Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (75 commits)
  Input: wacom - specify Cinitq supported tools
  Input: ab8500-ponkey - fix IRQ freeing in error path
  Input: adp5588-keys - use more obvious i2c_device_id name string
  Input: ad7877 - switch to using threaded IRQ
  Input: ad7877 - use attribute group to control visibility of attributes
  Input: serio - add support for PS2Mult multiplexer protocol
  Input: wacom - properly enable runtime PM
  Input: ad7877 - filter events where pressure is beyond the maximum
  Input: ad7877 - implement EV_KEY:BTN_TOUCH reporting
  Input: ad7877 - implement specified chip select behavior
  Input: hp680_ts_input - use cancel_delayed_work_sync()
  Input: mousedev - correct lockdep annotation
  Input: ads7846 - switch to using threaded IRQ
  Input: serio - support multiple child devices per single parent
  Input: synaptics - simplify pass-through port handling
  Input: add ROHM BU21013 touch panel controller support
  Input: omap4-keypad - wake-up on events & long presses
  Input: omap4-keypad - fix interrupt line configuration
  Input: omap4-keypad - SYSCONFIG register configuration
  Input: omap4-keypad - use platform device helpers
  ...

5 files changed, 37 insertions, 11 deletions

diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 48311204ba5..04d9bf320a4 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -699,7 +699,7 @@ int elantech_init(struct psmouse *psmouse)
 
         psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
         if (!etd)
-                return -1;
+                return -ENOMEM;
 
         etd->parity[0] = 1;
         for (i = 1; i < 256; i++)
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 73a7af2542a..cd9d0c97e42 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -1584,10 +1584,10 @@ static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, co
         if (!new_dev)
                 return -ENOMEM;
 
-        while (serio->child) {
+        while (!list_empty(&serio->children)) {
                 if (++retry > 3) {
                         printk(KERN_WARNING
-                                "psmouse: failed to destroy child port, "
+                                "psmouse: failed to destroy children ports, "
                                 "protocol change aborted.\n");
                         input_free_device(new_dev);
                         return -EIO;
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 96b70a43515..2e300a46055 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -294,7 +294,29 @@ static int synaptics_pt_write(struct serio *serio, unsigned char c)
         return 0;
 }
 
-static inline int synaptics_is_pt_packet(unsigned char *buf)
+static int synaptics_pt_start(struct serio *serio)
+{
+        struct psmouse *parent = serio_get_drvdata(serio->parent);
+        struct synaptics_data *priv = parent->private;
+
+        serio_pause_rx(parent->ps2dev.serio);
+        priv->pt_port = serio;
+        serio_continue_rx(parent->ps2dev.serio);
+
+        return 0;
+}
+
+static void synaptics_pt_stop(struct serio *serio)
+{
+        struct psmouse *parent = serio_get_drvdata(serio->parent);
+        struct synaptics_data *priv = parent->private;
+
+        serio_pause_rx(parent->ps2dev.serio);
+        priv->pt_port = NULL;
+        serio_continue_rx(parent->ps2dev.serio);
+}
+
+static int synaptics_is_pt_packet(unsigned char *buf)
 {
         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 }
@@ -315,9 +337,8 @@ static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet
 
 static void synaptics_pt_activate(struct psmouse *psmouse)
 {
-        struct serio *ptport = psmouse->ps2dev.serio->child;
-        struct psmouse *child = serio_get_drvdata(ptport);
         struct synaptics_data *priv = psmouse->private;
+        struct psmouse *child = serio_get_drvdata(priv->pt_port);
 
         /* adjust the touchpad to child's choice of protocol */
         if (child) {
@@ -345,6 +366,8 @@ static void synaptics_pt_create(struct psmouse *psmouse)
         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
         serio->write = synaptics_pt_write;
+        serio->start = synaptics_pt_start;
+        serio->stop = synaptics_pt_stop;
         serio->parent = psmouse->ps2dev.serio;
 
         psmouse->pt_activate = synaptics_pt_activate;
@@ -578,9 +601,10 @@ static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
                 if (unlikely(priv->pkt_type == SYN_NEWABS))
                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 
-                if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
-                        if (psmouse->ps2dev.serio->child)
-                                synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
+                if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
+                    synaptics_is_pt_packet(psmouse->packet)) {
+                        if (priv->pt_port)
+                                synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
                 } else
                         synaptics_process_packet(psmouse);
 
@@ -731,7 +755,7 @@ int synaptics_init(struct psmouse *psmouse)
 
         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
         if (!priv)
-                return -1;
+                return -ENOMEM;
 
         psmouse_reset(psmouse);
 
diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index b6aa7d20d8a..613a3652f98 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -110,6 +110,8 @@ struct synaptics_data {
         unsigned char pkt_type;                 /* packet type - old, new, etc */
         unsigned char mode;                     /* current mode byte */
         int scroll;
+
+        struct serio *pt_port;                  /* Pass-through serio port */
 };
 
 void synaptics_module_init(void);
diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
index 0643e49ca60..54b2fa892e1 100644
--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -303,7 +303,7 @@ int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
 
         psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
         if (!psmouse->private)
-                return -1;
+                return -ENOMEM;
 
         psmouse->vendor = "IBM";
         psmouse->name = "TrackPoint";