[PATCH V3] i8042: Increment wakeup_count for the respective port.

[Ravi Chandra Sadineni]

Call pm_wakeup_event on every irq. This should help us in identifying if
keyboard was a potential wake reason for the last resume.

Signed-off-by: Ravi Chandra Sadineni <ravisadineni@xxxxxxxxxxxx>
---
V3: Remove the unnecessary device_may_wakeup check.
V2: Increment the wakeup count only when there is a irq and not when the
method is called internally.

 drivers/input/serio/i8042.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 824f4c1c1f310..b8bc71569349d 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -573,6 +573,9 @@ static irqreturn_t i8042_interrupt(int irq, void *dev_id)
 	port = &i8042_ports[port_no];
 	serio = port->exists ? port->serio : NULL;
 
+	if (irq && serio)
+		pm_wakeup_event(&serio->dev, 0);
+
 	filter_dbg(port->driver_bound, data, "<- i8042 (interrupt, %d, %d%s%s)\n",
 		   port_no, irq,
 		   dfl & SERIO_PARITY ? ", bad parity" : "",
-- 
2.17.1.1185.g55be947832-goog