s390/ccwgroup: allow drivers to call set_{on,off}line

Allow drivers to enable/disable ccwgroup devices.

Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 20 insertions, 2 deletions

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 9c8e117c7d3a..84846c2b96d3 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -65,7 +65,15 @@ static void __ccwgroup_remove_cdev_refs(struct ccwgroup_device *gdev)
         }
 }
 
-static int ccwgroup_set_online(struct ccwgroup_device *gdev)
+/**
+ * ccwgroup_set_online() - enable a ccwgroup device
+ * @gdev: target ccwgroup device
+ *
+ * This function attempts to put the ccwgroup device into the online state.
+ * Returns:
+ *  %0 on success and a negative error value on failure.
+ */
+int ccwgroup_set_online(struct ccwgroup_device *gdev)
 {
         struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
         int ret = -EINVAL;
@@ -84,8 +92,17 @@ out:
         atomic_set(&gdev->onoff, 0);
         return ret;
 }
+EXPORT_SYMBOL(ccwgroup_set_online);
 
-static int ccwgroup_set_offline(struct ccwgroup_device *gdev)
+/**
+ * ccwgroup_set_offline() - disable a ccwgroup device
+ * @gdev: target ccwgroup device
+ *
+ * This function attempts to put the ccwgroup device into the offline state.
+ * Returns:
+ *  %0 on success and a negative error value on failure.
+ */
+int ccwgroup_set_offline(struct ccwgroup_device *gdev)
 {
         struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
         int ret = -EINVAL;
@@ -104,6 +121,7 @@ out:
         atomic_set(&gdev->onoff, 0);
         return ret;
 }
+EXPORT_SYMBOL(ccwgroup_set_offline);
 
 static ssize_t ccwgroup_online_store(struct device *dev,
                                      struct device_attribute *attr,