[Stable-7.2.7 19/62] scsi-disk: ensure that FORMAT UNIT commands are terminated

[Michael Tokarev]

From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

Otherwise when a FORMAT UNIT command is issued, the SCSI layer can become
confused because it can find itself in the situation where it thinks there
is still data to be transferred which can cause the next emulated SCSI
command to fail.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Fixes: 6ab71761 ("scsi-disk: add FORMAT UNIT command")
Tested-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20230913204410.65650-4-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit be2b619a17345d007bcf9987a3e4afd1edea3e4f)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 915e0369cb..b884a6f135 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -1952,6 +1952,10 @@ static void scsi_disk_emulate_write_data(SCSIRequest 
*req)
         scsi_disk_emulate_write_same(r, r->iov.iov_base);
         break;
 
+    case FORMAT_UNIT:
+        scsi_req_complete(&r->req, GOOD);
+        break;
+
     default:
         abort();
     }
-- 
2.39.2