ACPICA: Utilities: Add support to read table from files

[firefly-linux-kernel-4.4.55.git] / drivers / acpi / bus.c

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index cf925c4f36b70ee173ad2ad5a688416cfdb31734..c5bc8cfe09fa6d2beba1c4ac9ea490314f3e08f7 100644 (file)
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -52,6 +52,12 @@ struct proc_dir_entry *acpi_root_dir;
 EXPORT_SYMBOL(acpi_root_dir);
 
 #ifdef CONFIG_X86
+#ifdef CONFIG_ACPI_CUSTOM_DSDT
+static inline int set_copy_dsdt(const struct dmi_system_id *id)
+{
+       return 0;
+}
+#else
 static int set_copy_dsdt(const struct dmi_system_id *id)
 {
        printk(KERN_NOTICE "%s detected - "
@@ -59,6 +65,7 @@ static int set_copy_dsdt(const struct dmi_system_id *id)
        acpi_gbl_copy_dsdt_locally = 1;
        return 0;
 }
+#endif
 
 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
        /*
@@ -132,6 +139,21 @@ void acpi_bus_private_data_handler(acpi_handle handle,
 }
 EXPORT_SYMBOL(acpi_bus_private_data_handler);
 
+int acpi_bus_attach_private_data(acpi_handle handle, void *data)
+{
+       acpi_status status;
+
+       status = acpi_attach_data(handle,
+                       acpi_bus_private_data_handler, data);
+       if (ACPI_FAILURE(status)) {
+               acpi_handle_debug(handle, "Error attaching device data\n");
+               return -ENODEV;
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
+
 int acpi_bus_get_private_data(acpi_handle handle, void **data)
 {
        acpi_status status;
@@ -140,15 +162,20 @@ int acpi_bus_get_private_data(acpi_handle handle, void **data)
                return -EINVAL;
 
        status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
-       if (ACPI_FAILURE(status) || !*data) {
-               ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
-                               handle));
+       if (ACPI_FAILURE(status)) {
+               acpi_handle_debug(handle, "No context for object\n");
                return -ENODEV;
        }
 
        return 0;
 }
-EXPORT_SYMBOL(acpi_bus_get_private_data);
+EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
+
+void acpi_bus_detach_private_data(acpi_handle handle)
+{
+       acpi_detach_data(handle, acpi_bus_private_data_handler);
+}
+EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
 
 void acpi_bus_no_hotplug(acpi_handle handle)
 {
@@ -340,16 +367,18 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
 {
        struct acpi_device *adev;
        struct acpi_driver *driver;
-       acpi_status status;
        u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
+       bool hotplug_event = false;
 
        switch (type) {
        case ACPI_NOTIFY_BUS_CHECK:
                acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
+               hotplug_event = true;
                break;
 
        case ACPI_NOTIFY_DEVICE_CHECK:
                acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
+               hotplug_event = true;
                break;
 
        case ACPI_NOTIFY_DEVICE_WAKE:
@@ -358,6 +387,7 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
 
        case ACPI_NOTIFY_EJECT_REQUEST:
                acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
+               hotplug_event = true;
                break;
 
        case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
@@ -393,16 +423,9 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
            (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
                driver->ops.notify(adev, type);
 
-       switch (type) {
-       case ACPI_NOTIFY_BUS_CHECK:
-       case ACPI_NOTIFY_DEVICE_CHECK:
-       case ACPI_NOTIFY_EJECT_REQUEST:
-               status = acpi_hotplug_schedule(adev, type);
-               if (ACPI_SUCCESS(status))
-                       return;
-       default:
-               break;
-       }
+       if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
+               return;
+
        acpi_bus_put_acpi_device(adev);
        return;
 
@@ -466,6 +489,9 @@ void __init acpi_early_init(void)
 
        printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
 
+       /* It's safe to verify table checksums during late stage */
+       acpi_gbl_verify_table_checksum = TRUE;
+
        /* enable workarounds, unless strict ACPI spec. compliance */
        if (!acpi_strict)
                acpi_gbl_enable_interpreter_slack = TRUE;