2 files changed, 39 insertions, 31 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 3a10d7573477..d53162997f32 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1428,6 +1428,37 @@ static void acpi_init_coherency(struct acpi_device *adev)
         adev->flags.coherent_dma = cca;
 }
 
+static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data)
+{
+        bool *is_spi_i2c_slave_p = data;
+
+        if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
+                return 1;
+
+        /*
+         * devices that are connected to UART still need to be enumerated to
+         * platform bus
+         */
+        if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
+                *is_spi_i2c_slave_p = true;
+
+         /* no need to do more checking */
+        return -1;
+}
+
+static bool acpi_is_spi_i2c_slave(struct acpi_device *device)
+{
+        struct list_head resource_list;
+        bool is_spi_i2c_slave = false;
+
+        INIT_LIST_HEAD(&resource_list);
+        acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave,
+                               &is_spi_i2c_slave);
+        acpi_dev_free_resource_list(&resource_list);
+
+        return is_spi_i2c_slave;
+}
+
 void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
                              int type, unsigned long long sta)
 {
@@ -1443,6 +1474,7 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
         acpi_bus_get_flags(device);
         device->flags.match_driver = false;
         device->flags.initialized = true;
+        device->flags.spi_i2c_slave = acpi_is_spi_i2c_slave(device);
         acpi_device_clear_enumerated(device);
         device_initialize(&device->dev);
         dev_set_uevent_suppress(&device->dev, true);
@@ -1727,38 +1759,13 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
         return AE_OK;
 }
 
-static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data)
-{
-        bool *is_spi_i2c_slave_p = data;
-
-        if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
-                return 1;
-
-        /*
-         * devices that are connected to UART still need to be enumerated to
-         * platform bus
-         */
-        if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
-                *is_spi_i2c_slave_p = true;
-
-         /* no need to do more checking */
-        return -1;
-}
-
 static void acpi_default_enumeration(struct acpi_device *device)
 {
-        struct list_head resource_list;
-        bool is_spi_i2c_slave = false;
-
         /*
          * Do not enumerate SPI/I2C slaves as they will be enumerated by their
          * respective parents.
          */
-        INIT_LIST_HEAD(&resource_list);
-        acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave,
-                               &is_spi_i2c_slave);
-        acpi_dev_free_resource_list(&resource_list);
-        if (!is_spi_i2c_slave) {
+        if (!device->flags.spi_i2c_slave) {
                 acpi_create_platform_device(device, NULL);
                 acpi_device_set_enumerated(device);
         } else {
@@ -1854,7 +1861,7 @@ static void acpi_bus_attach(struct acpi_device *device)
                 return;
 
         device->flags.match_driver = true;
-        if (ret > 0) {
+        if (ret > 0 && !device->flags.spi_i2c_slave) {
                 acpi_device_set_enumerated(device);
                 goto ok;
         }
@@ -1863,10 +1870,10 @@ static void acpi_bus_attach(struct acpi_device *device)
         if (ret < 0)
                 return;
 
-        if (device->pnp.type.platform_id)
-                acpi_default_enumeration(device);
-        else
+        if (!device->pnp.type.platform_id && !device->flags.spi_i2c_slave)
                 acpi_device_set_enumerated(device);
+        else
+                acpi_default_enumeration(device);
 
  ok:
         list_for_each_entry(child, &device->children, node)
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 197f3fffc9a7..408c7820e200 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -210,7 +210,8 @@ struct acpi_device_flags {
         u32 of_compatible_ok:1;
         u32 coherent_dma:1;
         u32 cca_seen:1;
-        u32 reserved:20;
+        u32 spi_i2c_slave:1;
+        u32 reserved:19;
 };
 
 /* File System */