@@ -2291,7 +2291,12 @@ static void scsi_realize(SCSIDevice *dev, Error **errp)
static void scsi_hd_realize(SCSIDevice *dev, Error **errp)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
- blkconf_blocksizes(&s->qdev.conf);
+ /* can happen for devices without drive. The error message for missing
+ * backend will be issued in scsi_realize
+ */
+ if (s->qdev.conf.blk) {
+ blkconf_blocksizes(&s->qdev.conf);
+ }
s->qdev.blocksize = s->qdev.conf.logical_block_size;
s->qdev.type = TYPE_DISK;
if (!s->product) {