[PATCH] rbd: drop original request earlier for existence check

[Alex Elder <elder@inktank.com>]

The reference to the original request dropped at the end of
rbd_img_obj_exists_callback() corresponds to the reference taken
in rbd_img_obj_exists_submit() to account for the stat request
referring to it.  Move the put of that reference up right after
clearing that pointer to make its purpose more obvious.

Signed-off-by: Alex Elder <elder@inktank.com>
---
 drivers/block/rbd.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 632dd35..b2f5c96 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2528,6 +2528,7 @@ static void rbd_img_obj_exists_callback(struct
rbd_obj_request *obj_request)
 	 */
 	orig_request = obj_request->obj_request;
 	obj_request->obj_request = NULL;
+	rbd_obj_request_put(orig_request);
 	rbd_assert(orig_request);
 	rbd_assert(orig_request->img_request);

@@ -2548,7 +2549,6 @@ static void rbd_img_obj_exists_callback(struct
rbd_obj_request *obj_request)
 	if (!rbd_dev->parent_overlap) {
 		struct ceph_osd_client *osdc;

-		rbd_obj_request_put(orig_request);
 		osdc = &rbd_dev->rbd_client->client->osdc;
 		result = rbd_obj_request_submit(osdc, orig_request);
 		if (!result)
@@ -2578,7 +2578,6 @@ static void rbd_img_obj_exists_callback(struct
rbd_obj_request *obj_request)
 out:
 	if (orig_request->result)
 		rbd_obj_request_complete(orig_request);
-	rbd_obj_request_put(orig_request);
 }

 static int rbd_img_obj_exists_submit(struct rbd_obj_request *obj_request)
-- 
1.7.9.5