From: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
[ Upstream commit 6bb057bfd9d509755349cd2a6ca5e5e6e6071304 ]
Wrapper function that finds all memory type resources by
using acpi_dev_get_resources(). It removes the need for the
drivers to check the resource data type separately.
Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Stable-dep-of: c3194949ae8f ("usb: typec: intel_pmc_mux: Don't leak the ACPI device reference count")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/acpi/resource.c | 17 +++++++++++++++++
include/linux/acpi.h | 1 +
2 files changed, 18 insertions(+)
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index f6317bc417ab1..3b9f894873365 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -788,6 +788,23 @@ int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
}
EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
+/**
+ * acpi_dev_get_memory_resources - Get current memory resources of a device.
+ * @adev: ACPI device node to get the resources for.
+ * @list: Head of the resultant list of resources (must be empty).
+ *
+ * This is a helper function that locates all memory type resources of @adev
+ * with acpi_dev_get_resources().
+ *
+ * The number of resources in the output list is returned on success, an error
+ * code reflecting the error condition is returned otherwise.
+ */
+int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
+{
+ return acpi_dev_get_resources(adev, list, is_memory, NULL);
+}
+EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
+
/**
* acpi_dev_filter_resource_type - Filter ACPI resource according to resource
* types
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 2d7df5cea2494..a23a5aea9c817 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -484,6 +484,7 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
void *preproc_data);
int acpi_dev_get_dma_resources(struct acpi_device *adev,
struct list_head *list);
+int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list);
int acpi_dev_filter_resource_type(struct acpi_resource *ares,
unsigned long types);
--
2.39.2
