From 594df89a59cf2a2afc22fe27f508dd864d1edb5f Mon Sep 17 00:00:00 2001
From: Tang Chen <tangchen@cn.fujitsu.com>
Date: Fri, 26 Oct 2012 13:38:16 +0200
Subject: ACPI: Fix a hard coding style when determining if a device is a
 container, v3

"ACPI0004","PNP0A05" and "PNP0A06" are all defined in array
container_device_ids[], so use it, but not the hard coding style.

Also, introduce a new API is_container_device() to determine if a
device is a container device.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index 1f9f7d7..69e2d6b 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -92,6 +92,19 @@ static int is_device_present(acpi_handle handle)
 	return ((sta & ACPI_STA_DEVICE_PRESENT) == ACPI_STA_DEVICE_PRESENT);
 }
 
+static bool is_container_device(const char *hid)
+{
+	const struct acpi_device_id *container_id;
+
+	for (container_id = container_device_ids;
+	     container_id->id[0]; container_id++) {
+		if (!strcmp((char *)container_id->id, hid))
+			return true;
+	}
+
+	return false;
+}
+
 /*******************************************************************/
 static int acpi_container_add(struct acpi_device *device)
 {
@@ -232,10 +245,8 @@ container_walk_namespace_cb(acpi_handle handle,
 		goto end;
 	}
 
-	if (strcmp(hid, "ACPI0004") && strcmp(hid, "PNP0A05") &&
-	    strcmp(hid, "PNP0A06")) {
+	if (!is_container_device(hid))
 		goto end;
-	}
 
 	switch (*action) {
 	case INSTALL_NOTIFY_HANDLER:
-- 
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