[PATCH 3/4] Input: Ignore the KEY_POWER events if hibernation is in progress

[Muhammad Usama Anjum <usama.anjum@collabora.com>]

Input (Serio) drivers call input_handle_event(). Although the serio
drivers have duplicate events, they have separate code path and call
input_handle_event(). Ignore the KEY_POWER such that this event isn't
sent to the userspace if hibernation is in progress.

Abort the hibernation by calling pm_wakeup_dev_event(). In case of serio,
doesn't have wakeup source registered, this call doesn't do anything.
But there may be other input drivers which will require this.

Without this, the event is sent to the userspace and it suspends the
device after hibernation cancellation.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
---
Changes since RFC:
- Use pm_sleep_transition_in_progress()
- Update description
---
 drivers/input/input.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index a500e1e276c21..7939bd9e47668 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -26,6 +26,7 @@
 #include <linux/kstrtox.h>
 #include <linux/mutex.h>
 #include <linux/rcupdate.h>
+#include <linux/suspend.h>
 #include "input-compat.h"
 #include "input-core-private.h"
 #include "input-poller.h"
@@ -362,6 +363,11 @@ void input_handle_event(struct input_dev *dev,
 
 	lockdep_assert_held(&dev->event_lock);
 
+	if (code == KEY_POWER && pm_sleep_transition_in_progress()) {
+		pm_wakeup_dev_event(&dev->dev, 0, true);
+		return;
+	}
+
 	disposition = input_get_disposition(dev, type, code, &value);
 	if (disposition != INPUT_IGNORE_EVENT) {
 		if (type != EV_SYN)
-- 
2.47.3