Merge tag 'tegra-for-5.5-cpufreq' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / drivers / acpi / reboot.c

diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c
index 6fa9c2a..ca707f5 100644 (file)
--- a/drivers/acpi/reboot.c
+++ b/drivers/acpi/reboot.c
@@ -4,11 +4,35 @@
 #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;
+       struct pci_bus *bus0;
+
+       /* The reset register can only live on bus 0. */
+       bus0 = pci_find_bus(0, 0);
+       if (!bus0)
+               return;
+       /* Form PCI device/function pair. */
+       devfn = PCI_DEVFN((rr->address >> 32) & 0xffff,
+                         (rr->address >> 16) & 0xffff);
+       pr_debug("Resetting with ACPI PCI RESET_REG.\n");
+       /* Write the value that resets us. */
+       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)
 {
        struct acpi_generic_address *rr;
-       struct pci_bus *bus0;
-       unsigned int devfn;
        u8 reset_value;
 
        if (acpi_disabled)
@@ -33,17 +57,7 @@ void acpi_reboot(void)
         * on a device on bus 0. */
        switch (rr->space_id) {
        case ACPI_ADR_SPACE_PCI_CONFIG:
-               /* The reset register can only live on bus 0. */
-               bus0 = pci_find_bus(0, 0);
-               if (!bus0)
-                       return;
-               /* Form PCI device/function pair. */
-               devfn = PCI_DEVFN((rr->address >> 32) & 0xffff,
-                                 (rr->address >> 16) & 0xffff);
-               printk(KERN_DEBUG "Resetting with ACPI PCI RESET_REG.\n");
-               /* Write the value that resets us. */
-               pci_bus_write_config_byte(bus0, devfn,
-                               (rr->address & 0xffff), reset_value);
+               acpi_pci_reboot(rr, reset_value);
                break;
 
        case ACPI_ADR_SPACE_SYSTEM_MEMORY: