From 3bd561e1572ee02a50cd1a5be339abf1a5b78d56 Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Wed, 6 Apr 2022 16:12:08 +0300
Subject: [PATCH] ACPI: property: Release subnode properties with data nodes
Git-commit: 3bd561e1572ee02a50cd1a5be339abf1a5b78d56
References: git-fixes
Patch-mainline: v5.19-rc1

struct acpi_device_properties describes one source of properties present
on either struct acpi_device or struct acpi_data_node. When properties are
parsed, both are populated but when released, only those properties that
are associated with the device node are freed.

Fix this by also releasing memory of the data node properties.

Fixes: 5f5e4890d57a ("ACPI / property: Allow multiple property compatible _DSD entries")
Cc: 4.20+ <stable@vger.kernel.org> # 4.20+
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/acpi/property.c |   18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -421,6 +421,16 @@ void acpi_init_properties(struct acpi_de
 			 ACPI_DT_NAMESPACE_HID " requires 'compatible' property\n");
 }
 
+static void acpi_free_device_properties(struct list_head *list)
+{
+	struct acpi_device_properties *props, *tmp;
+
+	list_for_each_entry_safe(props, tmp, list, list) {
+		list_del(&props->list);
+		kfree(props);
+	}
+}
+
 static void acpi_destroy_nondev_subnodes(struct list_head *list)
 {
 	struct acpi_data_node *dn, *next;
@@ -433,22 +443,18 @@ static void acpi_destroy_nondev_subnodes
 		wait_for_completion(&dn->kobj_done);
 		list_del(&dn->sibling);
 		ACPI_FREE((void *)dn->data.pointer);
+		acpi_free_device_properties(&dn->data.properties);
 		kfree(dn);
 	}
 }
 
 void acpi_free_properties(struct acpi_device *adev)
 {
-	struct acpi_device_properties *props, *tmp;
-
 	acpi_destroy_nondev_subnodes(&adev->data.subnodes);
 	ACPI_FREE((void *)adev->data.pointer);
 	adev->data.of_compatible = NULL;
 	adev->data.pointer = NULL;
-	list_for_each_entry_safe(props, tmp, &adev->data.properties, list) {
-		list_del(&props->list);
-		kfree(props);
-	}
+	acpi_free_device_properties(&adev->data.properties);
 }
 
 /**