scsi: be2iscsi: Set and return right iface v4/v6 states

ipv4_iface and ipv6_iface fields need to be set to NULL when destroyed.
Before creation these are checked. Use these to report correct states.
Signed-off-by: NJitendra Bhivare <jitendra.bhivare@broadcom.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/be2iscsi/be_iscsi.c

@@ -292,10 +292,14 @@ void beiscsi_create_def_ifaces(struct beiscsi_hba *phba)
 
 void beiscsi_destroy_def_ifaces(struct beiscsi_hba *phba)
 {
-	if (phba->ipv6_iface)
+	if (phba->ipv6_iface) {
 		iscsi_destroy_iface(phba->ipv6_iface);
-	if (phba->ipv4_iface)
+		phba->ipv6_iface = NULL;
+	}
+	if (phba->ipv4_iface) {
 		iscsi_destroy_iface(phba->ipv4_iface);
+		phba->ipv4_iface = NULL;
+	}
 }
 
 static int
@@ -406,6 +410,14 @@ beiscsi_set_ipv4(struct Scsi_Host *shost,
 
 	/* Check the param */
 	switch (iface_param->param) {
+	case ISCSI_NET_PARAM_IFACE_ENABLE:
+		if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
+			ret = beiscsi_create_ipv4_iface(phba);
+		else {
+			iscsi_destroy_iface(phba->ipv4_iface);
+			phba->ipv4_iface = NULL;
+		}
+		break;
 	case ISCSI_NET_PARAM_IPV4_GW:
 		ret = mgmt_set_gateway(phba, iface_param);
 		break;
@@ -421,12 +433,6 @@ beiscsi_set_ipv4(struct Scsi_Host *shost,
 				    "BS_%d : Invalid BOOTPROTO: %d\n",
 				    iface_param->value[0]);
 		break;
-	case ISCSI_NET_PARAM_IFACE_ENABLE:
-		if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
-			ret = beiscsi_create_ipv4_iface(phba);
-		else
-			iscsi_destroy_iface(phba->ipv4_iface);
-		break;
 	case ISCSI_NET_PARAM_IPV4_SUBNET:
 	case ISCSI_NET_PARAM_IPV4_ADDR:
 		ret = beiscsi_set_static_ip(shost, iface_param,
@@ -459,7 +465,7 @@ beiscsi_set_ipv6(struct Scsi_Host *shost,
 			ret = beiscsi_create_ipv6_iface(phba);
 		else {
 			iscsi_destroy_iface(phba->ipv6_iface);
-			ret = 0;
+			phba->ipv6_iface = NULL;
 		}
 		break;
 	case ISCSI_NET_PARAM_IPV6_ADDR:
@@ -620,7 +626,12 @@ int be2iscsi_iface_get_param(struct iscsi_iface *iface,
 		len = be2iscsi_get_if_param(phba, iface, param, buf);
 		break;
 	case ISCSI_NET_PARAM_IFACE_ENABLE:
-		len = sprintf(buf, "enable\n");
+		if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
+			len = sprintf(buf, "%s\n",
+				      phba->ipv4_iface ? "enable" : "disable");
+		else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
+			len = sprintf(buf, "%s\n",
+				      phba->ipv6_iface ? "enable" : "disable");
 		break;
 	case ISCSI_NET_PARAM_IPV4_GW:
 		memset(&gateway, 0, sizeof(gateway));