[S390] qdio: remove the module_get & module_put pair

Increasing the qdio reference count for every used subchannel
is unnecessary since unloading qdio (if build as a module) is
only possible if other modules that use qdio are unloaded.
Unloading modules that use qdio in turn requires that these
modules shut down all qdio subchannels. Therefore the additional
module_get reference is not needed.
Signed-off-by: NJan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/qdio_main.c

@@ -1251,7 +1251,6 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
 
 	qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
 	mutex_unlock(&irq_ptr->setup_mutex);
-	module_put(THIS_MODULE);
 	if (rc)
 		return rc;
 	return 0;
@@ -1399,9 +1398,6 @@ int qdio_establish(struct qdio_initialize *init_data)
 	if (cdev->private->state != DEV_STATE_ONLINE)
 		return -EINVAL;
 
-	if (!try_module_get(THIS_MODULE))
-		return -EINVAL;
-
 	mutex_lock(&irq_ptr->setup_mutex);
 	qdio_setup_irq(init_data);