iser-target: Fix isert_put_reject payload buffer post

This patch adds the missing isert_put_reject() logic to post
a outgoing payload buffer to hold the 48 bytes of original PDU
header request payload for the rejected cmd.

It also fixes ISTATE_SEND_REJECT handling in isert_response_completion()
-> isert_do_control_comp() code, and drops incorrect iscsi_cmd_t->reject_comp
usage.

Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: stable@vger.kernel.org  # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 22 insertions, 4 deletions

diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index c48c9481025c..1b38eff7f340 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -1243,6 +1243,9 @@ 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;
                 }
@@ -1339,8 +1342,8 @@ 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");
                 /*
@@ -1366,7 +1369,8 @@ 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) {
                 isert_unmap_tx_desc(tx_desc, ib_dev);
 
                 INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp);
@@ -1658,11 +1662,25 @@ 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->sense_buf_dma = ib_dma_map_single(ib_dev,
+                        (void *)cmd->buf_ptr, ISCSI_HDR_LEN,
+                        DMA_TO_DEVICE);
+        isert_cmd->sense_buf_len = ISCSI_HDR_LEN;
+        tx_dsg->addr    = isert_cmd->sense_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");