diff --git a/block/io.c b/block/io.c
index 43f85ab452..e2959920b8 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2265,7 +2265,8 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs)
 {
     int ret;
 
-    if (!bs || !bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
+    if (!bs || !bdrv_is_inserted(bs) || bdrv_is_read_only(bs) ||
+        bdrv_is_sg(bs)) {
         return 0;
     }
 
diff --git a/block/iscsi.c b/block/iscsi.c
index aff8198d3f..49cee4dda9 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -628,10 +628,6 @@ static int coroutine_fn iscsi_co_flush(BlockDriverState *bs)
     IscsiLun *iscsilun = bs->opaque;
     struct IscsiTask iTask;
 
-    if (bdrv_is_sg(bs)) {
-        return 0;
-    }
-
     if (!iscsilun->force_next_flush) {
         return 0;
     }