3 files changed, 245 insertions, 55 deletions

diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index 2693129..3f62041 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -388,6 +388,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
 	init_waitqueue_head(&isert_conn->conn_wait_comp_err);
 	kref_init(&isert_conn->conn_kref);
 	kref_get(&isert_conn->conn_kref);
+	mutex_init(&isert_conn->conn_mutex);
 
 	cma_id->context = isert_conn;
 	isert_conn->conn_cm_id = cma_id;
@@ -540,15 +541,32 @@ isert_disconnect_work(struct work_struct *work)
 				struct isert_conn, conn_logout_work);
 
 	pr_debug("isert_disconnect_work(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
-
+	mutex_lock(&isert_conn->conn_mutex);
 	isert_conn->state = ISER_CONN_DOWN;
 
 	if (isert_conn->post_recv_buf_count == 0 &&
 	    atomic_read(&isert_conn->post_send_buf_count) == 0) {
 		pr_debug("Calling wake_up(&isert_conn->conn_wait);\n");
-		wake_up(&isert_conn->conn_wait);
+		mutex_unlock(&isert_conn->conn_mutex);
+		goto wake_up;
+	}
+	if (!isert_conn->conn_cm_id) {
+		mutex_unlock(&isert_conn->conn_mutex);
+		isert_put_conn(isert_conn);
+		return;
 	}
+	if (!isert_conn->logout_posted) {
+		pr_debug("Calling rdma_disconnect for !logout_posted from"
+			 " isert_disconnect_work\n");
+		rdma_disconnect(isert_conn->conn_cm_id);
+		mutex_unlock(&isert_conn->conn_mutex);
+		iscsit_cause_connection_reinstatement(isert_conn->conn, 0);
+		goto wake_up;
+	}
+	mutex_unlock(&isert_conn->conn_mutex);
 
+wake_up:
+	wake_up(&isert_conn->conn_wait);
 	isert_put_conn(isert_conn);
 }
 
@@ -934,16 +952,11 @@ isert_handle_scsi_cmd(struct isert_conn *isert_conn,
 	}
 
 sequence_cmd:
-	rc = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
+	rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn);
 
 	if (!rc && dump_payload == false && unsol_data)
 		iscsit_set_unsoliticed_dataout(cmd);
 
-	if (rc == CMDSN_ERROR_CANNOT_RECOVER)
-		return iscsit_add_reject_from_cmd(
-			   ISCSI_REASON_PROTOCOL_ERROR,
-			   1, 0, (unsigned char *)hdr, cmd);
-
 	return 0;
 }
 
@@ -1001,17 +1014,71 @@ isert_handle_iscsi_dataout(struct isert_conn *isert_conn,
 }
 
 static int
+isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
+		     struct iser_rx_desc *rx_desc, unsigned char *buf)
+{
+	struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
+	struct iscsi_conn *conn = isert_conn->conn;
+	struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf;
+	int rc;
+
+	rc = iscsit_setup_nop_out(conn, cmd, hdr);
+	if (rc < 0)
+		return rc;
+	/*
+	 * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload
+	 */
+
+	return iscsit_process_nop_out(conn, cmd, hdr);
+}
+
+static int
+isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
+		      struct iser_rx_desc *rx_desc, struct iscsi_text *hdr)
+{
+	struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
+	struct iscsi_conn *conn = isert_conn->conn;
+	u32 payload_length = ntoh24(hdr->dlength);
+	int rc;
+	unsigned char *text_in;
+
+	rc = iscsit_setup_text_cmd(conn, cmd, hdr);
+	if (rc < 0)
+		return rc;
+
+	text_in = kzalloc(payload_length, GFP_KERNEL);
+	if (!text_in) {
+		pr_err("Unable to allocate text_in of payload_length: %u\n",
+		       payload_length);
+		return -ENOMEM;
+	}
+	cmd->text_in_ptr = text_in;
+
+	memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length);
+
+	return iscsit_process_text_cmd(conn, cmd, hdr);
+}
+
+static int
 isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
 		uint32_t read_stag, uint64_t read_va,
 		uint32_t write_stag, uint64_t write_va)
 {
 	struct iscsi_hdr *hdr = &rx_desc->iscsi_header;
 	struct iscsi_conn *conn = isert_conn->conn;
+	struct iscsi_session *sess = conn->sess;
 	struct iscsi_cmd *cmd;
 	struct isert_cmd *isert_cmd;
 	int ret = -EINVAL;
 	u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK);
 
+	if (sess->sess_ops->SessionType &&
+	   (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) {
+		pr_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
+		       " ignoring\n", opcode);
+		return 0;
+	}
+
 	switch (opcode) {
 	case ISCSI_OP_SCSI_CMD:
 		cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
@@ -1032,7 +1099,9 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
 		if (!cmd)
 			break;
 
-		ret = iscsit_handle_nop_out(conn, cmd, (unsigned char *)hdr);
+		isert_cmd = container_of(cmd, struct isert_cmd, iscsi_cmd);
+		ret = isert_handle_nop_out(isert_conn, isert_cmd,
+					   rx_desc, (unsigned char *)hdr);
 		break;
 	case ISCSI_OP_SCSI_DATA_OUT:
 		ret = isert_handle_iscsi_dataout(isert_conn, rx_desc,
@@ -1057,6 +1126,15 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
 						    SECONDS_FOR_LOGOUT_COMP *
 						    HZ);
 		break;
+	case ISCSI_OP_TEXT:
+		cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+		if (!cmd)
+			break;
+
+		isert_cmd = container_of(cmd, struct isert_cmd, iscsi_cmd);
+		ret = isert_handle_text_cmd(isert_conn, isert_cmd,
+					    rx_desc, (struct iscsi_text *)hdr);
+		break;
 	default:
 		pr_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode);
 		dump_stack();
@@ -1184,14 +1262,12 @@ isert_put_cmd(struct isert_cmd *isert_cmd)
 {
 	struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
 	struct isert_conn *isert_conn = isert_cmd->conn;
-	struct iscsi_conn *conn;
+	struct iscsi_conn *conn = isert_conn->conn;
 
 	pr_debug("Entering isert_put_cmd: %p\n", isert_cmd);
 
 	switch (cmd->iscsi_opcode) {
 	case ISCSI_OP_SCSI_CMD:
-		conn = isert_conn->conn;
-
 		spin_lock_bh(&conn->cmd_lock);
 		if (!list_empty(&cmd->i_conn_node))
 			list_del(&cmd->i_conn_node);
@@ -1201,16 +1277,19 @@ isert_put_cmd(struct isert_cmd *isert_cmd)
 			iscsit_stop_dataout_timer(cmd);
 
 		isert_unmap_cmd(isert_cmd, isert_conn);
-		/*
-		 * Fall-through
-		 */
+		transport_generic_free_cmd(&cmd->se_cmd, 0);
+		break;
 	case ISCSI_OP_SCSI_TMFUNC:
+		spin_lock_bh(&conn->cmd_lock);
+		if (!list_empty(&cmd->i_conn_node))
+			list_del(&cmd->i_conn_node);
+		spin_unlock_bh(&conn->cmd_lock);
+
 		transport_generic_free_cmd(&cmd->se_cmd, 0);
 		break;
 	case ISCSI_OP_REJECT:
 	case ISCSI_OP_NOOP_OUT:
-		conn = isert_conn->conn;
-
+	case ISCSI_OP_TEXT:
 		spin_lock_bh(&conn->cmd_lock);
 		if (!list_empty(&cmd->i_conn_node))
 			list_del(&cmd->i_conn_node);
@@ -1222,6 +1301,9 @@ isert_put_cmd(struct isert_cmd *isert_cmd)
 		 * associated cmd->se_cmd needs to be released.
 		 */
 		if (cmd->se_cmd.se_tfo != NULL) {
+			pr_debug("Calling transport_generic_free_cmd from"
+				 " isert_put_cmd for 0x%02x\n",
+				 cmd->iscsi_opcode);
 			transport_generic_free_cmd(&cmd->se_cmd, 0);
 			break;
 		}
@@ -1249,11 +1331,11 @@ static void
 isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd,
 		     struct ib_device *ib_dev)
 {
-	if (isert_cmd->sense_buf_dma != 0) {
-		pr_debug("Calling ib_dma_unmap_single for isert_cmd->sense_buf_dma\n");
-		ib_dma_unmap_single(ib_dev, isert_cmd->sense_buf_dma,
-				    isert_cmd->sense_buf_len, DMA_TO_DEVICE);
-		isert_cmd->sense_buf_dma = 0;
+	if (isert_cmd->pdu_buf_dma != 0) {
+		pr_debug("Calling ib_dma_unmap_single for isert_cmd->pdu_buf_dma\n");
+		ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma,
+				    isert_cmd->pdu_buf_len, DMA_TO_DEVICE);
+		isert_cmd->pdu_buf_dma = 0;
 	}
 
 	isert_unmap_tx_desc(tx_desc, ib_dev);
@@ -1318,8 +1400,8 @@ isert_do_control_comp(struct work_struct *work)
 		atomic_dec(&isert_conn->post_send_buf_count);
 
 		cmd->i_state = ISTATE_SENT_STATUS;
-		complete(&cmd->reject_comp);
 		isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev);
+		break;
 	case ISTATE_SEND_LOGOUTRSP:
 		pr_debug("Calling iscsit_logout_post_handler >>>>>>>>>>>>>>\n");
 		/*
@@ -1329,6 +1411,11 @@ isert_do_control_comp(struct work_struct *work)
 		isert_conn->logout_posted = true;
 		iscsit_logout_post_handler(cmd, cmd->conn);
 		break;
+	case ISTATE_SEND_TEXTRSP:
+		atomic_dec(&isert_conn->post_send_buf_count);
+		cmd->i_state = ISTATE_SENT_STATUS;
+		isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev);
+		break;
 	default:
 		pr_err("Unknown do_control_comp i_state %d\n", cmd->i_state);
 		dump_stack();
@@ -1345,7 +1432,9 @@ isert_response_completion(struct iser_tx_desc *tx_desc,
 	struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
 
 	if (cmd->i_state == ISTATE_SEND_TASKMGTRSP ||
-	    cmd->i_state == ISTATE_SEND_LOGOUTRSP) {
+	    cmd->i_state == ISTATE_SEND_LOGOUTRSP ||
+	    cmd->i_state == ISTATE_SEND_REJECT ||
+	    cmd->i_state == ISTATE_SEND_TEXTRSP) {
 		isert_unmap_tx_desc(tx_desc, ib_dev);
 
 		INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp);
@@ -1419,7 +1508,11 @@ isert_cq_comp_err(struct iser_tx_desc *tx_desc, struct isert_conn *isert_conn)
 		pr_debug("isert_cq_comp_err >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
 		pr_debug("Calling wake_up from isert_cq_comp_err\n");
 
-		isert_conn->state = ISER_CONN_TERMINATING;
+		mutex_lock(&isert_conn->conn_mutex);
+		if (isert_conn->state != ISER_CONN_DOWN)
+			isert_conn->state = ISER_CONN_TERMINATING;
+		mutex_unlock(&isert_conn->conn_mutex);
+
 		wake_up(&isert_conn->conn_wait_comp_err);
 	}
 }
@@ -1445,6 +1538,7 @@ isert_cq_tx_work(struct work_struct *work)
 		} else {
 			pr_debug("TX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
 			pr_debug("TX wc.status: 0x%08x\n", wc.status);
+			pr_debug("TX wc.vendor_err: 0x%08x\n", wc.vendor_err);
 			atomic_dec(&isert_conn->post_send_buf_count);
 			isert_cq_comp_err(tx_desc, isert_conn);
 		}
@@ -1484,9 +1578,11 @@ isert_cq_rx_work(struct work_struct *work)
 			isert_rx_completion(rx_desc, isert_conn, xfer_len);
 		} else {
 			pr_debug("RX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
-			if (wc.status != IB_WC_WR_FLUSH_ERR)
+			if (wc.status != IB_WC_WR_FLUSH_ERR) {
 				pr_debug("RX wc.status: 0x%08x\n", wc.status);
-
+				pr_debug("RX wc.vendor_err: 0x%08x\n",
+					 wc.vendor_err);
+			}
 			isert_conn->post_recv_buf_count--;
 			isert_cq_comp_err(NULL, isert_conn);
 		}
@@ -1543,7 +1639,7 @@ isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
 	    (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) {
 		struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
 		struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1];
-		u32 padding, sense_len;
+		u32 padding, pdu_len;
 
 		put_unaligned_be16(cmd->se_cmd.scsi_sense_length,
 				   cmd->sense_buffer);
@@ -1551,15 +1647,15 @@ isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
 
 		padding = -(cmd->se_cmd.scsi_sense_length) & 3;
 		hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length);
-		sense_len = cmd->se_cmd.scsi_sense_length + padding;
+		pdu_len = cmd->se_cmd.scsi_sense_length + padding;
 
-		isert_cmd->sense_buf_dma = ib_dma_map_single(ib_dev,
-				(void *)cmd->sense_buffer, sense_len,
+		isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev,
+				(void *)cmd->sense_buffer, pdu_len,
 				DMA_TO_DEVICE);
 
-		isert_cmd->sense_buf_len = sense_len;
-		tx_dsg->addr	= isert_cmd->sense_buf_dma;
-		tx_dsg->length	= sense_len;
+		isert_cmd->pdu_buf_len = pdu_len;
+		tx_dsg->addr	= isert_cmd->pdu_buf_dma;
+		tx_dsg->length	= pdu_len;
 		tx_dsg->lkey	= isert_conn->conn_mr->lkey;
 		isert_cmd->tx_desc.num_sge = 2;
 	}
@@ -1637,11 +1733,25 @@ isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
 				struct isert_cmd, iscsi_cmd);
 	struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
 	struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
+	struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
+	struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1];
+	struct iscsi_reject *hdr =
+		(struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header;
 
 	isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
-	iscsit_build_reject(cmd, conn, (struct iscsi_reject *)
-				&isert_cmd->tx_desc.iscsi_header);
+	iscsit_build_reject(cmd, conn, hdr);
 	isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
+
+	hton24(hdr->dlength, ISCSI_HDR_LEN);
+	isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev,
+			(void *)cmd->buf_ptr, ISCSI_HDR_LEN,
+			DMA_TO_DEVICE);
+	isert_cmd->pdu_buf_len = ISCSI_HDR_LEN;
+	tx_dsg->addr	= isert_cmd->pdu_buf_dma;
+	tx_dsg->length	= ISCSI_HDR_LEN;
+	tx_dsg->lkey	= isert_conn->conn_mr->lkey;
+	isert_cmd->tx_desc.num_sge = 2;
+
 	isert_init_send_wr(isert_cmd, send_wr);
 
 	pr_debug("Posting Reject IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
@@ -1650,6 +1760,47 @@ isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
 }
 
 static int
+isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
+{
+	struct isert_cmd *isert_cmd = container_of(cmd,
+				struct isert_cmd, iscsi_cmd);
+	struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
+	struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
+	struct iscsi_text_rsp *hdr =
+		(struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header;
+	u32 txt_rsp_len;
+	int rc;
+
+	isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
+	rc = iscsit_build_text_rsp(cmd, conn, hdr);
+	if (rc < 0)
+		return rc;
+
+	txt_rsp_len = rc;
+	isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
+
+	if (txt_rsp_len) {
+		struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
+		struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1];
+		void *txt_rsp_buf = cmd->buf_ptr;
+
+		isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev,
+				txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE);
+
+		isert_cmd->pdu_buf_len = txt_rsp_len;
+		tx_dsg->addr	= isert_cmd->pdu_buf_dma;
+		tx_dsg->length	= txt_rsp_len;
+		tx_dsg->lkey	= isert_conn->conn_mr->lkey;
+		isert_cmd->tx_desc.num_sge = 2;
+	}
+	isert_init_send_wr(isert_cmd, send_wr);
+
+	pr_debug("Posting Text Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
+
+	return isert_post_response(isert_conn, isert_cmd);
+}
+
+static int
 isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
 		    struct ib_sge *ib_sge, struct ib_send_wr *send_wr,
 		    u32 data_left, u32 offset)
@@ -1947,6 +2098,9 @@ isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
 	case ISTATE_SEND_REJECT:
 		ret = isert_put_reject(cmd, conn);
 		break;
+	case ISTATE_SEND_TEXTRSP:
+		ret = isert_put_text_rsp(cmd, conn);
+		break;
 	case ISTATE_SEND_STATUS:
 		/*
 		 * Special case for sending non GOOD SCSI status from TX thread
@@ -2175,6 +2329,17 @@ isert_free_np(struct iscsi_np *np)
 	kfree(isert_np);
 }
 
+static int isert_check_state(struct isert_conn *isert_conn, int state)
+{
+	int ret;
+
+	mutex_lock(&isert_conn->conn_mutex);
+	ret = (isert_conn->state == state);
+	mutex_unlock(&isert_conn->conn_mutex);
+
+	return ret;
+}
+
 static void isert_free_conn(struct iscsi_conn *conn)
 {
 	struct isert_conn *isert_conn = conn->context;
@@ -2184,26 +2349,43 @@ static void isert_free_conn(struct iscsi_conn *conn)
 	 * Decrement post_send_buf_count for special case when called
 	 * from isert_do_control_comp() -> iscsit_logout_post_handler()
 	 */
+	mutex_lock(&isert_conn->conn_mutex);
 	if (isert_conn->logout_posted)
 		atomic_dec(&isert_conn->post_send_buf_count);
 
-	if (isert_conn->conn_cm_id)
+	if (isert_conn->conn_cm_id && isert_conn->state != ISER_CONN_DOWN) {
+		pr_debug("Calling rdma_disconnect from isert_free_conn\n");
 		rdma_disconnect(isert_conn->conn_cm_id);
+	}
 	/*
 	 * Only wait for conn_wait_comp_err if the isert_conn made it
 	 * into full feature phase..
 	 */
-	if (isert_conn->state > ISER_CONN_INIT) {
+	if (isert_conn->state == ISER_CONN_UP) {
 		pr_debug("isert_free_conn: Before wait_event comp_err %d\n",
 			 isert_conn->state);
+		mutex_unlock(&isert_conn->conn_mutex);
+
 		wait_event(isert_conn->conn_wait_comp_err,
-			   isert_conn->state == ISER_CONN_TERMINATING);
-		pr_debug("isert_free_conn: After wait_event #1 >>>>>>>>>>>>\n");
+			  (isert_check_state(isert_conn, ISER_CONN_TERMINATING)));
+
+		wait_event(isert_conn->conn_wait,
+			  (isert_check_state(isert_conn, ISER_CONN_DOWN)));
+
+		isert_put_conn(isert_conn);
+		return;
+	}
+	if (isert_conn->state == ISER_CONN_INIT) {
+		mutex_unlock(&isert_conn->conn_mutex);
+		isert_put_conn(isert_conn);
+		return;
 	}
+	pr_debug("isert_free_conn: wait_event conn_wait %d\n",
+		 isert_conn->state);
+	mutex_unlock(&isert_conn->conn_mutex);
 
-	pr_debug("isert_free_conn: wait_event conn_wait %d\n", isert_conn->state);
-	wait_event(isert_conn->conn_wait, isert_conn->state == ISER_CONN_DOWN);
-	pr_debug("isert_free_conn: After wait_event #2 >>>>>>>>>>>>>>>>>>>>\n");
+	wait_event(isert_conn->conn_wait,
+		  (isert_check_state(isert_conn, ISER_CONN_DOWN)));
 
 	isert_put_conn(isert_conn);
 }
diff --git a/drivers/infiniband/ulp/isert/ib_isert.h b/drivers/infiniband/ulp/isert/ib_isert.h
index b104f4c..191117b 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.h
+++ b/drivers/infiniband/ulp/isert/ib_isert.h
@@ -61,8 +61,8 @@ struct isert_cmd {
 	uint32_t		write_stag;
 	uint64_t		read_va;
 	uint64_t		write_va;
-	u64			sense_buf_dma;
-	u32			sense_buf_len;
+	u64			pdu_buf_dma;
+	u32			pdu_buf_len;
 	u32			read_va_off;
 	u32			write_va_off;
 	u32			rdma_wr_num;
@@ -102,6 +102,7 @@ struct isert_conn {
 	struct ib_qp		*conn_qp;
 	struct isert_device	*conn_device;
 	struct work_struct	conn_logout_work;
+	struct mutex		conn_mutex;
 	wait_queue_head_t	conn_wait;
 	wait_queue_head_t	conn_wait_comp_err;
 	struct kref		conn_kref;
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index 3f3f041..653ac6b 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -3011,7 +3011,7 @@ static u8 tcm_to_srp_tsk_mgmt_status(const int tcm_mgmt_status)
  * Callback function called by the TCM core. Must not block since it can be
  * invoked on the context of the IB completion handler.
  */
-static int srpt_queue_response(struct se_cmd *cmd)
+static void srpt_queue_response(struct se_cmd *cmd)
 {
 	struct srpt_rdma_ch *ch;
 	struct srpt_send_ioctx *ioctx;
@@ -3022,8 +3022,6 @@ static int srpt_queue_response(struct se_cmd *cmd)
 	int resp_len;
 	u8 srp_tm_status;
 
-	ret = 0;
-
 	ioctx = container_of(cmd, struct srpt_send_ioctx, cmd);
 	ch = ioctx->ch;
 	BUG_ON(!ch);
@@ -3049,7 +3047,7 @@ static int srpt_queue_response(struct se_cmd *cmd)
 		     || WARN_ON_ONCE(state == SRPT_STATE_CMD_RSP_SENT))) {
 		atomic_inc(&ch->req_lim_delta);
 		srpt_abort_cmd(ioctx);
-		goto out;
+		return;
 	}
 
 	dir = ioctx->cmd.data_direction;
@@ -3061,7 +3059,7 @@ static int srpt_queue_response(struct se_cmd *cmd)
 		if (ret) {
 			printk(KERN_ERR "xfer_data failed for tag %llu\n",
 			       ioctx->tag);
-			goto out;
+			return;
 		}
 	}
 
@@ -3082,9 +3080,17 @@ static int srpt_queue_response(struct se_cmd *cmd)
 		srpt_set_cmd_state(ioctx, SRPT_STATE_DONE);
 		target_put_sess_cmd(ioctx->ch->sess, &ioctx->cmd);
 	}
+}
 
-out:
-	return ret;
+static int srpt_queue_data_in(struct se_cmd *cmd)
+{
+	srpt_queue_response(cmd);
+	return 0;
+}
+
+static void srpt_queue_tm_rsp(struct se_cmd *cmd)
+{
+	srpt_queue_response(cmd);
 }
 
 static int srpt_queue_status(struct se_cmd *cmd)
@@ -3097,7 +3103,8 @@ static int srpt_queue_status(struct se_cmd *cmd)
 	    (SCF_TRANSPORT_TASK_SENSE | SCF_EMULATED_TASK_SENSE))
 		WARN_ON(cmd->scsi_status != SAM_STAT_CHECK_CONDITION);
 	ioctx->queue_status_only = true;
-	return srpt_queue_response(cmd);
+	srpt_queue_response(cmd);
+	return 0;
 }
 
 static void srpt_refresh_port_work(struct work_struct *work)
@@ -3930,9 +3937,9 @@ static struct target_core_fabric_ops srpt_template = {
 	.set_default_node_attributes	= srpt_set_default_node_attrs,
 	.get_task_tag			= srpt_get_task_tag,
 	.get_cmd_state			= srpt_get_tcm_cmd_state,
-	.queue_data_in			= srpt_queue_response,
+	.queue_data_in			= srpt_queue_data_in,
 	.queue_status			= srpt_queue_status,
-	.queue_tm_rsp			= srpt_queue_response,
+	.queue_tm_rsp			= srpt_queue_tm_rsp,
 	/*
 	 * Setup function pointers for generic logic in
 	 * target_core_fabric_configfs.c