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| author | Doyle, Patrick <pdoyle@irobot.com> | 2021-04-06 10:47:08 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 09:04:33 +0100 |
| commit | 1550a97e4a5d8bf29071bd6c17355ca173e90f73 (patch) | |
| tree | 5ab6a75942abe00055c8ec8895cbb34ee7d53641 | |
| parent | 0f604bfdb56457c903005eb4e2a6d69c8b87811e (diff) | |
| download | linux-stable-1550a97e4a5d8bf29071bd6c17355ca173e90f73.tar.gz linux-stable-1550a97e4a5d8bf29071bd6c17355ca173e90f73.tar.bz2 linux-stable-1550a97e4a5d8bf29071bd6c17355ca173e90f73.zip | |
mtd: nand: bbt: Fix corner case in bad block table handling
commit fd0d8d85f7230052e638a56d1bfea170c488e6bc upstream.
In the unlikely event that both blocks 10 and 11 are marked as bad (on a
32 bit machine), then the process of marking block 10 as bad stomps on
cached entry for block 11. There are (of course) other examples.
Signed-off-by: Patrick Doyle <pdoyle@irobot.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Yoshio Furuyama <ytc-mb-yfuruyama7@kioxia.com>
[<miquel.raynal@bootlin.com>: Fixed the title]
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/linux-mtd/774a92693f311e7de01e5935e720a179fb1b2468.1616635406.git.ytc-mb-yfuruyama7@kioxia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/mtd/nand/bbt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/nand/bbt.c b/drivers/mtd/nand/bbt.c index 044adf913854..64af6898131d 100644 --- a/drivers/mtd/nand/bbt.c +++ b/drivers/mtd/nand/bbt.c @@ -123,7 +123,7 @@ int nanddev_bbt_set_block_status(struct nand_device *nand, unsigned int entry, unsigned int rbits = bits_per_block + offs - BITS_PER_LONG; pos[1] &= ~GENMASK(rbits - 1, 0); - pos[1] |= val >> rbits; + pos[1] |= val >> (bits_per_block - rbits); } return 0; |