Patch "ACPI: resource: Add helper function acpi_dev_get_memory_resources()" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    ACPI: resource: Add helper function acpi_dev_get_memory_resources()

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     acpi-resource-add-helper-function-acpi_dev_get_memor.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 16d041ceb3b9f0867eac8a60d6ca213884d800a4
Author: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Date:   Tue Aug 16 13:16:26 2022 +0300

    ACPI: resource: Add helper function acpi_dev_get_memory_resources()
    
    [ 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>

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);