[SCSI] zfcp: Remove UNIT_REGISTERED status flag

Use the device pointer in zfcp_unit for tracking if we have a
registered SCSI device. With this approach, the flag
ZFCP_STATUS_UNIT_REGISTERED is only redundant and can be removed.

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

4 files changed, 2 insertions, 8 deletions

diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index 285881f07648..683ac4ed5e56 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -72,8 +72,7 @@ static void zfcp_ccw_remove(struct ccw_device *ccw_device)
 
         list_for_each_entry_safe(port, p, &port_remove_lh, list) {
                 list_for_each_entry_safe(unit, u, &unit_remove_lh, list) {
-                        if (atomic_read(&unit->status) &
-                            ZFCP_STATUS_UNIT_REGISTERED)
+                        if (unit->device)
                                 scsi_remove_device(unit->device);
                         zfcp_unit_dequeue(unit);
                 }
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 62f9ee58c9b8..56302a1a4b68 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -255,7 +255,6 @@ enum zfcp_wka_status {
 /* logical unit status */
 #define ZFCP_STATUS_UNIT_SHARED                 0x00000004
 #define ZFCP_STATUS_UNIT_READONLY               0x00000008
-#define ZFCP_STATUS_UNIT_REGISTERED             0x00000010
 #define ZFCP_STATUS_UNIT_SCSI_WORK_PENDING      0x00000020
 
 /* FSF request status (this does not have a common part) */
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index aed08e70aa96..2a00f812779a 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -1250,8 +1250,6 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
         case ZFCP_ERP_ACTION_REOPEN_UNIT:
                 if ((result == ZFCP_ERP_SUCCEEDED) &&
                     !unit->device && port->rport) {
-                        atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED,
-                                        &unit->status);
                         if (!(atomic_read(&unit->status) &
                               ZFCP_STATUS_UNIT_SCSI_WORK_PENDING))
                                 zfcp_erp_schedule_work(unit);
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 9dc42a68fbdd..7829c72d83d0 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -27,7 +27,6 @@ char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
 {
         struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
-        atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status);
         unit->device = NULL;
         zfcp_erp_unit_failed(unit, 12, NULL);
         zfcp_unit_put(unit);
@@ -133,8 +132,7 @@ static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
 
         read_lock_irqsave(&zfcp_data.config_lock, flags);
         unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
-        if (unit &&
-            (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_REGISTERED)) {
+        if (unit) {
                 sdp->hostdata = unit;
                 unit->device = sdp;
                 zfcp_unit_get(unit);