ObjectCacher: Only r >= 0, it need the read data.

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>

diff --git a/src/osdc/ObjectCacher.cc b/src/osdc/ObjectCacher.cc
index f54c356c128933bafa8ecd6d41a81c1a46b071c9..3ee61991c84690d1555489c4ef5fe87f02bc7465 100644 (file)
--- a/src/osdc/ObjectCacher.cc
+++ b/src/osdc/ObjectCacher.cc
@@ -663,7 +663,7 @@ void ObjectCacher::bh_read_finish(int64_t poolid, sobject_t oid, ceph_tid_t tid,
                << " outstanding reads " << reads_outstanding
                << dendl;
 
-  if (bl.length() < length) {
+  if (r >= 0 && bl.length() < length) {
     bufferptr bp(length - bl.length());
     bp.zero();
     ldout(cct, 7) << "bh_read_finish " << oid << " padding " << start << "~" << length