ACPICA: Dispatcher: Fix interpreter locking around acpi_ev_initialize_region()

In the code path of acpi_ev_initialize_region(), there is namespace
modification code unlocked. This patch tunes the code to make sure
such modification are always locked.

Fixes: 74f51b80a0c4 (ACPICA: Namespace: Fix dynamic table loading issues)
Tested-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/dsinit.c b/drivers/acpi/acpica/dsinit.c
index f1e6dcc..54d48b9 100644 (file)
--- a/drivers/acpi/acpica/dsinit.c
+++ b/drivers/acpi/acpica/dsinit.c
@@ -46,6 +46,7 @@
 #include "acdispat.h"
 #include "acnamesp.h"
 #include "actables.h"
+#include "acinterp.h"
 
 #define _COMPONENT          ACPI_DISPATCHER
 ACPI_MODULE_NAME("dsinit")
@@ -214,23 +215,17 @@ acpi_ds_initialize_objects(u32 table_index,
 
        /* Walk entire namespace from the supplied root */
 
-       status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-       if (ACPI_FAILURE(status)) {
-               return_ACPI_STATUS(status);
-       }
-
        /*
         * We don't use acpi_walk_namespace since we do not want to acquire
         * the namespace reader lock.
         */
        status =
            acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
-                                  ACPI_NS_WALK_UNLOCK, acpi_ds_init_one_object,
-                                  NULL, &info, NULL);
+                                  0, acpi_ds_init_one_object, NULL, &info,
+                                  NULL);
        if (ACPI_FAILURE(status)) {
                ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
        }
-       (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 
        status = acpi_get_table_by_index(table_index, &table);
        if (ACPI_FAILURE(status)) {

diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c
index 5997e59..2b3210f 100644 (file)
--- a/drivers/acpi/acpica/dsmethod.c
+++ b/drivers/acpi/acpica/dsmethod.c
@@ -99,14 +99,11 @@ acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
                          "Method auto-serialization parse [%4.4s] %p\n",
                          acpi_ut_get_node_name(node), node));
 
-       acpi_ex_enter_interpreter();
-
        /* Create/Init a root op for the method parse tree */
 
        op = acpi_ps_alloc_op(AML_METHOD_OP, obj_desc->method.aml_start);
        if (!op) {
-               status = AE_NO_MEMORY;
-               goto unlock;
+               return_ACPI_STATUS(AE_NO_MEMORY);
        }
 
        acpi_ps_set_name(op, node->name.integer);
@@ -118,8 +115,7 @@ acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
            acpi_ds_create_walk_state(node->owner_id, NULL, NULL, NULL);
        if (!walk_state) {
                acpi_ps_free_op(op);
-               status = AE_NO_MEMORY;
-               goto unlock;
+               return_ACPI_STATUS(AE_NO_MEMORY);
        }
 
        status = acpi_ds_init_aml_walk(walk_state, op, node,
@@ -128,7 +124,7 @@ acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
        if (ACPI_FAILURE(status)) {
                acpi_ds_delete_walk_state(walk_state);
                acpi_ps_free_op(op);
-               goto unlock;
+               return_ACPI_STATUS(status);
        }
 
        walk_state->descending_callback = acpi_ds_detect_named_opcodes;
@@ -138,8 +134,6 @@ acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
        status = acpi_ps_parse_aml(walk_state);
 
        acpi_ps_delete_parse_tree(op);
-unlock:
-       acpi_ex_exit_interpreter();
        return_ACPI_STATUS(status);
 }
 

diff --git a/drivers/acpi/acpica/dswload2.c b/drivers/acpi/acpica/dswload2.c
index 028b22a..e362182 100644 (file)
--- a/drivers/acpi/acpica/dswload2.c
+++ b/drivers/acpi/acpica/dswload2.c
@@ -607,11 +607,9 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
                                }
                        }
 
-                       acpi_ex_exit_interpreter();
                        status =
                            acpi_ev_initialize_region
                            (acpi_ns_get_attached_object(node), FALSE);
-                       acpi_ex_enter_interpreter();
 
                        if (ACPI_FAILURE(status)) {
                                /*

diff --git a/drivers/acpi/acpica/evrgnini.c b/drivers/acpi/acpica/evrgnini.c
index 3843f1f..75ddd16 100644 (file)
--- a/drivers/acpi/acpica/evrgnini.c
+++ b/drivers/acpi/acpica/evrgnini.c
@@ -45,6 +45,7 @@
 #include "accommon.h"
 #include "acevents.h"
 #include "acnamesp.h"
+#include "acinterp.h"
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evrgnini")
@@ -597,9 +598,11 @@ acpi_ev_initialize_region(union acpi_operand_object *region_obj,
                                        }
                                }
 
+                               acpi_ex_exit_interpreter();
                                status =
                                    acpi_ev_execute_reg_method(region_obj,
                                                               ACPI_REG_CONNECT);
+                               acpi_ex_enter_interpreter();
 
                                if (acpi_ns_locked) {
                                        status =

diff --git a/drivers/acpi/acpica/nsload.c b/drivers/acpi/acpica/nsload.c
index 334d3c5..d1f2014 100644 (file)
--- a/drivers/acpi/acpica/nsload.c
+++ b/drivers/acpi/acpica/nsload.c
@@ -137,7 +137,9 @@ unlock:
        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                          "**** Begin Table Object Initialization\n"));
 
+       acpi_ex_enter_interpreter();
        status = acpi_ds_initialize_objects(table_index, node);
+       acpi_ex_exit_interpreter();
 
        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                          "**** Completed Table Object Initialization\n"));