[SCSI] zfcp: Use kthread API for zfcp erp thread

Switch the creation of the zfcp erp thread from the deprecated
kernel_thread API to the kthread API. This allows also the removal of
some flags in zfcp since the kthread API handles thread creation and
shutdown internally. To allow the usage of the kthread_stop function,
replace the erp ready semaphore with a waitqueue for waiting until erp
actions arrive on the ready queue.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index ed9a8a1517c6..e8f39f02bc3b 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -529,7 +529,7 @@ int zfcp_adapter_enqueue(struct ccw_device *ccw_device)
                 goto generic_services_failed;
 
         init_waitqueue_head(&adapter->remove_wq);
-        init_waitqueue_head(&adapter->erp_thread_wqh);
+        init_waitqueue_head(&adapter->erp_ready_wq);
         init_waitqueue_head(&adapter->erp_done_wqh);
 
         INIT_LIST_HEAD(&adapter->port_list_head);
@@ -541,8 +541,6 @@ int zfcp_adapter_enqueue(struct ccw_device *ccw_device)
         rwlock_init(&adapter->erp_lock);
         rwlock_init(&adapter->abort_lock);
 
-        sema_init(&adapter->erp_ready_sem, 0);
-
         INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
         INIT_WORK(&adapter->scan_work, _zfcp_fc_scan_ports_later);