linux-kernel - [PATCH 1/2] firmware: dmi: Prevent empty board name from being logged

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Date:   Tue, 6 Jul 2021 07:27:02 +0200 (CEST)
From:   "Maciej W. Rozycki" <macro@...am.me.uk>
To:     Jean Delvare <jdelvare@...e.com>
cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] firmware: dmi: Prevent empty board name from being
 logged

Some systems do provide DMI entries for Base Board Information, however 
the strings supplied are null, e.g:

Legacy DMI 2.0 present.
DMI: /, BIOS 4.51 PG 09/11/97

Do not log the slash along with the empty board name in that case as it 
carries no real information.  If it's important to tell an inexistent 
and an empty board name apart, then all DMI information can be retrieved 
from sysfs and/or with `dmidecode'.

Signed-off-by: Maciej W. Rozycki <macro@...am.me.uk>
---
 drivers/firmware/dmi_scan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-macro-ide-tty/drivers/firmware/dmi_scan.c
===================================================================
--- linux-macro-ide-tty.orig/drivers/firmware/dmi_scan.c
+++ linux-macro-ide-tty/drivers/firmware/dmi_scan.c
@@ -544,7 +544,7 @@ static void __init dmi_format_ids(char *
 			    dmi_get_system_info(DMI_PRODUCT_NAME));

 	board = dmi_get_system_info(DMI_BOARD_NAME);
-	if (board) {
+	if (board && *board) {
 		c += scnprintf(buf + c, len - c, "/");
 		c += print_filtered(buf + c, len - c, board);
 	}