1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index b2b8c18eeced..4d12370337aa 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -952,6 +952,39 @@ static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show,
                    dasd_use_raw_store);
 
 static ssize_t
+dasd_safe_offline_store(struct device *dev, struct device_attribute *attr,
+                        const char *buf, size_t count)
+{
+        struct ccw_device *cdev = to_ccwdev(dev);
+        struct dasd_device *device;
+        int rc;
+
+        device = dasd_device_from_cdev(cdev);
+        if (IS_ERR(device)) {
+                rc = PTR_ERR(device);
+                goto out;
+        }
+
+        if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
+            test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
+                /* Already doing offline processing */
+                dasd_put_device(device);
+                rc = -EBUSY;
+                goto out;
+        }
+
+        set_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags);
+        dasd_put_device(device);
+
+        rc = ccw_device_set_offline(cdev);
+
+out:
+        return rc ? rc : count;
+}
+
+static DEVICE_ATTR(safe_offline, 0200, NULL, dasd_safe_offline_store);
+
+static ssize_t
 dasd_discipline_show(struct device *dev, struct device_attribute *attr,
                      char *buf)
 {
@@ -1320,6 +1353,7 @@ static struct attribute * dasd_attrs[] = {
         &dev_attr_expires.attr,
         &dev_attr_reservation_policy.attr,
         &dev_attr_last_known_reservation_state.attr,
+        &dev_attr_safe_offline.attr,
         NULL,
 };