diff options
| -rw-r--r-- | drivers/md/dm-integrity.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c index 6977422454a4..3b54b7f8c9b9 100644 --- a/drivers/md/dm-integrity.c +++ b/drivers/md/dm-integrity.c @@ -1429,8 +1429,10 @@ static int dm_integrity_rw_tag(struct dm_integrity_c *ic, unsigned char *tag, se if (op == TAG_READ) { memcpy(tag, dp, to_copy); } else if (op == TAG_WRITE) { - memcpy(dp, tag, to_copy); - dm_bufio_mark_partial_buffer_dirty(b, *metadata_offset, *metadata_offset + to_copy); + if (memcmp(dp, tag, to_copy)) { + memcpy(dp, tag, to_copy); + dm_bufio_mark_partial_buffer_dirty(b, *metadata_offset, *metadata_offset + to_copy); + } } else { /* e.g.: op == TAG_CMP */ |