Ilya Dryomov fa355112c2 rbd: don't crash or leak on errors in rbd_img_obj_parent_read_full_callback()
- fix parent_length == img_request->xferred assert to not fire on
  copyup read failures
- don't leak pages if copyup read fails or we can't allocate a new osd
  request

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: David Disseldorp <ddiss@suse.de>
2016-10-03 16:13:48 +02:00
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