[PATCH 2/8] drivers/block/xen-blkback:Evalue bio->bi_rw after calling bio_alloc() and before calling bio_add_page().

[majianpeng]

Because call bio_alloc, the bi_rw is zero by default,but in
bio_add_page used the bi_rw. So evalue bi_rw.

Signed-off-by: Jianpeng Ma <majianpeng at gmail.com>
---
 drivers/block/xen-blkback/blkback.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index 73f196c..02ca290 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -701,6 +701,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
 			bio->bi_private = pending_req;
 			bio->bi_end_io  = end_block_io_op;
 			bio->bi_sector  = preq.sector_number;
+			bio->bi_rw	= operation;
 		}
 
 		preq.sector_number += seg[i].nsec;
-- 
1.7.9.5