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-rw-r--r--blockdev.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c
index c3422a1d41..5dd01ea147 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1876,6 +1876,10 @@ void qmp_block_commit(const char *device,
      */
     BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
 
+    if (!has_speed) {
+        speed = 0;
+    }
+
     /* drain all i/o before commits */
     bdrv_drain_all();