[PATCH 1/5] rbd: fix an incorrect assertion condition

[Alex Elder <elder@inktank.com>]

In rbd_img_obj_parent_read_full_callback() there is an assertion
intended to verify the size of the image request for a full parent
read was the size of the original request's target object.  But
assertion was looking at the parent image order rather than the
original one, and these values can differ.

Fix that.

This resolves:
    http://tracker.ceph.com/issues/4938

Signed-off-by: Alex Elder <elder@inktank.com>
---
 drivers/block/rbd.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 0d874a5..15ac2a5 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2186,13 +2186,13 @@ rbd_img_obj_parent_read_full_callback(struct
rbd_img_request *img_request)
 	result = img_request->result;
 	obj_size = img_request->length;
 	xferred = img_request->xferred;
+	rbd_img_request_put(img_request);

-	rbd_dev = img_request->rbd_dev;
+	rbd_assert(orig_request->img_request);
+	rbd_dev = orig_request->img_request->rbd_dev;
 	rbd_assert(rbd_dev);
 	rbd_assert(obj_size == (u64)1 << rbd_dev->header.obj_order);

-	rbd_img_request_put(img_request);
-
 	if (result)
 		goto out_err;

-- 
1.7.9.5