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-rw-r--r--drivers/md/md.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 27506302eb7a..dd59d71ade2f 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3834,7 +3834,7 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len)
err = -EBUSY;
}
spin_unlock(&mddev->lock);
- return err;
+ return err ?: len;
}
err = mddev_lock(mddev);
if (err)