Input: atkbd - postpone restoring LED/repeat rate at resume

We need to postpone restoring LED state and typematic settings until
keyboard is finished reconnecting upon resume. Normally driver core
and PM infrastructure takes care of proper ordering and dependencies,
but or case actual reconnect is done asynchronously from kseriod.
So while driver core thinks that keyboard was resumed and it is time
to let input core run it's resume handlers in reality keyboard is not
ready yet. The solution is to keep rescheduling work that adjusts LED
and rate settings until keyboard is fully enabled.

Reported-by: Carlos R. Mafra <crmafra2@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c
index 73b5304247299d9b7f2ffe1a7a1e85a7c93fbf78..de520386f13f76192cfc241fa665ea56808e7c84 100644 (file)
--- a/drivers/input/keyboard/atkbd.c
+++ b/drivers/input/keyboard/atkbd.c
@@ -574,11 +574,22 @@ static void atkbd_event_work(struct work_struct *work)
 
        mutex_lock(&atkbd->event_mutex);
 
-       if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask))
-               atkbd_set_leds(atkbd);
+       if (!atkbd->enabled) {
+               /*
+                * Serio ports are resumed asynchronously so while driver core
+                * thinks that device is already fully operational in reality
+                * it may not be ready yet. In this case we need to keep
+                * rescheduling till reconnect completes.
+                */
+               schedule_delayed_work(&atkbd->event_work,
+                                       msecs_to_jiffies(100));
+       } else {
+               if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask))
+                       atkbd_set_leds(atkbd);
 
-       if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask))
-               atkbd_set_repeat_rate(atkbd);
+               if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask))
+                       atkbd_set_repeat_rate(atkbd);
+       }
 
        mutex_unlock(&atkbd->event_mutex);
 }