[S390] cio: ccw group online store - report rcs to the caller.

In case the ccw group driver refuses to set a device [on|off]line,
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, 8 insertions, 7 deletions

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 918e6fce2573..ec2742813bf2 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -391,27 +391,28 @@ ccwgroup_online_store (struct device *dev, struct device_attribute *attr, const
         unsigned long value;
         int ret;
 
-        gdev = to_ccwgroupdev(dev);
         if (!dev->driver)
-                return count;
+                return -ENODEV;
+
+        gdev = to_ccwgroupdev(dev);
+        gdrv = to_ccwgroupdrv(dev->driver);
 
-        gdrv = to_ccwgroupdrv (gdev->dev.driver);
         if (!try_module_get(gdrv->owner))
                 return -EINVAL;
 
         ret = strict_strtoul(buf, 0, &value);
         if (ret)
                 goto out;
-        ret = count;
+
         if (value == 1)
-                ccwgroup_set_online(gdev);
+                ret = ccwgroup_set_online(gdev);
         else if (value == 0)
-                ccwgroup_set_offline(gdev);
+                ret = ccwgroup_set_offline(gdev);
         else
                 ret = -EINVAL;
 out:
         module_put(gdrv->owner);
-        return ret;
+        return (ret == 0) ? count : ret;
 }
 
 static ssize_t