diff options
| -rw-r--r-- | drivers/md/md-bitmap.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c index 1f3339961159..6f9ff14971f9 100644 --- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -2546,6 +2546,10 @@ backlog_store(struct mddev *mddev, const char *buf, size_t len) if (backlog > COUNTER_MAX) return -EINVAL; + rv = mddev_lock(mddev); + if (rv) + return rv; + /* * Without write mostly device, it doesn't make sense to set * backlog for max_write_behind. @@ -2559,6 +2563,7 @@ backlog_store(struct mddev *mddev, const char *buf, size_t len) if (!has_write_mostly) { pr_warn_ratelimited("%s: can't set backlog, no write mostly device available\n", mdname(mddev)); + mddev_unlock(mddev); return -EINVAL; } @@ -2574,6 +2579,8 @@ backlog_store(struct mddev *mddev, const char *buf, size_t len) } if (old_mwb != backlog) md_bitmap_update_sb(mddev->bitmap); + + mddev_unlock(mddev); return len; } |