ACPI / bus: Move duplicate code to a separate new function

After merging commit 712e960f0ee9 (ACPI / PM: Attach ACPI power
domain only once) with commit 1dcc3d3362b0 (ACPI / bus: Move ACPI
bus type registration) there is some duplicate code in
acpi_device_is_first_physical_node() and acpi_companion_match()
that can be moved to a separate routine and called from both
places.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index a23903c8bea93b8cc2aa7ab05972e0dc202a1ebf..f39f686ed2dfbe6cd720db5e4eafe853fc0a1657 100644 (file)
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -486,6 +486,26 @@ 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)
+{
+       struct mutex *physical_node_lock = &adev->physical_node_lock;
+
+       mutex_lock(physical_node_lock);
+       if (list_empty(&adev->physical_node_list)) {
+               adev = NULL;
+       } else {
+               const struct acpi_device_physical_node *node;
+
+               node = list_first_entry(&adev->physical_node_list,
+                                       struct acpi_device_physical_node, node);
+               if (node->dev != dev)
+                       adev = NULL;
+       }
+       mutex_unlock(physical_node_lock);
+       return adev;
+}
+
 /**
  * acpi_device_is_first_physical_node - Is given dev first physical node
  * @adev: ACPI companion device
@@ -500,19 +520,7 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device)
 bool acpi_device_is_first_physical_node(struct acpi_device *adev,
                                        const struct device *dev)
 {
-       bool ret = false;
-
-       mutex_lock(&adev->physical_node_lock);
-       if (!list_empty(&adev->physical_node_list)) {
-               const struct acpi_device_physical_node *node;
-
-               node = list_first_entry(&adev->physical_node_list,
-                                       struct acpi_device_physical_node, node);
-               ret = node->dev == dev;
-       }
-       mutex_unlock(&adev->physical_node_lock);
-
-       return ret;
+       return !!acpi_primary_dev_companion(adev, dev);
 }
 
 /*
@@ -539,7 +547,6 @@ bool acpi_device_is_first_physical_node(struct acpi_device *adev,
 struct acpi_device *acpi_companion_match(const struct device *dev)
 {
        struct acpi_device *adev;
-       struct mutex *physical_node_lock;
 
        adev = ACPI_COMPANION(dev);
        if (!adev)
@@ -548,21 +555,7 @@ struct acpi_device *acpi_companion_match(const struct device *dev)
        if (list_empty(&adev->pnp.ids))
                return NULL;
 
-       physical_node_lock = &adev->physical_node_lock;
-       mutex_lock(physical_node_lock);
-       if (list_empty(&adev->physical_node_list)) {
-               adev = NULL;
-       } else {
-               const struct acpi_device_physical_node *node;
-
-               node = list_first_entry(&adev->physical_node_list,
-                                       struct acpi_device_physical_node, node);
-               if (node->dev != dev)
-                       adev = NULL;
-       }
-       mutex_unlock(physical_node_lock);
-
-       return adev;
+       return acpi_primary_dev_companion(adev, dev);
 }
 
 /**