038a866f8153c45499b80162f8e1b7188620bd8a
Output the error message string of the bdrv_open return code. Also set a
non-empty device name for the images because the unknown feature error message
includes it.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit b9eaf9ecb1
)
Read the documentation in qemu-doc.html. Fabrice Bellard.
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