ACPI: Defer enabling of level GPE until all pending notifies done

Level GPE should not be enabled until all work caused by it is done,
e.g. all Notify() methods are completed.
This can be accomplished by appending enable_gpe function to the end
of notify queue.

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Acked-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/acpi/events/evgpe.c b/drivers/acpi/events/evgpe.c
index e22f4a973c0f..b4509f93ff81 100644
--- a/drivers/acpi/events/evgpe.c
+++ b/drivers/acpi/events/evgpe.c
@@ -501,6 +501,7 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
  *              an interrupt handler.
  *
  ******************************************************************************/
+static void acpi_ev_asynch_enable_gpe(void *context);
 
 static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
 {
@@ -576,22 +577,30 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
                                          method_node)));
                 }
         }
+        /* Defer enabling of GPE until all notify handlers are done */
+        acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_asynch_enable_gpe,
+                                gpe_event_info);
+        return_VOID;
+}
 
-        if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
+static void acpi_ev_asynch_enable_gpe(void *context)
+{
+        struct acpi_gpe_event_info *gpe_event_info = context;
+        acpi_status status;
+        if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
             ACPI_GPE_LEVEL_TRIGGERED) {
                 /*
                  * GPE is level-triggered, we clear the GPE status bit after
                  * handling the event.
                  */
-                status = acpi_hw_clear_gpe(&local_gpe_event_info);
+                status = acpi_hw_clear_gpe(gpe_event_info);
                 if (ACPI_FAILURE(status)) {
                         return_VOID;
                 }
         }
 
         /* Enable this GPE */
-
-        (void)acpi_hw_write_gpe_enable_reg(&local_gpe_event_info);
+        (void)acpi_hw_write_gpe_enable_reg(gpe_event_info);
         return_VOID;
 }