Input: don't call input_dev_release_keys() in resume

When waking up the platform by pressing a specific key, sending a
release on that key makes it impossible to react on the event in
user-space. This is fixed by moving the input_reset_device() call to
resume instead.

[dmitry.torokhov@gmail.com: make sure we still restore LED/sound state
after resume, handle hibernation properly]

Signed-off-by: Aleksej Makarov <aleksej.makarov@sonymobile.com>
Signed-off-by: Oskar Andero <oskar.andero@sonymobile.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 846ccdd..692435a 100644 (file)
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -1653,35 +1653,36 @@ static void input_dev_toggle(struct input_dev *dev, bool activate)
  */
 void input_reset_device(struct input_dev *dev)
 {
-       mutex_lock(&dev->mutex);
+       unsigned long flags;
 
-       if (dev->users) {
-               input_dev_toggle(dev, true);
+       mutex_lock(&dev->mutex);
+       spin_lock_irqsave(&dev->event_lock, flags);
 
-               /*
-                * Keys that have been pressed at suspend time are unlikely
-                * to be still pressed when we resume.
-                */
-               spin_lock_irq(&dev->event_lock);
-               input_dev_release_keys(dev);
-               spin_unlock_irq(&dev->event_lock);
-       }
+       input_dev_toggle(dev, true);
+       input_dev_release_keys(dev);
 
+       spin_unlock_irqrestore(&dev->event_lock, flags);
        mutex_unlock(&dev->mutex);
 }
 EXPORT_SYMBOL(input_reset_device);
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int input_dev_suspend(struct device *dev)
 {
        struct input_dev *input_dev = to_input_dev(dev);
 
-       mutex_lock(&input_dev->mutex);
+       spin_lock_irq(&input_dev->event_lock);
 
-       if (input_dev->users)
-               input_dev_toggle(input_dev, false);
+       /*
+        * Keys that are pressed now are unlikely to be
+        * still pressed when we resume.
+        */
+       input_dev_release_keys(input_dev);
 
-       mutex_unlock(&input_dev->mutex);
+       /* Turn off LEDs and sounds, if any are active. */
+       input_dev_toggle(input_dev, false);
+
+       spin_unlock_irq(&input_dev->event_lock);
 
        return 0;
 }
@@ -1690,7 +1691,43 @@ static int input_dev_resume(struct device *dev)
 {
        struct input_dev *input_dev = to_input_dev(dev);
 
-       input_reset_device(input_dev);
+       spin_lock_irq(&input_dev->event_lock);
+
+       /* Restore state of LEDs and sounds, if any were active. */
+       input_dev_toggle(input_dev, true);
+
+       spin_unlock_irq(&input_dev->event_lock);
+
+       return 0;
+}
+
+static int input_dev_freeze(struct device *dev)
+{
+       struct input_dev *input_dev = to_input_dev(dev);
+
+       spin_lock_irq(&input_dev->event_lock);
+
+       /*
+        * Keys that are pressed now are unlikely to be
+        * still pressed when we resume.
+        */
+       input_dev_release_keys(input_dev);
+
+       spin_unlock_irq(&input_dev->event_lock);
+
+       return 0;
+}
+
+static int input_dev_poweroff(struct device *dev)
+{
+       struct input_dev *input_dev = to_input_dev(dev);
+
+       spin_lock_irq(&input_dev->event_lock);
+
+       /* Turn off LEDs and sounds, if any are active. */
+       input_dev_toggle(input_dev, false);
+
+       spin_unlock_irq(&input_dev->event_lock);
 
        return 0;
 }
@@ -1698,7 +1735,8 @@ static int input_dev_resume(struct device *dev)
 static const struct dev_pm_ops input_dev_pm_ops = {
        .suspend        = input_dev_suspend,
        .resume         = input_dev_resume,
-       .poweroff       = input_dev_suspend,
+       .freeze         = input_dev_freeze,
+       .poweroff       = input_dev_poweroff,
        .restore        = input_dev_resume,
 };
 #endif /* CONFIG_PM */
@@ -1707,7 +1745,7 @@ static struct device_type input_dev_type = {
        .groups         = input_dev_attr_groups,
        .release        = input_dev_release,
        .uevent         = input_dev_uevent,
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
        .pm             = &input_dev_pm_ops,
 #endif
 };