[S390] cio: ccw device online store - report rc from ccw driver.

In case the ccw driver refuses to set a device offline, we should
transmit the return code to the caller.

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

1 files changed, 6 insertions, 8 deletions

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 71b3b73e8ebe..9be6dd5a5664 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -457,12 +457,13 @@ int ccw_device_set_online(struct ccw_device *cdev)
         return (ret == 0) ? -ENODEV : ret;
 }
 
-static void online_store_handle_offline(struct ccw_device *cdev)
+static int online_store_handle_offline(struct ccw_device *cdev)
 {
         if (cdev->private->state == DEV_STATE_DISCONNECTED)
                 ccw_device_remove_disconnected(cdev);
-        else if (cdev->drv && cdev->drv->set_offline)
-                ccw_device_set_offline(cdev);
+        else if (cdev->online && cdev->drv && cdev->drv->set_offline)
+                return ccw_device_set_offline(cdev);
+        return 0;
 }
 
 static int online_store_recog_and_online(struct ccw_device *cdev)
@@ -530,13 +531,10 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr,
                 goto out;
         switch (i) {
         case 0:
-                online_store_handle_offline(cdev);
-                ret = count;
+                ret = online_store_handle_offline(cdev);
                 break;
         case 1:
                 ret = online_store_handle_online(cdev, force);
-                if (!ret)
-                        ret = count;
                 break;
         default:
                 ret = -EINVAL;
@@ -545,7 +543,7 @@ out:
         if (cdev->drv)
                 module_put(cdev->drv->owner);
         atomic_set(&cdev->private->onoff, 0);
-        return ret;
+        return (ret < 0) ? ret : count;
 }
 
 static ssize_t