bcache: Set ra_pages based on backing device's ra_pages

Signed-off-by: Kent Overstreet <koverstreet@google.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index f1e69f2fad37..6817ea46cf0a 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1067,6 +1067,10 @@ static const char *register_bdev(struct cache_sb *sb, struct page *sb_page,
 
         set_capacity(g, dc->bdev->bd_part->nr_sects - dc->sb.data_offset);
 
+        g->queue->backing_dev_info.ra_pages =
+                max(g->queue->backing_dev_info.ra_pages,
+                    bdev->bd_queue->backing_dev_info.ra_pages);
+
         bch_cached_dev_request_init(dc);
 
         err = "error creating kobject";