[PATCH 1/2] md/raid5:Change the order of md_write_start() and chunk_aligned_read() in function make_request().

[majianpeng <majianpeng@xxxxxxxxx>]

If exec chunk_aligned_read(),it did not neccessary to exec
md_write_start().

Signed-off-by: majianpeng <majianpeng@xxxxxxxxx>
---
 drivers/md/raid5.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index d267672..5653125 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3978,13 +3978,13 @@ static void make_request(struct mddev *mddev, struct bio * bi)
 		return;
 	}
 
-	md_write_start(mddev, bi);
-
 	if (rw == READ &&
 	     mddev->reshape_position == MaxSector &&
 	     chunk_aligned_read(mddev,bi))
 		return;
 
+	md_write_start(mddev, bi);
+
 	logical_sector = bi->bi_sector & ~((sector_t)STRIPE_SECTORS-1);
 	last_sector = bi->bi_sector + (bi->bi_size>>9);
 	bi->bi_next = NULL;
-- 
1.7.5.4



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