diff --git a/drivers/char/random.c b/drivers/char/random.c
index 91ea1fbac6f8c3bd923a2c4ffb5f9c50989dea47..8f29cbc0849e9dd02b85c6ec5875a5e7822446de 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1988,7 +1988,10 @@ 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))