From 244b2c5ca8b14627e4a17755e5922221e121c771 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 09 Oct 2024 06:15:07 +0000
Subject: [PATCH] change system file
---
kernel/drivers/firmware/efi/efi-bgrt.c | 12 +++++++-----
1 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/kernel/drivers/firmware/efi/efi-bgrt.c b/kernel/drivers/firmware/efi/efi-bgrt.c
index 2bf4d31..6aafdb6 100644
--- a/kernel/drivers/firmware/efi/efi-bgrt.c
+++ b/kernel/drivers/firmware/efi/efi-bgrt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2012 Intel Corporation
* Author: Josh Triplett <josh@joshtriplett.org>
@@ -5,10 +6,6 @@
* Based on the bgrt driver:
* Copyright 2012 Red Hat, Inc <mjg@redhat.com>
* Author: Matthew Garrett
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -45,7 +42,12 @@
return;
}
*bgrt = *(struct acpi_table_bgrt *)table;
- if (bgrt->version != 1) {
+ /*
+ * Only version 1 is defined but some older laptops (seen on Lenovo
+ * Ivy Bridge models) have a correct version 1 BGRT table with the
+ * version set to 0, so we accept version 0 and 1.
+ */
+ if (bgrt->version > 1) {
pr_notice("Ignoring BGRT: invalid version %u (expected 1)\n",
bgrt->version);
goto out;
--
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