54660a646b55a34.tar.xz linux-66aaba3a07cb8e53878bbeabe54660a646b55a34.zip | |
ubi: Relax the 'no MLC' rule and allow MLCs operating in SLC mode
The MTD layer provides an SLC mode (purely software emulation of SLC
behavior) addressing the paired-pages corruption issue, which was the
main reason for refusing attaching MLC NANDs to UBI.
Relax this rule and allow partitions that have the
MTD_EMULATE_SLC_ON_MLC flag set to be attached.
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Richard Weinberger <richard@nod.at>
Link: https://lore.kernel.org/linux-mtd/20200503155341.16712-9-miquel.raynal@bootlin.com
| -rw-r--r-- | drivers/mtd/ubi/build.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 12c02342149c..e85b04e9716b 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -867,8 +867,11 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, * Both UBI and UBIFS have been designed for SLC NAND and NOR flashes. * MLC NAND is different and needs special care, otherwise UBI or UBIFS * will die soon and you will lose all your data. + * Relax this rule if the partition we're attaching to operates in SLC + * mode. */ - if (mtd->type == MTD_MLCNANDFLASH) { + if (mtd->type == MTD_MLCNANDFLASH && + !(mtd->flags & MTD_SLC_ON_MLC_EMULATION)) { pr_err("ubi: refuse attaching mtd%d - MLC NAND is not supported\n", mtd->index); return -EINVAL; |