From: Rafael J. Wysocki Date: Mon, 13 Jun 2022 18:15:26 +0000 (+0200) Subject: ACPI: container: Use acpi_dev_for_each_child() X-Git-Tag: v6.0-rc1~185^2~3^2~14 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=abda0af4cd3b4703649ca78abf8d283f279a3f90;p=thirdparty%2Flinux.git ACPI: container: Use acpi_dev_for_each_child() Instead of walking the list of children of an ACPI device directly, use acpi_dev_for_each_child() to carry out an action for all of the given ACPI device's children. This will help to eliminate the children list head from struct acpi_device as it is redundant and it is used in questionable ways in some places (in particular, locking is needed for walking the list pointed to it safely, but it is often missing). Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko --- diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c index ccaa647ac3d42..5b7e3b9ae3707 100644 --- a/drivers/acpi/container.c +++ b/drivers/acpi/container.c @@ -23,17 +23,18 @@ static const struct acpi_device_id container_device_ids[] = { #ifdef CONFIG_ACPI_CONTAINER -static int acpi_container_offline(struct container_dev *cdev) +static int check_offline(struct acpi_device *adev, void *not_used) { - struct acpi_device *adev = ACPI_COMPANION(&cdev->dev); - struct acpi_device *child; + if (acpi_scan_is_offline(adev, false)) + return 0; - /* Check all of the dependent devices' physical companions. */ - list_for_each_entry(child, &adev->children, node) - if (!acpi_scan_is_offline(child, false)) - return -EBUSY; + return -EBUSY; +} - return 0; +static int acpi_container_offline(struct container_dev *cdev) +{ + /* Check all of the dependent devices' physical companions. */ + return acpi_dev_for_each_child(ACPI_COMPANION(&cdev->dev), check_offline, NULL); } static void acpi_container_release(struct device *dev)