Block layer patches:
- qcow2: Fix potential corruption for preallocated resize with external data file
# gpg: Signature made Tue 16 Apr 2019 15:23:35 BST
# gpg: using RSA key
7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6
* remotes/kevin/tags/for-upstream:
qcow2: Fix preallocation bdrv_pwrite to wrong file
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>