linux-kernel - [PATCH 4/7] ACPI / scan: Introduce acpi_scan_handler

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Date:	Sun, 17 Feb 2013 16:23:28 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Toshi Kani <toshi.kani@...com>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Jiang Liu <liuj97@...il.com>
Subject: [PATCH 4/7] ACPI / scan: Introduce acpi_scan_handler_matching()

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Introduce new helper routine acpi_scan_handler_matching() for
checking if the given ACPI scan handler matches a given device ID
and rework acpi_scan_match_handler() to use the new routine (that
routine will also be useful for other purposes in the future).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/scan.c |   30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

Index: test/drivers/acpi/scan.c
===================================================================
--- test.orig/drivers/acpi/scan.c
+++ test/drivers/acpi/scan.c
@@ -1658,22 +1658,32 @@ static int acpi_bus_type_and_status(acpi
 	return 0;
 }
 
+static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler,
+				       char *idstr,
+				       const struct acpi_device_id **matchid)
+{
+	const struct acpi_device_id *devid;
+
+	for (devid = handler->ids; devid->id[0]; devid++)
+		if (!strcmp((char *)devid->id, idstr)) {
+			if (matchid)
+				*matchid = devid;
+
+			return true;
+		}
+
+	return false;
+}
+
 static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr,
 					const struct acpi_device_id **matchid)
 {
 	struct acpi_scan_handler *handler;
 
-	list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) {
-		const struct acpi_device_id *devid;
+	list_for_each_entry(handler, &acpi_scan_handlers_list, list_node)
+		if (acpi_scan_handler_matching(handler, idstr, matchid))
+			return handler;
 
-		for (devid = handler->ids; devid->id[0]; devid++)
-			if (!strcmp((char *)devid->id, idstr)) {
-				if (matchid)
-					*matchid = devid;
-
-				return handler;
-			}
-	}
 	return NULL;
 }
 

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