diff --git a/lichee/linux-4.9/drivers/input/touchscreen/cst9220/hynitron_core.c b/lichee/linux-4.9/drivers/input/touchscreen/cst9220/hynitron_core.c
index b17101ef2..d910f0c3d 100755
--- a/lichee/linux-4.9/drivers/input/touchscreen/cst9220/hynitron_core.c
+++ b/lichee/linux-4.9/drivers/input/touchscreen/cst9220/hynitron_core.c
@@ -901,8 +901,12 @@ FINGER_PROCESS:
 	i2c_buf[2] = 0xAB;
 	ret = cst3xx_i2c_write(hyn_ts_data->client, i2c_buf, 3);
 	if(ret < 0) {
-		HYN_ERROR(" cst3xx hyn send read touch info ending failed.\r\n"); 
-		goto OUT_PROCESS;
+		pr_emerg(" cst3xx hyn send read touch info ending failed.\r\n"); 
+		/* don't drop the up event even if response to touch sensor fail */
+		if (buf[0] != 0)
+		{
+			goto OUT_PROCESS;
+		}
 	}
 #if (HYN_DEBUG_EN && (HYN_DEBUG_LEVEL == 2))
     hyn_show_touch_buffer(buf, cnt);