scsi: target: iscsi: Remove the iscsi_data_count structure

This patch removes the iscsi_data_count structure and the
iscsit_do_rx_data() function because they are used only by rx_data()

Link: https://lore.kernel.org/r/20200424113913.17237-1-mlombard@redhat.comReviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/target/iscsi/iscsi_target_util.c

@@ -1228,18 +1228,20 @@ void iscsit_print_session_params(struct iscsi_session *sess)
 	iscsi_dump_sess_ops(sess->sess_ops);
 }
 
-static int iscsit_do_rx_data(
+int rx_data(
 	struct iscsi_conn *conn,
-	struct iscsi_data_count *count)
+	struct kvec *iov,
+	int iov_count,
+	int data)
 {
-	int data = count->data_length, rx_loop = 0, total_rx = 0;
+	int rx_loop = 0, total_rx = 0;
 	struct msghdr msg;
 
 	if (!conn || !conn->sock || !conn->conn_ops)
 		return -1;
 
 	memset(&msg, 0, sizeof(struct msghdr));
-	iov_iter_kvec(&msg.msg_iter, READ, count->iov, count->iov_count, data);
+	iov_iter_kvec(&msg.msg_iter, READ, iov, iov_count, data);
 
 	while (msg_data_left(&msg)) {
 		rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL);
@@ -1256,26 +1258,6 @@ static int iscsit_do_rx_data(
 	return total_rx;
 }
 
-int rx_data(
-	struct iscsi_conn *conn,
-	struct kvec *iov,
-	int iov_count,
-	int data)
-{
-	struct iscsi_data_count c;
-
-	if (!conn || !conn->sock || !conn->conn_ops)
-		return -1;
-
-	memset(&c, 0, sizeof(struct iscsi_data_count));
-	c.iov = iov;
-	c.iov_count = iov_count;
-	c.data_length = data;
-	c.type = ISCSI_RX_DATA;
-
-	return iscsit_do_rx_data(conn, &c);
-}
-
 int tx_data(
 	struct iscsi_conn *conn,
 	struct kvec *iov,

include/target/iscsi/iscsi_target_core.h

@@ -301,16 +301,6 @@ struct iscsi_queue_req {
 	struct list_head	qr_list;
 };
 
-struct iscsi_data_count {
-	int			data_length;
-	int			sync_and_steering;
-	enum data_count_type	type;
-	u32			iov_count;
-	u32			ss_iov_count;
-	u32			ss_marker_count;
-	struct kvec		*iov;
-};
-
 struct iscsi_param_list {
 	bool			iser;
 	struct list_head	param_list;