ACPICA: Resources: Allow _DMA method in walk resources

ACPICA commit af661c00afac7aa481a961fa48c6540a99ad64a6

The _DMA object contains a resource template, this change
adds support for the walk resources function so that ACPI
devices containing a _DMA object can actually parse it to
detect DMA ranges for the respective bus.

Link: https://github.com/acpica/acpica/commit/af661c00
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/rsxface.c b/drivers/acpi/acpica/rsxface.c
index 59a4f9ed06a7cc61b9e0435aaa2361a377fdfb26..be65e65e216ebe33763dbc8deb9e36f4536cb31b 100644 (file)
--- a/drivers/acpi/acpica/rsxface.c
+++ b/drivers/acpi/acpica/rsxface.c
@@ -615,7 +615,7 @@ ACPI_EXPORT_SYMBOL(acpi_walk_resource_buffer)
  *                                device we are querying
  *              name            - Method name of the resources we want.
  *                                (METHOD_NAME__CRS, METHOD_NAME__PRS, or
- *                                METHOD_NAME__AEI)
+ *                                METHOD_NAME__AEI or METHOD_NAME__DMA)
  *              user_function   - Called for each resource
  *              context         - Passed to user_function
  *
@@ -641,11 +641,12 @@ acpi_walk_resources(acpi_handle device_handle,
        if (!device_handle || !user_function || !name ||
            (!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) &&
             !ACPI_COMPARE_NAME(name, METHOD_NAME__PRS) &&
-            !ACPI_COMPARE_NAME(name, METHOD_NAME__AEI))) {
+            !ACPI_COMPARE_NAME(name, METHOD_NAME__AEI) &&
+            !ACPI_COMPARE_NAME(name, METHOD_NAME__DMA))) {
                return_ACPI_STATUS(AE_BAD_PARAMETER);
        }
 
-       /* Get the _CRS/_PRS/_AEI resource list */
+       /* Get the _CRS/_PRS/_AEI/_DMA resource list */
 
        buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
        status = acpi_rs_get_method_data(device_handle, name, &buffer);

diff --git a/include/acpi/acnames.h b/include/acpi/acnames.h
index b421584033a51dcfdce6918c62bdd6b0273c77e4..d8dd3bf51ca735613d02da030116d0b079f288b0 100644 (file)
--- a/include/acpi/acnames.h
+++ b/include/acpi/acnames.h
@@ -54,6 +54,7 @@
 #define METHOD_NAME__CLS        "_CLS"
 #define METHOD_NAME__CRS        "_CRS"
 #define METHOD_NAME__DDN        "_DDN"
+#define METHOD_NAME__DMA        "_DMA"
 #define METHOD_NAME__HID        "_HID"
 #define METHOD_NAME__INI        "_INI"
 #define METHOD_NAME__PLD        "_PLD"