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-rw-r--r--drivers/md/dm-raid.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index a002dd8..86df8b2 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -449,7 +449,7 @@ static int parse_raid_params(struct raid_set *rs, char **argv,
rs->ti->error = "write_mostly option is only valid for RAID1";
return -EINVAL;
}
- if (value > rs->md.raid_disks) {
+ if (value >= rs->md.raid_disks) {
rs->ti->error = "Invalid write_mostly drive index given";
return -EINVAL;
}

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