diff options
| -rw-r--r-- | lib/libmtd.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/lib/libmtd.c b/lib/libmtd.c index e0c0934..418ba29 100644 --- a/lib/libmtd.c +++ b/lib/libmtd.c @@ -1079,7 +1079,7 @@ int do_oob_op(libmtd_t desc, const struct mtd_dev_info *mtd, int fd, uint64_t start, uint64_t length, void *data, unsigned int cmd64, unsigned int cmd) { - int ret; + int ret, oob_offs; struct mtd_oob_buf64 oob64; struct mtd_oob_buf oob; unsigned long long max_offs; @@ -1102,10 +1102,13 @@ int do_oob_op(libmtd_t desc, const struct mtd_dev_info *mtd, int fd, errno = EINVAL; return -1; } - if (start % mtd->min_io_size) { - errmsg("unaligned address %llu, mtd%d page size is %d", - (unsigned long long)start, mtd->mtd_num, - mtd->min_io_size); + + oob_offs = start & (mtd->min_io_size - 1); + if (oob_offs + length > mtd->oob_size || length == 0) { + errmsg("Cannot write %llu OOB bytes to address %llu " + "(OOB offset %u) - mtd%d OOB size is only %d bytes", + (unsigned long long)length, (unsigned long long)start, + oob_offs, mtd->mtd_num, mtd->oob_size); errno = EINVAL; return -1; } |