diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index a97f1cd..01e1dec 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -1508,6 +1508,10 @@ void scsi_req_unref(SCSIRequest *req)
    will start the next chunk or complete the command.  */
 void scsi_req_continue(SCSIRequest *req)
 {
+    if (req->io_canceled) {
+        trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag);
+        return;
+    }
     trace_scsi_req_continue(req->dev->id, req->lun, req->tag);
     if (req->cmd.mode == SCSI_XFER_TO_DEV) {
         req->ops->write_data(req);
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index d411586..4a0673c 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -178,6 +178,9 @@ static void scsi_aio_complete(void *opaque, int ret)
     assert(r->req.aiocb != NULL);
     r->req.aiocb = NULL;
     bdrv_acct_done(s->qdev.conf.bs, &r->acct);
+    if (r->req.io_canceled) {
+        goto done;
+    }
 
     if (ret < 0) {
         if (scsi_handle_rw_error(r, -ret)) {
@@ -223,6 +226,10 @@ static void scsi_write_do_fua(SCSIDiskReq *r)
 {
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
 
+    if (r->req.io_canceled) {
+        goto done;
+    }
+
     if (scsi_is_cmd_fua(&r->req.cmd)) {
         bdrv_acct_start(s->qdev.conf.bs, &r->acct, 0, BDRV_ACCT_FLUSH);
         r->req.aiocb = bdrv_aio_flush(s->qdev.conf.bs, scsi_aio_complete, r);
@@ -230,6 +237,8 @@ static void scsi_write_do_fua(SCSIDiskReq *r)
     }
 
     scsi_req_complete(&r->req, GOOD);
+
+done:
     if (!r->req.io_canceled) {
         scsi_req_unref(&r->req);
     }
@@ -243,6 +252,9 @@ static void scsi_dma_complete(void *opaque, int ret)
     assert(r->req.aiocb != NULL);
     r->req.aiocb = NULL;
     bdrv_acct_done(s->qdev.conf.bs, &r->acct);
+    if (r->req.io_canceled) {
+        goto done;
+    }
 
     if (ret < 0) {
         if (scsi_handle_rw_error(r, -ret)) {
@@ -274,6 +286,9 @@ static void scsi_read_complete(void * opaque, int ret)
     assert(r->req.aiocb != NULL);
     r->req.aiocb = NULL;
     bdrv_acct_done(s->qdev.conf.bs, &r->acct);
+    if (r->req.io_canceled) {
+        goto done;
+    }
 
     if (ret < 0) {
         if (scsi_handle_rw_error(r, -ret)) {
@@ -305,6 +320,9 @@ static void scsi_do_read(void *opaque, int ret)
         r->req.aiocb = NULL;
         bdrv_acct_done(s->qdev.conf.bs, &r->acct);
     }
+    if (r->req.io_canceled) {
+        goto done;
+    }
 
     if (ret < 0) {
         if (scsi_handle_rw_error(r, -ret)) {
@@ -312,10 +330,6 @@ static void scsi_do_read(void *opaque, int ret)
         }
     }
 
-    if (r->req.io_canceled) {
-        return;
-    }
-
     /* The request is used as the AIO opaque value, so add a ref.  */
     scsi_req_ref(&r->req);
 
@@ -423,6 +437,9 @@ static void scsi_write_complete(void * opaque, int ret)
         r->req.aiocb = NULL;
         bdrv_acct_done(s->qdev.conf.bs, &r->acct);
     }
+    if (r->req.io_canceled) {
+        goto done;
+    }
 
     if (ret < 0) {
         if (scsi_handle_rw_error(r, -ret)) {
@@ -1478,13 +1495,17 @@ static void scsi_unmap_complete(void *opaque, int ret)
     uint32_t nb_sectors;
 
     r->req.aiocb = NULL;
+    if (r->req.io_canceled) {
+        goto done;
+    }
+
     if (ret < 0) {
         if (scsi_handle_rw_error(r, -ret)) {
             goto done;
         }
     }
 
-    if (data->count > 0 && !r->req.io_canceled) {
+    if (data->count > 0) {
         sector_num = ldq_be_p(&data->inbuf[0]);
         nb_sectors = ldl_be_p(&data->inbuf[8]) & 0xffffffffULL;
         if (!check_lba_range(s, sector_num, nb_sectors)) {
@@ -1501,10 +1522,9 @@ static void scsi_unmap_complete(void *opaque, int ret)
         return;
     }
 
+    scsi_req_complete(&r->req, GOOD);
+
 done:
-    if (data->count == 0) {
-        scsi_req_complete(&r->req, GOOD);
-    }
     if (!r->req.io_canceled) {
         scsi_req_unref(&r->req);
     }
diff --git a/roms/seabios b/roms/seabios
index 4bd8aeb..e8a76b0 160000
--- a/roms/seabios
+++ b/roms/seabios
@@ -1 +1 @@
-Subproject commit 4bd8aebf3534e10d9aa21e820903f2cf9120708c
+Subproject commit e8a76b0f225bba5ba9d63ab227e0a37b3beb1059
diff --git a/trace-events b/trace-events
index f2c256c..a42497c 100644
--- a/trace-events
+++ b/trace-events
@@ -461,6 +461,7 @@ scsi_req_data(int target, int lun, int tag, int len) "target %d lun %d tag %d le
 scsi_req_data_canceled(int target, int lun, int tag, int len) "target %d lun %d tag %d len %d"
 scsi_req_dequeue(int target, int lun, int tag) "target %d lun %d tag %d"
 scsi_req_continue(int target, int lun, int tag) "target %d lun %d tag %d"
+scsi_req_continue_canceled(int target, int lun, int tag) "target %d lun %d tag %d"
 scsi_req_parsed(int target, int lun, int tag, int cmd, int mode, int xfer) "target %d lun %d tag %d command %d dir %d length %d"
 scsi_req_parsed_lba(int target, int lun, int tag, int cmd, uint64_t lba) "target %d lun %d tag %d command %d lba %"PRIu64
 scsi_req_parse_bad(int target, int lun, int tag, int cmd) "target %d lun %d tag %d command %d"