linux-kernel - [Patch 3/3] firmware: dmi_scan: use full dmi version for SMBIOS3

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Message-Id: <1423647992-3787-4-git-send-email-ivan.khoronzhuk@linaro.org>
Date:	Wed, 11 Feb 2015 11:46:32 +0200
From:	Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
To:	matt.fleming@...el.com, ard.biesheuvel@...aro.org
Cc:	leif.lindholm@...aro.org, linux-kernel@...r.kernel.org,
	Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
Subject: [Patch 3/3] firmware: dmi_scan: use full dmi version for SMBIOS3

New SMBIOS3 spec adds additional field for versioning - docrev.
The docrev identifies the revision of a specification implemented in
the table structures, so display SMBIOS version > 3 in format,
like: 3.22.1

It's not affect on other part of code because version number
is analyzed using comparing, and it's obvious that 0x000208 is less
than 0x030201 for example.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
---
 drivers/firmware/dmi_scan.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 952e95c..e4a2d25 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -17,7 +17,7 @@
  */
 static const char dmi_empty_string[] = "        ";
 
-static u16 __initdata dmi_ver;
+static u32 dmi_ver __initdata;
 static u32 dmi_len;
 static u16 dmi_num;
 /*
@@ -534,7 +534,8 @@ static int __init dmi_smbios3_present(const u8 *buf)
 {
 	if (memcmp(buf, "_SM3_", 5) == 0 &&
 	    buf[6] < 32 && dmi_checksum(buf, buf[6])) {
-		dmi_ver = get_unaligned_be16(buf + 7);
+		dmi_ver = get_unaligned_be32(buf + 6);
+		dmi_ver &= 0xFFFFFF;
 		dmi_len = get_unaligned_le32(buf + 12);
 		dmi_base = get_unaligned_le64(buf + 16);
 		smbios_header_size = buf[6];
@@ -553,8 +554,9 @@ static int __init dmi_smbios3_present(const u8 *buf)
 		dmi_num = dmi_len / 4;
 
 		if (dmi_walk_early(dmi_decode) == 0) {
-			pr_info("SMBIOS %d.%d present.\n",
-				dmi_ver >> 8, dmi_ver & 0xFF);
+			pr_info("SMBIOS %d.%d.%d present.\n",
+				dmi_ver >> 16, (dmi_ver >> 8) & 0xFF,
+				dmi_ver & 0xFF);
 			dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string));
 			pr_debug("DMI: %s\n", dmi_ids_string);
 			return 0;
-- 
1.9.1

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