[S390] cio: Clean up online_store.

Detangle the online_store code and make it more readable.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 62 insertions, 47 deletions

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index e322111fb369..c3fc205e3bc0 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -413,11 +413,60 @@ ccw_device_set_online(struct ccw_device *cdev)
         return (ret == 0) ? -ENODEV : ret;
 }
 
-static ssize_t
-online_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+static void 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);
+}
+
+static int online_store_recog_and_online(struct ccw_device *cdev)
+{
+        int ret;
+
+        /* Do device recognition, if needed. */
+        if (cdev->id.cu_type == 0) {
+                ret = ccw_device_recognition(cdev);
+                if (ret) {
+                        printk(KERN_WARNING"Couldn't start recognition "
+                               "for device %s (ret=%d)\n",
+                               cdev->dev.bus_id, ret);
+                        return ret;
+                }
+                wait_event(cdev->private->wait_q,
+                           cdev->private->flags.recog_done);
+        }
+        if (cdev->drv && cdev->drv->set_online)
+                ccw_device_set_online(cdev);
+        return 0;
+}
+static void online_store_handle_online(struct ccw_device *cdev, int force)
+{
+        int ret;
+
+        ret = online_store_recog_and_online(cdev);
+        if (ret)
+                return;
+        if (force && cdev->private->state == DEV_STATE_BOXED) {
+                ret = ccw_device_stlck(cdev);
+                if (ret) {
+                        printk(KERN_WARNING"ccw_device_stlck for device %s "
+                               "returned %d!\n", cdev->dev.bus_id, ret);
+                        return;
+                }
+                if (cdev->id.cu_type == 0)
+                        cdev->private->state = DEV_STATE_NOT_OPER;
+                online_store_recog_and_online(cdev);
+        }
+
+}
+
+static ssize_t online_store (struct device *dev, struct device_attribute *attr,
+                             const char *buf, size_t count)
 {
         struct ccw_device *cdev = to_ccwdev(dev);
-        int i, force, ret;
+        int i, force;
         char *tmp;
 
         if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
@@ -434,51 +483,17 @@ online_store (struct device *dev, struct device_attribute *attr, const char *buf
                 force = 0;
                 i = simple_strtoul(buf, &tmp, 16);
         }
-        if (i == 1) {
-                /* Do device recognition, if needed. */
-                if (cdev->id.cu_type == 0) {
-                        ret = ccw_device_recognition(cdev);
-                        if (ret) {
-                                printk(KERN_WARNING"Couldn't start recognition "
-                                       "for device %s (ret=%d)\n",
-                                       cdev->dev.bus_id, ret);
-                                goto out;
-                        }
-                        wait_event(cdev->private->wait_q,
-                                   cdev->private->flags.recog_done);
-                }
-                if (cdev->drv && cdev->drv->set_online)
-                        ccw_device_set_online(cdev);
-        } else if (i == 0) {
-                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);
-        }
-        if (force && cdev->private->state == DEV_STATE_BOXED) {
-                ret = ccw_device_stlck(cdev);
-                if (ret) {
-                        printk(KERN_WARNING"ccw_device_stlck for device %s "
-                               "returned %d!\n", cdev->dev.bus_id, ret);
-                        goto out;
-                }
-                /* Do device recognition, if needed. */
-                if (cdev->id.cu_type == 0) {
-                        cdev->private->state = DEV_STATE_NOT_OPER;
-                        ret = ccw_device_recognition(cdev);
-                        if (ret) {
-                                printk(KERN_WARNING"Couldn't start recognition "
-                                       "for device %s (ret=%d)\n",
-                                       cdev->dev.bus_id, ret);
-                                goto out;
-                        }
-                        wait_event(cdev->private->wait_q,
-                                   cdev->private->flags.recog_done);
-                }
-                if (cdev->drv && cdev->drv->set_online)
-                        ccw_device_set_online(cdev);
+
+        switch (i) {
+        case 0:
+                online_store_handle_offline(cdev);
+                break;
+        case 1:
+                online_store_handle_online(cdev, force);
+                break;
+        default:
+                count = -EINVAL;
         }
-        out:
         if (cdev->drv)
                 module_put(cdev->drv->owner);
         atomic_set(&cdev->private->onoff, 0);