[S390] cio: allow offline processing for disconnected devices

When disconnected ccw devices are removed, the device has to be set
offline, otherwise there will be side effects including a reference
count imbalance. This patch modifies ccw_device_offline to work for
devices in disconnecte/not operational state. ccw_device_offline is
called by cio for devices which are online during device removal.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 550508d..84cc9ea 100644 (file)
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -658,6 +658,13 @@ ccw_device_offline(struct ccw_device *cdev)
 {
        struct subchannel *sch;
 
+       /* Allow ccw_device_offline while disconnected. */
+       if (cdev->private->state == DEV_STATE_DISCONNECTED ||
+           cdev->private->state == DEV_STATE_NOT_OPER) {
+               cdev->private->flags.donotify = 0;
+               ccw_device_done(cdev, DEV_STATE_NOT_OPER);
+               return 0;
+       }
        if (ccw_device_is_orphan(cdev)) {
                ccw_device_done(cdev, DEV_STATE_OFFLINE);
                return 0;