This allows to create an empty scsi-cd device without manually creating
a BlockBackend.

Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
 hw/scsi/scsi-disk.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 8dbfc10..b4e71ff 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -2359,6 +2359,11 @@ static void scsi_hd_realize(SCSIDevice *dev, Error 
**errp)
 static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
 {
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
+
+    if (!dev->conf.blk) {
+        dev->conf.blk = blk_new();
+    }
+
     s->qdev.blocksize = 2048;
     s->qdev.type = TYPE_ROM;
     s->features |= 1 << SCSI_DISK_F_REMOVABLE;
-- 
1.8.3.1


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