From 86689776878f0c1aee77604b9c5fce2ffb9ec65e Mon Sep 17 00:00:00 2001
From: Sinan Kaya <okaya@kernel.org>
Date: Wed, 19 Dec 2018 22:46:54 +0000
Subject: [PATCH] ACPI: Allow CONFIG_PCI to be unset for reboot

Make PCI reboot conditional on CONFIG_PCI set on the kernel configuration.

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/reboot.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c
index d642a9dede52..ca707f5b521d 100644
--- a/drivers/acpi/reboot.c
+++ b/drivers/acpi/reboot.c
@@ -4,6 +4,7 @@
 #include <linux/acpi.h>
 #include <acpi/reboot.h>
 
+#ifdef CONFIG_PCI
 static void acpi_pci_reboot(struct acpi_generic_address *rr, u8 reset_value)
 {
 	unsigned int devfn;
@@ -21,6 +22,13 @@ static void acpi_pci_reboot(struct acpi_generic_address *rr, u8 reset_value)
 	pci_bus_write_config_byte(bus0, devfn,
 			(rr->address & 0xffff), reset_value);
 }
+#else
+static inline void acpi_pci_reboot(struct acpi_generic_address *rr,
+				   u8 reset_value)
+{
+	pr_warn_once("PCI configuration space access is not supported\n");
+}
+#endif
 
 void acpi_reboot(void)
 {