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| author | Robert Jarzmik <robert.jarzmik@free.fr> | 2012-03-22 21:00:50 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-03-27 01:03:00 +0100 |
| commit | a7baef1211b0ac218299965481e7cff9d68c1edd (patch) | |
| tree | d9737628c725cb983dfebf9958c3093c4f66573d /drivers/mtd | |
| parent | a78da28776496d3a850ce741d3474b65057e156b (diff) | |
| download | linux-a7baef1211b0ac218299965481e7cff9d68c1edd.tar.gz linux-a7baef1211b0ac218299965481e7cff9d68c1edd.tar.bz2 linux-a7baef1211b0ac218299965481e7cff9d68c1edd.zip | |
mtd: docg3 fix inbound calculations
The last erase block was not accessible, as the out of bound
check was incorrectly rejecting the last block.
The read/write/erase offset checks were forbidding the usage of the
last block, because of the calculation which was considering the
byte after the last instead of the last byte.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/devices/docg3.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c index f5930caa38e7..62e01113c317 100644 --- a/drivers/mtd/devices/docg3.c +++ b/drivers/mtd/devices/docg3.c @@ -872,11 +872,8 @@ static int doc_read_oob(struct mtd_info *mtd, loff_t from, if (ooblen % DOC_LAYOUT_OOB_SIZE) return -EINVAL; - ret = -EINVAL; - calc_block_sector(from + len, &block0, &block1, &page, &ofs, - docg3->reliable); - if (block1 > docg3->max_block) - goto err; + if (from + len > mtd->size) + return -EINVAL; ops->oobretlen = 0; ops->retlen = 0; @@ -1207,7 +1204,7 @@ static int doc_erase(struct mtd_info *mtd, struct erase_info *info) calc_block_sector(info->addr + info->len, &block0, &block1, &page, &ofs, docg3->reliable); ret = -EINVAL; - if (block1 > docg3->max_block || page || ofs) + if (info->addr + info->len > mtd->size || page || ofs) goto reset_err; ret = 0; @@ -1443,12 +1440,8 @@ static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, if (len && ooblen && (len / DOC_LAYOUT_PAGE_SIZE) != (ooblen / oobdelta)) return -EINVAL; - - ret = -EINVAL; - calc_block_sector(ofs + len, &block0, &block1, &page, &pofs, - docg3->reliable); - if (block1 > docg3->max_block) - goto err; + if (ofs + len > mtd->size) + return -EINVAL; ops->oobretlen = 0; ops->retlen = 0; |