1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index bdaad5535e22..9cd789b8acd4 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -1748,4 +1748,25 @@ zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par)
         return ret;
 }
 
+/**
+ * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields
+ * into zfcp_port structure
+ * @port: zfcp_port structure
+ * @plogi: plogi payload
+ */
+void
+zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
+{
+        port->maxframe_size = plogi->serv_param.common_serv_param[7] |
+                ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8);
+        if (plogi->serv_param.class1_serv_param[0] & 0x80)
+                port->supported_classes |= FC_COS_CLASS1;
+        if (plogi->serv_param.class2_serv_param[0] & 0x80)
+                port->supported_classes |= FC_COS_CLASS2;
+        if (plogi->serv_param.class3_serv_param[0] & 0x80)
+                port->supported_classes |= FC_COS_CLASS3;
+        if (plogi->serv_param.class4_serv_param[0] & 0x80)
+                port->supported_classes |= FC_COS_CLASS4;
+}
+
 #undef ZFCP_LOG_AREA