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>

diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h
index 01a905e..23723ce 100644 (file)
--- a/arch/s390/include/asm/ccwgroup.h
+++ b/arch/s390/include/asm/ccwgroup.h
@@ -59,6 +59,9 @@ extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
 int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
                        int num_devices, const char *buf);
 
+extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
+extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);
+
 extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
 extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);
 

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 9c8e117..84846c2 100644 (file)
--- 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,