Merge tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

[cascardo/linux.git] / drivers / s390 / cio / ccwgroup.c

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 731470e..84846c2 100644 (file)
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -65,10 +65,18 @@ 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 = 0;
+       int ret = -EINVAL;
 
        if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
                return -EAGAIN;
@@ -84,11 +92,20 @@ 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 = 0;
+       int ret = -EINVAL;
 
        if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
                return -EAGAIN;
@@ -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,