diff --git a/drivers/char/random.c b/drivers/char/random.c
index 3e133d9583a08c35b1736407f98ce13bbd9ec148..c336c78820cdf8c0050035841073ecf74e739578 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1856,7 +1856,10 @@ static long random_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
 		 */
 		if (!capable(CAP_SYS_ADMIN))
 			return -EPERM;
-		input_pool.entropy_count = 0;
+		if (xchg(&input_pool.entropy_count, 0) && random_write_wakeup_bits) {
+			wake_up_interruptible(&random_write_wait);
+			kill_fasync(&fasync, SIGIO, POLL_OUT);
+		}
 		return 0;
 	case RNDRESEEDCRNG:
 		if (!capable(CAP_SYS_ADMIN))