From: Shaohua Li <shaohua.li@intel.com>
Date: Thu, 8 Apr 2010 03:16:15 +0000 (+0800)
Subject: ACPI: fix acpi_hest_firmware_first_pci() caused oops
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4bdae98f1a456ea1fea5ea02f9249d23bceab75b;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

ACPI: fix acpi_hest_firmware_first_pci() caused oops

acpi_hest_firmware_first_pci() could be called when acpi is disabled
and cause system oops.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---

diff --git a/drivers/acpi/hest.c b/drivers/acpi/hest.c
index 4bb18c980ac6..1c527a192872 100644
--- a/drivers/acpi/hest.c
+++ b/drivers/acpi/hest.c
@@ -123,6 +123,10 @@ int acpi_hest_firmware_first_pci(struct pci_dev *pci)
 {
 	acpi_status status = AE_NOT_FOUND;
 	struct acpi_table_header *hest = NULL;
+
+	if (acpi_disabled)
+		return 0;
+
 	status = acpi_get_table(ACPI_SIG_HEST, 1, &hest);
 
 	if (ACPI_SUCCESS(status)) {