@@ -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;
@@ -1206,7 +1203,7 @@ 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;
@@ -1442,12 +1439,8 @@ 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;
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> --- drivers/mtd/devices/docg3.c | 17 +++++------------ 1 files changed, 5 insertions(+), 12 deletions(-)