input: evdev: Use unique wakelock names

wakelock names are now contain evdev->name and pid

Signed-off-by: Mike Chan <mike@android.com>
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 809ebeb..1848c9e 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -45,6 +45,7 @@
 	unsigned int packet_head; /* [future] position of the first element of next packet */
 	spinlock_t buffer_lock; /* protects access to buffer, head and tail */
 	struct wake_lock wake_lock;
+	char name[28];
 	struct fasync_struct *fasync;
 	struct evdev *evdev;
 	struct list_head node;
@@ -312,7 +313,9 @@
 
 	client->bufsize = bufsize;
 	spin_lock_init(&client->buffer_lock);
-	wake_lock_init(&client->wake_lock, WAKE_LOCK_SUSPEND, "evdev");
+	snprintf(client->name, sizeof(client->name), "%s-%d",
+			dev_name(&evdev->dev), task_tgid_vnr(current));
+	wake_lock_init(&client->wake_lock, WAKE_LOCK_SUSPEND, client->name);
 	client->evdev = evdev;
 	evdev_attach_client(evdev, client);