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>

diff --git a/drivers/acpi/events/evgpe.c b/drivers/acpi/events/evgpe.c
index e22f4a973c0fdc4d4cf5670e8ace14d83e75abe1..b4509f93ff8172ecea831b47f054fbb25d06b6f9 100644 (file)
--- 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;
 }
 

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index e3a673a008453dfda694aab503dad0c89b19cb1e..21d34595dbae4a7f5e5d5991d55e52a1f54cc95f 100644 (file)
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -618,25 +618,6 @@ static void acpi_os_execute_deferred(struct work_struct *work)
        dpc->function(dpc->context);
        kfree(dpc);
 
-       /* Yield cpu to notify thread */
-       cond_resched();
-
-       return;
-}
-
-static void acpi_os_execute_notify(struct work_struct *work)
-{
-       struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
-
-       if (!dpc) {
-               printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
-               return;
-       }
-
-       dpc->function(dpc->context);
-
-       kfree(dpc);
-
        return;
 }
 
@@ -660,7 +641,7 @@ acpi_status acpi_os_execute(acpi_execute_type type,
 {
        acpi_status status = AE_OK;
        struct acpi_os_dpc *dpc;
-
+       struct workqueue_struct *queue;
        ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
                          "Scheduling function [%p(%p)] for deferred execution.\n",
                          function, context));
@@ -684,20 +665,13 @@ acpi_status acpi_os_execute(acpi_execute_type type,
        dpc->function = function;
        dpc->context = context;
 
-       if (type == OSL_NOTIFY_HANDLER) {
-               INIT_WORK(&dpc->work, acpi_os_execute_notify);
-               if (!queue_work(kacpi_notify_wq, &dpc->work)) {
-                       status = AE_ERROR;
-                       kfree(dpc);
-               }
-       } else {
-               INIT_WORK(&dpc->work, acpi_os_execute_deferred);
-               if (!queue_work(kacpid_wq, &dpc->work)) {
-                       ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                 "Call to queue_work() failed.\n"));
-                       status = AE_ERROR;
-                       kfree(dpc);
-               }
+       INIT_WORK(&dpc->work, acpi_os_execute_deferred);
+       queue = (type == OSL_NOTIFY_HANDLER) ? kacpi_notify_wq : kacpid_wq;
+       if (!queue_work(queue, &dpc->work)) {
+               ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+                         "Call to queue_work() failed.\n"));
+               status = AE_ERROR;
+               kfree(dpc);
        }
        return_ACPI_STATUS(status);
 }