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| author |   Miquel Raynal <miquel.raynal@free-electrons.com> | 2018-01-12 10:13:36 +0100 |
|---|---|---|
| committer |   Boris Brezillon <boris.brezillon@free-electrons.com> | 2018-01-12 10:30:48 +0100 |
| commit | 87e89ce8d0d14f573c068c61bec2117751fb5103 (patch) | |
| tree | b3a8854bf8bd9ae415dec53219c00852998641c6 /drivers/mtd/nand/nand_base.c | |
| parent | mtd: mtd_oobtest: Handle bitflips during reads (diff) | |
| download | linux-dev-87e89ce8d0d14f573c068c61bec2117751fb5103.tar.xz linux-dev-87e89ce8d0d14f573c068c61bec2117751fb5103.zip | |
mtd: nand: Fix nand_do_read_oob() return value
Starting from commit 041e4575f034 ("mtd: nand: handle ECC errors in
OOB"), nand_do_read_oob() (from the NAND core) did return 0 or a
negative error, and the MTD layer expected it.
However, the trend for the NAND layer is now to return an error or a
positive number of bitflips. Deciding which status to return to the user
belongs to the MTD layer.
Commit e47f68587b82 ("mtd: check for max_bitflips in mtd_read_oob()")
brought this logic to the mtd_read_oob() function while the return value
coming from nand_do_read_oob() (called by the ->_read_oob() hook) was
left unchanged.
Fixes: e47f68587b82 ("mtd: check for max_bitflips in mtd_read_oob()")
Cc: stable@vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 96c97588e1ba..3ff77bef9739 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3797,6 +3797,7 @@ EXPORT_SYMBOL(nand_write_oob_syndrome); static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { + unsigned int max_bitflips = 0; int page, realpage, chipnr; struct nand_chip *chip = mtd_to_nand(mtd); struct mtd_ecc_stats stats; @@ -3854,6 +3855,8 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, nand_wait_ready(mtd); } + max_bitflips = max_t(unsigned int, max_bitflips, ret); + readlen -= len; if (!readlen) break; @@ -3879,7 +3882,7 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, if (mtd->ecc_stats.failed - stats.failed) return -EBADMSG; - return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; + return max_bitflips; } /** |