Move the defaults to where we do the init of the backing_dev_info.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
 
        q->backing_dev_info.unplug_io_fn = blk_backing_dev_unplug;
        q->backing_dev_info.unplug_io_data = q;
+       q->backing_dev_info.ra_pages =
+                       (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
+       q->backing_dev_info.state = 0;
+       q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
+
        err = bdi_init(&q->backing_dev_info);
        if (err) {
                kmem_cache_free(blk_requestq_cachep, q);
 
        blk_queue_max_segment_size(q, MAX_SEGMENT_SIZE);
 
        q->make_request_fn = mfn;
-       q->backing_dev_info.ra_pages =
-                       (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
-       q->backing_dev_info.state = 0;
-       q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
        blk_queue_max_sectors(q, SAFE_MAX_SECTORS);
        blk_queue_logical_block_size(q, 512);
        blk_queue_dma_alignment(q, 511);