1 files changed, 42 insertions, 14 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 2735f86c23cc..aba57abe6978 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -665,23 +665,50 @@ static void synaptics_pt_stop(struct serio *serio)
 	priv->pt_port = NULL;
 }
 
+static int synaptics_pt_open(struct serio *serio)
+{
+	struct psmouse *parent = psmouse_from_serio(serio->parent);
+	struct synaptics_data *priv = parent->private;
+
+	guard(serio_pause_rx)(parent->ps2dev.serio);
+	priv->pt_port_open = true;
+
+	return 0;
+}
+
+static void synaptics_pt_close(struct serio *serio)
+{
+	struct psmouse *parent = psmouse_from_serio(serio->parent);
+	struct synaptics_data *priv = parent->private;
+
+	guard(serio_pause_rx)(parent->ps2dev.serio);
+	priv->pt_port_open = false;
+}
+
 static int synaptics_is_pt_packet(u8 *buf)
 {
 	return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 }
 
-static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
+static void synaptics_pass_pt_packet(struct synaptics_data *priv, u8 *packet)
 {
-	struct psmouse *child = psmouse_from_serio(ptport);
+	struct serio *ptport;
 
-	if (child && child->state == PSMOUSE_ACTIVATED) {
-		serio_interrupt(ptport, packet[1], 0);
-		serio_interrupt(ptport, packet[4], 0);
-		serio_interrupt(ptport, packet[5], 0);
-		if (child->pktsize == 4)
-			serio_interrupt(ptport, packet[2], 0);
-	} else {
-		serio_interrupt(ptport, packet[1], 0);
+	ptport = priv->pt_port;
+	if (!ptport)
+		return;
+
+	serio_interrupt(ptport, packet[1], 0);
+
+	if (priv->pt_port_open) {
+		struct psmouse *child = psmouse_from_serio(ptport);
+
+		if (child->state == PSMOUSE_ACTIVATED) {
+			serio_interrupt(ptport, packet[4], 0);
+			serio_interrupt(ptport, packet[5], 0);
+			if (child->pktsize == 4)
+				serio_interrupt(ptport, packet[2], 0);
+		}
 	}
 }
 
@@ -720,6 +747,8 @@ static void synaptics_pt_create(struct psmouse *psmouse)
 	serio->write = synaptics_pt_write;
 	serio->start = synaptics_pt_start;
 	serio->stop = synaptics_pt_stop;
+	serio->open = synaptics_pt_open;
+	serio->close = synaptics_pt_close;
 	serio->parent = psmouse->ps2dev.serio;
 
 	psmouse->pt_activate = synaptics_pt_activate;
@@ -1216,11 +1245,10 @@ static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 
 		if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
 		    synaptics_is_pt_packet(psmouse->packet)) {
-			if (priv->pt_port)
-				synaptics_pass_pt_packet(priv->pt_port,
-							 psmouse->packet);
-		} else
+			synaptics_pass_pt_packet(priv, psmouse->packet);
+		} else {
 			synaptics_process_packet(psmouse);
+		}
 
 		return PSMOUSE_FULL_PACKET;
 	}