IB/iser: centralize setting desc type and done callback

Move this common logic into iser_create_send_desc instead of duplicating
the code.
Reviewed-by: Sergey Gorenko <sergeygo@nvidia.com>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Link: https://lore.kernel.org/r/20230330131333.37900-2-mgurtovoy@nvidia.comReviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/ulp/iser/iser_initiator.c

@@ -141,10 +141,14 @@ static int iser_prepare_write_cmd(struct iscsi_task *task, unsigned int imm_sz,
 
 /* creates a new tx descriptor and adds header regd buffer */
 static void iser_create_send_desc(struct iser_conn *iser_conn,
-				  struct iser_tx_desc *tx_desc)
+		struct iser_tx_desc *tx_desc, enum iser_desc_type type,
+		void (*done)(struct ib_cq *cq, struct ib_wc *wc))
 {
 	struct iser_device *device = iser_conn->ib_conn.device;
 
+	tx_desc->type = type;
+	tx_desc->cqe.done = done;
+
 	ib_dma_sync_single_for_cpu(device->ib_device,
 		tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE);
 
@@ -349,9 +353,8 @@ int iser_send_command(struct iscsi_conn *conn, struct iscsi_task *task)
 	edtl = ntohl(hdr->data_length);
 
 	/* build the tx desc regd header and add it to the tx desc dto */
-	tx_desc->type = ISCSI_TX_SCSI_COMMAND;
-	tx_desc->cqe.done = iser_cmd_comp;
-	iser_create_send_desc(iser_conn, tx_desc);
+	iser_create_send_desc(iser_conn, tx_desc, ISCSI_TX_SCSI_COMMAND,
+			      iser_cmd_comp);
 
 	if (hdr->flags & ISCSI_FLAG_CMD_READ) {
 		data_buf = &iser_task->data[ISER_DIR_IN];
@@ -478,9 +481,8 @@ int iser_send_control(struct iscsi_conn *conn, struct iscsi_task *task)
 	struct iser_device *device;
 
 	/* build the tx desc regd header and add it to the tx desc dto */
-	mdesc->type = ISCSI_TX_CONTROL;
-	mdesc->cqe.done = iser_ctrl_comp;
-	iser_create_send_desc(iser_conn, mdesc);
+	iser_create_send_desc(iser_conn, mdesc, ISCSI_TX_CONTROL,
+			      iser_ctrl_comp);
 
 	device = iser_conn->ib_conn.device;