commit 7202082b7b7a256d04ec96131c7f859df0a79f64
author Li Nan <linan122@huawei.com> Thu Sep 04 15:34:52 2025 +0800
committer Yu Kuai <yukuai3@huawei.com> Fri Sep 05 00:31:18 2025 +0800
tree 5463f1f0152474ef1870ffb07af472f363a8c641
parent 93dec51e716db88f32d770dc9ab268964fff320b

md: prevent incorrect update of resync/recovery offset

In md_do_sync(), when md_sync_action returns ACTION_FROZEN, subsequent
call to md_sync_position() will return MaxSector. This causes
'curr_resync' (and later 'recovery_offset') to be set to MaxSector too,
which incorrectly signals that recovery/resync has completed, even though
disk data has not actually been updated.

To fix this issue, skip updating any offset values when the sync action
is FROZEN. The same holds true for IDLE.

Fixes: 7d9f107a4e94 ("md: use new helpers in md_do_sync()")
Signed-off-by: Li Nan <linan122@huawei.com>
Link: https://lore.kernel.org/linux-raid/20250904073452.3408516-1-linan666@huaweicloud.com
Signed-off-by: Yu Kuai <yukuai3@huawei.com>