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-rw-r--r--include/qemu/ratelimit.h12
1 files changed, 10 insertions, 2 deletions
diff --git a/include/qemu/ratelimit.h b/include/qemu/ratelimit.h
index 003ea6d5a3..48bf59e857 100644
--- a/include/qemu/ratelimit.h
+++ b/include/qemu/ratelimit.h
@@ -43,7 +43,11 @@ static inline int64_t ratelimit_calculate_delay(RateLimit *limit, uint64_t n)
     double delay_slices;
 
     QEMU_LOCK_GUARD(&limit->lock);
-    assert(limit->slice_quota && limit->slice_ns);
+    if (!limit->slice_quota) {
+        /* Throttling disabled.  */
+        return 0;
+    }
+    assert(limit->slice_ns);
 
     if (limit->slice_end_time < now) {
         /* Previous, possibly extended, time slice finished; reset the
@@ -83,7 +87,11 @@ static inline void ratelimit_set_speed(RateLimit *limit, uint64_t speed,
 {
     QEMU_LOCK_GUARD(&limit->lock);
     limit->slice_ns = slice_ns;
-    limit->slice_quota = MAX(((double)speed * slice_ns) / 1000000000ULL, 1);
+    if (speed == 0) {
+        limit->slice_quota = 0;
+    } else {
+        limit->slice_quota = MAX(((double)speed * slice_ns) / 1000000000ULL, 1);
+    }
 }
 
 #endif