ACPI: EC: Rearrange code in acpi_ec_submit_event()

Rearange acpi_ec_event_handler() so as to avoid releasing ec->lock
and acquiring it again right away in the case when ec_event_clearing
is not ACPI_EC_EVT_TIMING_EVENT.

This also reduces the number of checks done by acpi_ec_event_handler()
in that case.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index bba96df..a1b871a 100644 (file)
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1238,6 +1238,7 @@ static void acpi_ec_event_handler(struct work_struct *work)
                acpi_ec_submit_query(ec);
 
                spin_lock_irq(&ec->lock);
+
                ec->events_to_process--;
        }
 
@@ -1246,27 +1247,30 @@ static void acpi_ec_event_handler(struct work_struct *work)
         * event handling work again regardless of whether or not the query
         * queued up above is processed successfully.
         */
-       if (ec_event_clearing == ACPI_EC_EVT_TIMING_EVENT)
+       if (ec_event_clearing == ACPI_EC_EVT_TIMING_EVENT) {
+               bool guard_timeout;
+
                acpi_ec_complete_event(ec);
-       else
-               acpi_ec_close_event(ec);
 
-       spin_unlock_irq(&ec->lock);
+               ec_dbg_evt("Event stopped");
+
+               spin_unlock_irq(&ec->lock);
 
-       ec_dbg_evt("Event stopped");
+               guard_timeout = !!ec_guard(ec);
 
-       if (ec_event_clearing == ACPI_EC_EVT_TIMING_EVENT && ec_guard(ec)) {
                spin_lock_irq(&ec->lock);
 
                /* Take care of SCI_EVT unless someone else is doing that. */
-               if (!ec->curr)
+               if (guard_timeout && !ec->curr)
                        advance_transaction(ec, false);
+       } else {
+               acpi_ec_close_event(ec);
 
-               spin_unlock_irq(&ec->lock);
+               ec_dbg_evt("Event stopped");
        }
 
-       spin_lock_irq(&ec->lock);
        ec->events_in_progress--;
+
        spin_unlock_irq(&ec->lock);
 }