xfs: bail out of scrub immediately if scan incomplete

If a scrubber cannot complete its check and signals an incomplete check,
we must bail out immediately without updating health status, trying a
repair, etc. because our scan is incomplete and we therefore do not know
much more.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/scrub/scrub.c

@@ -517,7 +517,7 @@ xfs_scrub_metadata(
 			goto out;
 		sc.flags |= XCHK_TRY_HARDER;
 		goto retry_op;
-	} else if (error)
+	} else if (error || (sm->sm_flags & XFS_SCRUB_OFLAG_INCOMPLETE))
 		goto out_teardown;
 
 	xchk_update_health(&sc);