The first eject command didn't work because the is_inserted() check
failed.
I have no clue why the code had the is_inserted() check, as it doesn't matter
if there is a disk present at the host drive, when the user wants the virtual
device to be disconnected from the host device.
The is_inserted() check has another side effect: a memory leak if the "change"
command is used multiple times, as do_change() calls eject_device() before
re-opening the block device, but bdrv_close() is never called.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>