From db55748991bc609d941da6dc4f8c87a750c59a0e Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Date: Mon, 19 Jan 2009 20:55:50 +0100
Subject: [PATCH] --- yaml --- r: 130269 b: refs/heads/master c:
 d7b1956fed33d30c4815e848fd7a143722916868 h: refs/heads/master i:   130267:
 f5484536d3d699db731d49a92712df7c8f0607ca v: v3

---
 [refs]                            |  2 +-
 trunk/drivers/firmware/dmi_scan.c | 74 +++++++++++++++++++++++--------
 trunk/include/linux/dmi.h         |  1 +
 3 files changed, 57 insertions(+), 20 deletions(-)

diff --git a/[refs] b/[refs]
index a7486a81e616..5177c6a83ec9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: abfe2d7b915c872f3a1fd203267cedebf90daa45
+refs/heads/master: d7b1956fed33d30c4815e848fd7a143722916868
diff --git a/trunk/drivers/firmware/dmi_scan.c b/trunk/drivers/firmware/dmi_scan.c
index d76adfea5df7..8f0f7c449305 100644
--- a/trunk/drivers/firmware/dmi_scan.c
+++ b/trunk/drivers/firmware/dmi_scan.c
@@ -414,6 +414,29 @@ void __init dmi_scan_machine(void)
 	dmi_initialized = 1;
 }
 
+/**
+ *	dmi_matches - check if dmi_system_id structure matches system DMI data
+ *	@dmi: pointer to the dmi_system_id structure to check
+ */
+static bool dmi_matches(const struct dmi_system_id *dmi)
+{
+	int i;
+
+	WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n");
+
+	for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) {
+		int s = dmi->matches[i].slot;
+		if (s == DMI_NONE)
+			continue;
+		if (dmi_ident[s]
+		    && strstr(dmi_ident[s], dmi->matches[i].substr))
+			continue;
+		/* No match */
+		return false;
+	}
+	return true;
+}
+
 /**
  *	dmi_check_system - check system DMI data
  *	@list: array of dmi_system_id structures to match against
@@ -429,31 +452,44 @@ void __init dmi_scan_machine(void)
  */
 int dmi_check_system(const struct dmi_system_id *list)
 {
-	int i, count = 0;
-	const struct dmi_system_id *d = list;
-
-	WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n");
-
-	while (d->ident) {
-		for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
-			int s = d->matches[i].slot;
-			if (s == DMI_NONE)
-				continue;
-			if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
-				continue;
-			/* No match */
-			goto fail;
+	int count = 0;
+	const struct dmi_system_id *d;
+
+	for (d = list; d->ident; d++)
+		if (dmi_matches(d)) {
+			count++;
+			if (d->callback && d->callback(d))
+				break;
 		}
-		count++;
-		if (d->callback && d->callback(d))
-			break;
-fail:		d++;
-	}
 
 	return count;
 }
 EXPORT_SYMBOL(dmi_check_system);
 
+/**
+ *	dmi_first_match - find dmi_system_id structure matching system DMI data
+ *	@list: array of dmi_system_id structures to match against
+ *		All non-null elements of the list must match
+ *		their slot's (field index's) data (i.e., each
+ *		list string must be a substring of the specified
+ *		DMI slot's string data) to be considered a
+ *		successful match.
+ *
+ *	Walk the blacklist table until the first match is found.  Return the
+ *	pointer to the matching entry or NULL if there's no match.
+ */
+const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list)
+{
+	const struct dmi_system_id *d;
+
+	for (d = list; d->ident; d++)
+		if (dmi_matches(d))
+			return d;
+
+	return NULL;
+}
+EXPORT_SYMBOL(dmi_first_match);
+
 /**
  *	dmi_get_system_info - return DMI data value
  *	@field: data index (see enum dmi_field)
diff --git a/trunk/include/linux/dmi.h b/trunk/include/linux/dmi.h
index 34161907b2f8..aea23105d3ed 100644
--- a/trunk/include/linux/dmi.h
+++ b/trunk/include/linux/dmi.h
@@ -38,6 +38,7 @@ struct dmi_device {
 #ifdef CONFIG_DMI
 
 extern int dmi_check_system(const struct dmi_system_id *list);
+const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list);
 extern const char * dmi_get_system_info(int field);
 extern const struct dmi_device * dmi_find_device(int type, const char *name,
 	const struct dmi_device *from);