Let drivers walk the DMI table for their own needs. Some drivers need
data stored in OEM-specific DMI records for proper operation.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
---
Updated to apply cleanly on top of 2.6.24.

 drivers/firmware/dmi_scan.c |   61 +++++++++++++++++++++++++++++++++----------
 include/linux/dmi.h         |    3 ++
 2 files changed, 50 insertions(+), 14 deletions(-)

--- linux-2.6.24-rc5.orig/drivers/firmware/dmi_scan.c	2007-12-12 12:36:34.000000000 +0100
+++ linux-2.6.24-rc5/drivers/firmware/dmi_scan.c	2007-12-18 14:27:28.000000000 +0100
@@ -36,18 +36,12 @@ static char * __init dmi_string(const st
  *	We have to be cautious here. We have seen BIOSes with DMI pointers
  *	pointing to completely the wrong place for example
  */
-static int __init dmi_table(u32 base, int len, int num,
-			    void (*decode)(const struct dmi_header *))
+static void dmi_table(u8 *buf, int len, int num,
+		      void (*decode)(const struct dmi_header *))
 {
-	u8 *buf, *data;
+	u8 *data = buf;
 	int i = 0;
 
-	buf = dmi_ioremap(base, len);
-	if (buf == NULL)
-		return -1;
-
-	data = buf;
-
 	/*
 	 *	Stop when we see all the items the table claimed to have
 	 *	OR we run off the end of the table (also happens)
@@ -68,7 +62,23 @@ static int __init dmi_table(u32 base, in
 		data += 2;
 		i++;
 	}
-	dmi_iounmap(buf, len);
+}
+
+static u32 dmi_base;
+static u16 dmi_len;
+static u16 dmi_num;
+
+static int __init dmi_walk_early(void (*decode)(const struct dmi_header *))
+{
+	u8 *buf;
+
+	buf = dmi_ioremap(dmi_base, dmi_len);
+	if (buf == NULL)
+		return -1;
+
+	dmi_table(buf, dmi_len, dmi_num, decode);
+
+	dmi_iounmap(buf, dmi_len);
 	return 0;
 }
 
@@ -273,9 +283,9 @@ static int __init dmi_present(const char
 
 	memcpy_fromio(buf, p, 15);
 	if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
-		u16 num = (buf[13] << 8) | buf[12];
-		u16 len = (buf[7] << 8) | buf[6];
-		u32 base = (buf[11] << 24) | (buf[10] << 16) |
+		dmi_num = ...
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