diff --git a/drivers/char/random.c b/drivers/char/random.c
index 3cb37760dfec231e4858e062100c3526be30f0be..b9ae54c243a92d7025a0dd347d1ab994dcd036a8 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1100,7 +1100,8 @@ void add_interrupt_randomness(int irq)
 	if (new_count & MIX_INFLIGHT)
 		return;
 
-	if (new_count < 1024 && !time_is_before_jiffies(fast_pool->last + HZ))
+	if (new_count < 1024 && !time_is_before_jiffies(fast_pool->last + HZ) &&
+			crng_ready())
 		return;
 
 	fast_pool->count |= MIX_INFLIGHT;