diff options
Diffstat (limited to 'arm64-acpi-ignore-5.1-fadts-reported-as-5.0.patch')
| -rw-r--r-- | arm64-acpi-ignore-5.1-fadts-reported-as-5.0.patch | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/arm64-acpi-ignore-5.1-fadts-reported-as-5.0.patch b/arm64-acpi-ignore-5.1-fadts-reported-as-5.0.patch deleted file mode 100644 index 6cf0ba926..000000000 --- a/arm64-acpi-ignore-5.1-fadts-reported-as-5.0.patch +++ /dev/null @@ -1,41 +0,0 @@ -From a7edc17544709d20f800dc0898096365a3d68613 Mon Sep 17 00:00:00 2001 -From: Ard Biesheuvel <ard.biesheuvel@linaro.org> -Date: Sun, 2 Jun 2019 16:36:15 +0200 -Subject: [PATCH] acpi/arm64: ignore 5.1 FADTs that are reported as 5.0 - -Some Qualcomm Snapdragon based laptops built to run Microsoft Windows -are clearly ACPI 5.1 based, given that that is the first ACPI revision -that supports ARM, and introduced the FADT 'arm_boot_flags' field, -which has a non-zero field on those systems. - -So in these cases, infer from the ARM boot flags that the FADT must be -5.1 or later, and treat it as 5.1. - -Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> ---- - arch/arm64/kernel/acpi.c | 10 +++++++--- - 1 file changed, 7 insertions(+), 3 deletions(-) - -diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c -index 803f0494dd3e3..7722e85fb69c3 100644 ---- a/arch/arm64/kernel/acpi.c -+++ b/arch/arm64/kernel/acpi.c -@@ -155,10 +155,14 @@ static int __init acpi_fadt_sanity_check(void) - */ - if (table->revision < 5 || - (table->revision == 5 && fadt->minor_revision < 1)) { -- pr_err("Unsupported FADT revision %d.%d, should be 5.1+\n", -+ pr_err(FW_BUG "Unsupported FADT revision %d.%d, should be 5.1+\n", - table->revision, fadt->minor_revision); -- ret = -EINVAL; -- goto out; -+ -+ if (!fadt->arm_boot_flags) { -+ ret = -EINVAL; -+ goto out; -+ } -+ pr_err("FADT has ARM boot flags set, assuming 5.1\n"); - } - - if (!(fadt->flags & ACPI_FADT_HW_REDUCED)) { - |