[SCSI] zfcp: clear boxed flag on unit reopen.

The boxed flag for units was never cleared. This doesn't hurt, but on
ACL updates the error recovery could reopen more units than needed.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/s390/scsi/zfcp_fsf.c

@@ -3043,6 +3043,7 @@ zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
 	queue_designator = &header->fsf_status_qual.fsf_queue_designator;
 
 	atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
+			  ZFCP_STATUS_COMMON_ACCESS_BOXED |
 			  ZFCP_STATUS_UNIT_SHARED |
 			  ZFCP_STATUS_UNIT_READONLY,
 			  &unit->status);