Merge branch 'gpe-defer' into release

12 files changed, 92 insertions, 140 deletions

diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index 36867cd70eac..a6f99cc37a19 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -105,8 +105,9 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
                          struct acpi_gpe_block_info **return_gpe_block);
 
 acpi_status
-acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
-                             struct acpi_gpe_block_info *gpe_block);
+acpi_ev_initialize_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+                             struct acpi_gpe_block_info *gpe_block,
+                             void *ignored);
 
 acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block);
 
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index b8dbb9bd6962..ad88fcae4eb9 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -370,6 +370,7 @@ ACPI_EXTERN struct acpi_fixed_event_handler
 ACPI_EXTERN struct acpi_gpe_xrupt_info *acpi_gbl_gpe_xrupt_list_head;
 ACPI_EXTERN struct acpi_gpe_block_info
 *acpi_gbl_gpe_fadt_blocks[ACPI_MAX_GPE_BLOCKS];
+ACPI_EXTERN u8 acpi_all_gpes_initialized;
 
 /*****************************************************************************
  *
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 8acf1e8e479f..2ceb0c05b2d7 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -413,6 +413,7 @@ struct acpi_handler_info {
         void *context;          /* Context to be passed to handler */
         struct acpi_namespace_node *method_node;        /* Method node for this GPE level (saved) */
         u8 orig_flags;          /* Original misc info about this GPE */
+        u8 orig_enabled;        /* Set if the GPE was originally enabled */
 };
 
 union acpi_gpe_dispatch_info {
@@ -457,6 +458,7 @@ struct acpi_gpe_block_info {
         u32 register_count;     /* Number of register pairs in block */
         u16 gpe_count;          /* Number of individual GPEs in block */
         u8 block_base_number;   /* Base GPE number for this block */
+        u8 initialized;         /* If set, the GPE block has been initialized */
 };
 
 /* Information about GPE interrupt handlers, one per each interrupt level used for GPEs */
@@ -473,7 +475,6 @@ struct acpi_gpe_walk_info {
         struct acpi_gpe_block_info *gpe_block;
         u16 count;
         acpi_owner_id owner_id;
-        u8 enable_this_gpe;
         u8 execute_by_owner_id;
 };
 
diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c
index 303618889da0..c61c3039c31a 100644
--- a/drivers/acpi/acpica/evevent.c
+++ b/drivers/acpi/acpica/evevent.c
@@ -95,47 +95,6 @@ acpi_status acpi_ev_initialize_events(void)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ev_install_fadt_gpes
- *
- * PARAMETERS:  None
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks
- *              (0 and 1). The HW must be fully initialized at this point,
- *              including global lock support.
- *
- ******************************************************************************/
-
-acpi_status acpi_ev_install_fadt_gpes(void)
-{
-        acpi_status status;
-
-        ACPI_FUNCTION_TRACE(ev_install_fadt_gpes);
-
-        /* Namespace must be locked */
-
-        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-        if (ACPI_FAILURE(status)) {
-                return (status);
-        }
-
-        /* FADT GPE Block 0 */
-
-        (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
-                                           acpi_gbl_gpe_fadt_blocks[0]);
-
-        /* FADT GPE Block 1 */
-
-        (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
-                                           acpi_gbl_gpe_fadt_blocks[1]);
-
-        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-        return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ev_install_xrupt_handlers
  *
  * PARAMETERS:  None
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index 85445fb5844e..020add3eee1c 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -363,6 +363,7 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
         gpe_block->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH);
         gpe_block->register_count = register_count;
         gpe_block->block_base_number = gpe_block_base_number;
+        gpe_block->initialized = FALSE;
 
         ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address,
                     sizeof(struct acpi_generic_address));
@@ -385,11 +386,12 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
                 return_ACPI_STATUS(status);
         }
 
+        acpi_all_gpes_initialized = FALSE;
+
         /* Find all GPE methods (_Lxx or_Exx) for this block */
 
         walk_info.gpe_block = gpe_block;
         walk_info.gpe_device = gpe_device;
-        walk_info.enable_this_gpe = FALSE;
         walk_info.execute_by_owner_id = FALSE;
 
         status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device,
@@ -434,35 +436,34 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
  ******************************************************************************/
 
 acpi_status
-acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
-                             struct acpi_gpe_block_info *gpe_block)
+acpi_ev_initialize_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+                             struct acpi_gpe_block_info *gpe_block,
+                             void *ignored)
 {
         acpi_status status;
         struct acpi_gpe_event_info *gpe_event_info;
         u32 gpe_enabled_count;
         u32 gpe_index;
-        u32 gpe_number;
         u32 i;
         u32 j;
 
         ACPI_FUNCTION_TRACE(ev_initialize_gpe_block);
 
-        /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */
-
-        if (!gpe_block) {
+        /*
+         * Ignore a null GPE block (e.g., if no GPE block 1 exists) and
+         * GPE blocks that have been initialized already.
+         */
+        if (!gpe_block || gpe_block->initialized) {
                 return_ACPI_STATUS(AE_OK);
         }
 
         /*
-         * Enable all GPEs that have a corresponding method.  Any other GPEs
-         * within this block must be enabled via the acpi_enable_gpe interface.
+         * Enable all GPEs that have a corresponding method and have the
+         * ACPI_GPE_CAN_WAKE flag unset.  Any other GPEs within this block must
+         * be enabled via the acpi_enable_gpe() interface.
          */
         gpe_enabled_count = 0;
 
-        if (gpe_device == acpi_gbl_fadt_gpe_device) {
-                gpe_device = NULL;
-        }
-
         for (i = 0; i < gpe_block->register_count; i++) {
                 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
 
@@ -470,27 +471,19 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
 
                         gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j;
                         gpe_event_info = &gpe_block->event_info[gpe_index];
-                        gpe_number = gpe_index + gpe_block->block_base_number;
 
                         /* Ignore GPEs that have no corresponding _Lxx/_Exx method */
 
-                        if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) {
+                        if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)
+                            || (gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
                                 continue;
                         }
 
-                        /*
-                         * If the GPE has already been enabled for runtime
-                         * signaling, make sure it remains enabled, but do not
-                         * increment its reference counter.
-                         */
-                        status = gpe_event_info->runtime_count ?
-                                acpi_ev_enable_gpe(gpe_event_info) :
-                                acpi_enable_gpe(gpe_device, gpe_number);
-
+                        status = acpi_raw_enable_gpe(gpe_event_info);
                         if (ACPI_FAILURE(status)) {
                                 ACPI_EXCEPTION((AE_INFO, status,
-                                                "Could not enable GPE 0x%02X",
-                                                gpe_number));
+                                        "Could not enable GPE 0x%02X",
+                                        gpe_index + gpe_block->block_base_number));
                                 continue;
                         }
 
@@ -504,5 +497,7 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
                                   gpe_enabled_count));
         }
 
+        gpe_block->initialized = TRUE;
+
         return_ACPI_STATUS(AE_OK);
 }
diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c
index 3084c5de1bba..2c7def95f721 100644
--- a/drivers/acpi/acpica/evgpeinit.c
+++ b/drivers/acpi/acpica/evgpeinit.c
@@ -210,8 +210,7 @@ acpi_status acpi_ev_gpe_initialize(void)
  *
  * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
  *              result of a Load() or load_table() operation. If new GPE
- *              methods have been installed, register the new methods and
- *              enable and runtime GPEs that are associated with them.
+ *              methods have been installed, register the new methods.
  *
  ******************************************************************************/
 
@@ -239,7 +238,6 @@ void acpi_ev_update_gpes(acpi_owner_id table_owner_id)
         walk_info.owner_id = table_owner_id;
         walk_info.execute_by_owner_id = TRUE;
         walk_info.count = 0;
-        walk_info.enable_this_gpe = TRUE;
 
         /* Walk the interrupt level descriptor list */
 
@@ -301,8 +299,6 @@ void acpi_ev_update_gpes(acpi_owner_id table_owner_id)
  *
  * If walk_info->execute_by_owner_id is TRUE, we only execute examine GPE methods
  *    with that owner.
- * If walk_info->enable_this_gpe is TRUE, the GPE that is referred to by a GPE
- *    method is immediately enabled (Used for Load/load_table operators)
  *
  ******************************************************************************/
 
@@ -315,8 +311,6 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
         struct acpi_gpe_walk_info *walk_info =
             ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
         struct acpi_gpe_event_info *gpe_event_info;
-        struct acpi_namespace_node *gpe_device;
-        acpi_status status;
         u32 gpe_number;
         char name[ACPI_NAME_SIZE + 1];
         u8 type;
@@ -421,29 +415,6 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
         gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_METHOD);
         gpe_event_info->dispatch.method_node = method_node;
 
-        /*
-         * Enable this GPE if requested. This only happens when during the
-         * execution of a Load or load_table operator. We have found a new
-         * GPE method and want to immediately enable the GPE if it is a
-         * runtime GPE.
-         */
-        if (walk_info->enable_this_gpe) {
-
-                walk_info->count++;
-                gpe_device = walk_info->gpe_device;
-
-                if (gpe_device == acpi_gbl_fadt_gpe_device) {
-                        gpe_device = NULL;
-                }
-
-                status = acpi_enable_gpe(gpe_device, gpe_number);
-                if (ACPI_FAILURE(status)) {
-                        ACPI_EXCEPTION((AE_INFO, status,
-                                        "Could not enable GPE 0x%02X",
-                                        gpe_number));
-                }
-        }
-
         ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
                           "Registered GPE method %s as GPE number 0x%.2X\n",
                           name, gpe_number));
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
index 14e48add32fa..36af222cac65 100644
--- a/drivers/acpi/acpica/evxface.c
+++ b/drivers/acpi/acpica/evxface.c
@@ -726,15 +726,16 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
                         (ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
 
         /*
-         * If the GPE is associated with a method and it cannot wake up the
-         * system from sleep states, it was enabled automatically during
-         * initialization, so it has to be disabled now to avoid spurious
-         * execution of the handler.
+         * If the GPE is associated with a method, it might have been enabled
+         * automatically during initialization, in which case it has to be
+         * disabled now to avoid spurious execution of the handler.
          */
 
         if ((handler->orig_flags & ACPI_GPE_DISPATCH_METHOD)
-            && !(gpe_event_info->flags & ACPI_GPE_CAN_WAKE))
+            && gpe_event_info->runtime_count) {
+                handler->orig_enabled = 1;
                 (void)acpi_raw_disable_gpe(gpe_event_info);
+        }
 
         /* Install the handler */
 
@@ -837,13 +838,13 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
         gpe_event_info->flags |= handler->orig_flags;
 
         /*
-         * If the GPE was previously associated with a method and it cannot wake
-         * up the system from sleep states, it should be enabled at this point
-         * to restore the post-initialization configuration.
+         * If the GPE was previously associated with a method and it was
+         * enabled, it should be enabled at this point to restore the
+         * post-initialization configuration.
          */
 
         if ((handler->orig_flags & ACPI_GPE_DISPATCH_METHOD)
-            && !(gpe_event_info->flags & ACPI_GPE_CAN_WAKE))
+            && handler->orig_enabled)
                 (void)acpi_raw_enable_gpe(gpe_event_info);
 
         /* Now we can free the handler object */
diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
index 304825528d48..a1dabe3fd8ae 100644
--- a/drivers/acpi/acpica/evxfevnt.c
+++ b/drivers/acpi/acpica/evxfevnt.c
@@ -379,21 +379,12 @@ acpi_status acpi_gpe_can_wake(acpi_handle gpe_device, u32 gpe_number)
         /* Ensure that we have a valid GPE number */
 
         gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
-        if (!gpe_event_info) {
+        if (gpe_event_info) {
+                gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+        } else {
                 status = AE_BAD_PARAMETER;
-                goto unlock_and_exit;
-        }
-
-        if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) {
-                goto unlock_and_exit;
         }
 
-        gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
-        if (gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD) {
-                (void)acpi_raw_disable_gpe(gpe_event_info);
-        }
-
-unlock_and_exit:
         acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
         return_ACPI_STATUS(status);
 }
@@ -651,7 +642,7 @@ acpi_install_gpe_block(acpi_handle gpe_device,
                        struct acpi_generic_address *gpe_block_address,
                        u32 register_count, u32 interrupt_number)
 {
-        acpi_status status;
+        acpi_status status = AE_OK;
         union acpi_operand_object *obj_desc;
         struct acpi_namespace_node *node;
         struct acpi_gpe_block_info *gpe_block;
@@ -715,10 +706,6 @@ acpi_install_gpe_block(acpi_handle gpe_device,
 
         obj_desc->device.gpe_block = gpe_block;
 
-        /* Enable the runtime GPEs in the new block */
-
-        status = acpi_ev_initialize_gpe_block(node, gpe_block);
-
       unlock_and_exit:
         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
         return_ACPI_STATUS(status);
@@ -924,3 +911,43 @@ acpi_status acpi_enable_all_runtime_gpes(void)
 
         return_ACPI_STATUS(status);
 }
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_update_gpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Enable all GPEs that have associated _Lxx or _Exx methods and
+ *              are not pointed to by any device _PRW methods indicating that
+ *              these GPEs are generally intended for system or device wakeup
+ *              (such GPEs have to be enabled directly when the devices whose
+ *              _PRW methods point to them are set up for wakeup signaling).
+ *
+ ******************************************************************************/
+
+acpi_status acpi_update_gpes(void)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_update_gpes);
+
+        status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        } else if (acpi_all_gpes_initialized) {
+                goto unlock;
+        }
+
+        status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, NULL);
+        if (ACPI_SUCCESS(status)) {
+                acpi_all_gpes_initialized = TRUE;
+        }
+
+unlock:
+        (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+
+        return_ACPI_STATUS(status);
+}
diff --git a/drivers/acpi/acpica/utglobal.c b/drivers/acpi/acpica/utglobal.c
index 4a5dcaa268de..e87bc6760be6 100644
--- a/drivers/acpi/acpica/utglobal.c
+++ b/drivers/acpi/acpica/utglobal.c
@@ -768,6 +768,7 @@ acpi_status acpi_ut_init_globals(void)
         acpi_gbl_gpe_fadt_blocks[0] = NULL;
         acpi_gbl_gpe_fadt_blocks[1] = NULL;
         acpi_current_gpe_count = 0;
+        acpi_all_gpes_initialized = FALSE;
 
         /* Global handlers */
 
diff --git a/drivers/acpi/acpica/utxface.c b/drivers/acpi/acpica/utxface.c
index c2da90f5fbe9..1f484c9a6888 100644
--- a/drivers/acpi/acpica/utxface.c
+++ b/drivers/acpi/acpica/utxface.c
@@ -299,19 +299,6 @@ acpi_status acpi_initialize_objects(u32 flags)
         }
 
         /*
-         * Complete the GPE initialization for the GPE blocks defined in the FADT
-         * (GPE block 0 and 1).
-         *
-         * NOTE: Currently, there seems to be no need to run the _REG methods
-         * before enabling the GPEs.
-         */
-        if (!(flags & ACPI_NO_EVENT_INIT)) {
-                status = acpi_ev_install_fadt_gpes();
-                if (ACPI_FAILURE(status))
-                        return (status);
-        }
-
-        /*
          * Empty the caches (delete the cached objects) on the assumption that
          * the table load filled them up more than they will be at runtime --
          * thus wasting non-paged memory.
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 3fe29e992be8..44f99bd83741 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -725,6 +725,7 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
                         complete_dock(ds);
                         dock_event(ds, event, DOCK_EVENT);
                         dock_lock(ds, 1);
+                        acpi_update_gpes();
                         break;
                 }
                 if (dock_present(ds) || dock_in_progress(ds))
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 6155eeb2e89a..2b6c21d86b98 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1434,6 +1434,7 @@ EXPORT_SYMBOL(acpi_bus_add);
 int acpi_bus_start(struct acpi_device *device)
 {
         struct acpi_bus_ops ops;
+        int result;
 
         if (!device)
                 return -EINVAL;
@@ -1441,7 +1442,11 @@ int acpi_bus_start(struct acpi_device *device)
         memset(&ops, 0, sizeof(ops));
         ops.acpi_op_start = 1;
 
-        return acpi_bus_scan(device->handle, &ops, NULL);
+        result = acpi_bus_scan(device->handle, &ops, NULL);
+
+        acpi_update_gpes();
+
+        return result;
 }
 EXPORT_SYMBOL(acpi_bus_start);
 
@@ -1555,6 +1560,8 @@ int __init acpi_scan_init(void)
 
         if (result)
                 acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
+        else
+                acpi_update_gpes();
 
         return result;
 }