ACPI: EC: Fix "no battery" regression

Restore deleted call to register query methods.

http://bugzilla.kernel.org/show_bug.cgi?id=8886

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 2300d81bbc4e..56bee9e065cf 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -652,6 +652,19 @@ static struct acpi_ec *make_acpi_ec(void)
 }
 
 static acpi_status
+acpi_ec_register_query_methods(acpi_handle handle, u32 level,
+                               void *context, void **return_value)
+{
+        struct acpi_namespace_node *node = handle;
+        struct acpi_ec *ec = context;
+        int value = 0;
+        if (sscanf(node->name.ascii, "_Q%x", &value) == 1) {
+                acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);
+        }
+        return AE_OK;
+}
+
+static acpi_status
 ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
 {
         acpi_status status;
@@ -668,6 +681,10 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
         if (ACPI_FAILURE(status))
                 return status;
 
+        /* Find and register all query methods */
+        acpi_walk_namespace(ACPI_TYPE_METHOD, handle, 1,
+                            acpi_ec_register_query_methods, ec, NULL);
+
         /* Use the global lock for all EC transactions? */
         acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock);