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-rw-r--r--hw/scsi/scsi-disk.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index b049026..11392a8 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -652,12 +652,14 @@ static int scsi_disk_emulate_vpd_page(SCSIRequest *req, uint8_t *outbuf)
DPRINTF("Inquiry EVPD[Device identification] "
"buffer size %zd\n", req->cmd.xfer);
- outbuf[buflen++] = 0x2; /* ASCII */
- outbuf[buflen++] = 0; /* not officially assigned */
- outbuf[buflen++] = 0; /* reserved */
- outbuf[buflen++] = id_len; /* length of data following */
- memcpy(outbuf + buflen, str, id_len);
- buflen += id_len;
+ if (id_len) {
+ outbuf[buflen++] = 0x2; /* ASCII */
+ outbuf[buflen++] = 0; /* not officially assigned */
+ outbuf[buflen++] = 0; /* reserved */
+ outbuf[buflen++] = id_len; /* length of data following */
+ memcpy(outbuf + buflen, str, id_len);
+ buflen += id_len;
+ }
if (s->qdev.wwn) {
outbuf[buflen++] = 0x1; /* Binary */