[PATCH v1 5/5] ACPI: scan: Call acpi_get_object_info() from acpi_set_pnp_ids()

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wyso...@intel.com>

Notice that it is not necessary to call acpi_get_object_info() from
acpi_add_single_object() in order to pass the pointer returned by it
to acpi_init_device_object() and from there to acpi_set_pnp_ids().

It is more straightforward to call acpi_get_object_info() from
acpi_set_pnp_ids() and avoid unnecessary pointer passing, so change
the code accordingly.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
---
 drivers/acpi/internal.h |    2 +-
 drivers/acpi/power.c    |    2 +-
 drivers/acpi/scan.c     |   21 +++++++++------------
 3 files changed, 11 insertions(+), 14 deletions(-)

Index: linux-pm/drivers/acpi/scan.c
===================================================================
--- linux-pm.orig/drivers/acpi/scan.c
+++ linux-pm/drivers/acpi/scan.c
@@ -1307,8 +1307,9 @@ static bool acpi_object_is_system_bus(ac
 }
 
 static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
-                               int device_type, struct acpi_device_info *info)
+                            int device_type)
 {
+       struct acpi_device_info *info = NULL;
        struct acpi_pnp_device_id_list *cid_list;
        int i;
 
@@ -1319,6 +1320,7 @@ static void acpi_set_pnp_ids(acpi_handle
                        break;
                }
 
+               acpi_get_object_info(handle, &info);
                if (!info) {
                        pr_err(PREFIX "%s: Error reading device info\n",
                                        __func__);
@@ -1344,6 +1346,8 @@ static void acpi_set_pnp_ids(acpi_handle
                if (info->valid & ACPI_VALID_CLS)
                        acpi_add_id(pnp, info->class_code.string);
 
+               kfree(info);
+
                /*
                 * Some devices don't reliably have _HIDs & _CIDs, so add
                 * synthetic HIDs to make sure drivers can find them.
@@ -1649,7 +1653,7 @@ static bool acpi_device_enumeration_by_p
 }
 
 void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
-                            int type, struct acpi_device_info *info)
+                            int type)
 {
        INIT_LIST_HEAD(&device->pnp.ids);
        device->device_type = type;
@@ -1658,7 +1662,7 @@ void acpi_init_device_object(struct acpi
        fwnode_init(&device->fwnode, &acpi_device_fwnode_ops);
        acpi_set_device_status(device, ACPI_STA_DEFAULT);
        acpi_device_get_busid(device);
-       acpi_set_pnp_ids(handle, &device->pnp, type, info);
+       acpi_set_pnp_ids(handle, &device->pnp, type);
        acpi_init_properties(device);
        acpi_bus_get_flags(device);
        device->flags.match_driver = false;
@@ -1688,21 +1692,14 @@ static void acpi_scan_init_status(struct
 static int acpi_add_single_object(struct acpi_device **child,
                                  acpi_handle handle, int type)
 {
-       struct acpi_device_info *info = NULL;
        struct acpi_device *device;
        int result;
 
-       if (type == ACPI_BUS_TYPE_DEVICE && handle != ACPI_ROOT_OBJECT)
-               acpi_get_object_info(handle, &info);
-
        device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
-       if (!device) {
-               kfree(info);
+       if (!device)
                return -ENOMEM;
-       }
 
-       acpi_init_device_object(device, handle, type, info);
-       kfree(info);
+       acpi_init_device_object(device, handle, type);
        /*
         * Getting the status is delayed till here so that we can call
         * acpi_bus_get_status() and use its quirk handling.  Note that
Index: linux-pm/drivers/acpi/internal.h
===================================================================
--- linux-pm.orig/drivers/acpi/internal.h
+++ linux-pm/drivers/acpi/internal.h
@@ -109,7 +109,7 @@ struct acpi_device_bus_id {
 int acpi_device_add(struct acpi_device *device,
                    void (*release)(struct device *));
 void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
-                            int type, struct acpi_device_info *info);
+                            int type);
 int acpi_device_setup_files(struct acpi_device *dev);
 void acpi_device_remove_files(struct acpi_device *dev);
 void acpi_device_add_finalize(struct acpi_device *device);
Index: linux-pm/drivers/acpi/power.c
===================================================================
--- linux-pm.orig/drivers/acpi/power.c
+++ linux-pm/drivers/acpi/power.c
@@ -925,7 +925,7 @@ int acpi_add_power_resource(acpi_handle
                return -ENOMEM;
 
        device = &resource->device;
-       acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER, NULL);
+       acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER);
        mutex_init(&resource->resource_lock);
        INIT_LIST_HEAD(&resource->list_node);
        INIT_LIST_HEAD(&resource->dependents);