[S390] dasd: clean up timer.

Clean up dasd timer when when a dasd device is set offline.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index d0647d1..79ffef6 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -203,6 +203,7 @@
 	rc = dasd_flush_ccw_queue(device, 1);
 	if (rc)
 		return rc;
+	dasd_clear_timer(device);
 
 	DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device);
 	if (device->debug_area != NULL) {