[PATCH 1/3] Introduce a new acpi to determine HID match.

[Tang Chen <tangchen@cn.fujitsu.com>]

This introduce a new api to determine if a HID matches a list of IDs.
Different from acpi_match_device_ids(), the new api gets HID from
acpi_device_info struct.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
---
 drivers/acpi/scan.c     |   24 ++++++++++++++++++++++++
 include/acpi/acpi_bus.h |    2 ++
 2 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 03c12e6..41fd4c9 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -312,6 +312,30 @@ int acpi_match_device_ids(struct acpi_device *device,
 }
 EXPORT_SYMBOL(acpi_match_device_ids);
 
+int acpi_match_object_info_ids(struct acpi_device_info *info,
+			       const struct acpi_device_id *ids)
+{
+	char *hardware_id;
+	int i, j;
+
+	for (i = 0; ids[i].id[0]; i++) {
+		hardware_id = info->hardware_id.string;
+		if (hardware_id &&
+		    !strcmp((char *)ids[i].id, hardware_id))
+				return 0;
+
+		for (j = 0; j < info->compatible_id_list.count; j++) {
+			hardware_id = info->compatible_id_list.ids[j].string;
+			if (hardware_id &&
+			    !strcmp((char *)ids[i].id, hardware_id))
+				return 0;
+		}
+	}
+
+	return 1;
+}
+EXPORT_SYMBOL(acpi_match_object_info_ids);
+
 static void acpi_free_ids(struct acpi_device *device)
 {
 	struct acpi_hardware_id *id, *tmp;
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index f0b9681..f83d581 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -379,6 +379,8 @@ int acpi_bus_start(struct acpi_device *device);
 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 int acpi_match_device_ids(struct acpi_device *device,
 			  const struct acpi_device_id *ids);
+int acpi_match_object_info_ids(struct acpi_device_info *info,
+			       const struct acpi_device_id *ids);
 int acpi_create_dir(struct acpi_device *);
 void acpi_remove_dir(struct acpi_device *);
 
-- 
1.7.1