Factor out the code that finds the first physical device
of a given ACPI device. It is used in several places.
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Signed-off-by: Aleksey Makarov <aleksey.makarov@xxxxxxxxxx>
---
drivers/acpi/acpi_platform.c | 19 ++-----------------
drivers/acpi/bus.c | 33 ++++++++++++++++++++++-----------
drivers/acpi/internal.h | 1 +
3 files changed, 25 insertions(+), 28 deletions(-)
diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
index 296b7a1..c3af108 100644
--- a/drivers/acpi/acpi_platform.c
+++ b/drivers/acpi/acpi_platform.c
@@ -43,7 +43,6 @@ static const struct acpi_device_id forbidden_id_list[] = {
struct platform_device *acpi_create_platform_device(struct acpi_device *adev)
{
struct platform_device *pdev = NULL;
- struct acpi_device *acpi_parent;
struct platform_device_info pdevinfo;
struct resource_entry *rentry;
struct list_head resource_list;
@@ -82,22 +81,8 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev)
* attached to it, that physical device should be the parent of the
* platform device we are about to create.
*/
- pdevinfo.parent = NULL;
- acpi_parent = adev->parent;
- if (acpi_parent) {
- struct acpi_device_physical_node *entry;
- struct list_head *list;
-
- mutex_lock(&acpi_parent->physical_node_lock);
- list = &acpi_parent->physical_node_list;
- if (!list_empty(list)) {
- entry = list_first_entry(list,
- struct acpi_device_physical_node,
- node);
- pdevinfo.parent = entry->dev;
- }
- mutex_unlock(&acpi_parent->physical_node_lock);
- }
+ pdevinfo.parent = adev->parent ?
+ acpi_get_first_physical_node(adev->parent) : NULL;
pdevinfo.name = dev_name(&adev->dev);
pdevinfo.id = -1;
pdevinfo.res = resources;
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index a212cef..832b26d 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -478,24 +478,35 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device)
Device Matching
-------------------------------------------------------------------------- */
-static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev,
- const struct device *dev)
+/**
+ * acpi_device_fix_parent - Get first physical node of an ACPI device
+ * @adev: ACPI device in question
+ */
+struct device *acpi_get_first_physical_node(struct acpi_device *adev)
{
struct mutex *physical_node_lock = &adev->physical_node_lock;
+ struct device *node = NULL;
mutex_lock(physical_node_lock);
- if (list_empty(&adev->physical_node_list)) {
- adev = NULL;
- } else {
- const struct acpi_device_physical_node *node;
+ if (!list_empty(&adev->physical_node_list))
node = list_first_entry(&adev->physical_node_list,
- struct acpi_device_physical_node, node);
- if (node->dev != dev)
- adev = NULL;
- }
+ struct acpi_device_physical_node, node)->dev;
+
mutex_unlock(physical_node_lock);
- return adev;
+
+ return node;
+}
+
+static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev,
+ const struct device *dev)
+{
+ const struct device *node = acpi_get_first_physical_node(adev);
+
+ if (node && node == dev)
+ return adev;
+
+ return NULL;
}
/**
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 11d87bf..ee9312ba 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -98,6 +98,7 @@ bool acpi_device_is_present(struct acpi_device *adev);
bool acpi_device_is_battery(struct acpi_device *adev);
bool acpi_device_is_first_physical_node(struct acpi_device *adev,
const struct device *dev);
+struct device *acpi_get_first_physical_node(struct acpi_device *adev);
/* --------------------------------------------------------------------------
Device Matching and Notification
--
2.7.0
--
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