[v3] serio: add support for PS2Mult multiplexer protocol

Commit Message

Dmitry Torokhov Oct. 14, 2010, 2:23 p.m. UTC

None

Patch

diff --git a/drivers/input/serio/ps2mult.c b/drivers/input/serio/ps2mult.c
index 3664398..ec8f8c1 100644
--- a/drivers/input/serio/ps2mult.c
+++ b/drivers/input/serio/ps2mult.c
@@ -28,6 +28,7 @@  MODULE_LICENSE("GPL");
 struct ps2mult_port {
 	struct serio *serio;
 	unsigned char sel;
+	bool registered;
 };
 
 #define PS2MULT_NUM_PORTS	2
@@ -107,7 +108,7 @@  static int ps2mult_serio_start(struct serio *serio)
 	unsigned long flags;
 
 	spin_lock_irqsave(&psm->lock, flags);
-	port->serio = serio;
+	port->registered = true;
 	spin_unlock_irqrestore(&psm->lock, flags);
 
 	return 0;
@@ -120,7 +121,7 @@  static void ps2mult_serio_stop(struct serio *serio)
 	unsigned long flags;
 
 	spin_lock_irqsave(&psm->lock, flags);
-	port->serio = NULL;
+	port->registered = false;
 	spin_unlock_irqrestore(&psm->lock, flags);
 }
 
@@ -144,8 +145,7 @@  static int ps2mult_create_port(struct ps2mult *psm, int i)
 	serio->parent = psm->mx_serio;
 	serio->port_data = &psm->ports[i];
 
-	serio_register_port(serio);
-	dev_info(&serio->dev, "%s port at %s\n", serio->name, mx_serio->phys);
+	psm->ports[i].serio = serio;
 
 	return 0;
 }
@@ -196,8 +196,12 @@  static int ps2mult_connect(struct serio *serio, struct serio_driver *drv)
 
 	ps2mult_reset(psm);
 
-	for (i = 0; i <  PS2MULT_NUM_PORTS; i++)
-		serio_register_port(psm->ports[i].serio);
+	for (i = 0; i <  PS2MULT_NUM_PORTS; i++) {
+		struct serio *s = psm->ports[i].serio;
+
+		dev_info(&serio->dev, "%s port at %s\n", s->name, serio->phys);
+		serio_register_port(s);
+	}
 
 	return 0;
 
@@ -243,7 +247,7 @@  static irqreturn_t ps2mult_interrupt(struct serio *serio,
 	if (psm->escape) {
 		psm->escape = false;
 		in_port = psm->in_port;
-		if (in_port->serio)
+		if (in_port->registered)
 			serio_interrupt(in_port->serio, data, dfl);
 		goto out;
 	}
@@ -279,8 +283,9 @@  static irqreturn_t ps2mult_interrupt(struct serio *serio,
 
 	default:
 		in_port = psm->in_port;
-		if (in_port->serio)
+		if (in_port->registered)
 			serio_interrupt(in_port->serio, data, dfl);
+		break;
 	}
 
  out: