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-rw-r--r--hw/usb/dev-storage.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/usb/dev-storage.c b/hw/usb/dev-storage.c
index 360e8ca8f2..f0f005869d 100644
--- a/hw/usb/dev-storage.c
+++ b/hw/usb/dev-storage.c
@@ -327,6 +327,10 @@ static void usb_msd_request_cancelled(SCSIRequest *req)
trace_usb_msd_cmd_cancel(req->tag);
if (req == s->req) {
+ s->csw.sig = cpu_to_le32(0x53425355);
+ s->csw.tag = cpu_to_le32(req->tag);
+ s->csw.status = 1; /* error */
+
scsi_req_unref(s->req);
s->req = NULL;
s->scsi_len = 0;