releases/3.19.7/iser-target-fix-session-hang-in-case-of-an-rdma-read-dif-error.patch

   1 From 364189f0ada5478e4faf8a552d6071a650d757cd Mon Sep 17 00:00:00 2001
   2 From: Sagi Grimberg <sagig@mellanox.com>
   3 Date: Sun, 29 Mar 2015 15:52:03 +0300
   4 Subject: iser-target: Fix session hang in case of an rdma read DIF error
   5
   6 From: Sagi Grimberg <sagig@mellanox.com>
   7
   8 commit 364189f0ada5478e4faf8a552d6071a650d757cd upstream.
   9
  10 This hang was a result of a missing command put when
  11 a DIF error occurred during a rdma read (and we sent
  12 an CHECK_CONDITION error without passing it to the
  13 backend).
  14
  15 Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
  16 Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18
  19 ---
  20  drivers/infiniband/ulp/isert/ib_isert.c |    6 ++++--
  21  1 file changed, 4 insertions(+), 2 deletions(-)
  22
  23 --- a/drivers/infiniband/ulp/isert/ib_isert.c
  24 +++ b/drivers/infiniband/ulp/isert/ib_isert.c
  25 @@ -1848,11 +1848,13 @@ isert_completion_rdma_read(struct iser_t
  26         cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
  27         spin_unlock_bh(&cmd->istate_lock);
  28
  29 -       if (ret)
  30 +       if (ret) {
  31 +               target_put_sess_cmd(se_cmd->se_sess, se_cmd);
  32                 transport_send_check_condition_and_sense(se_cmd,
  33                                                          se_cmd->pi_err, 0);
  34 -       else
  35 +       } else {
  36                 target_execute_cmd(se_cmd);
  37 +       }
  38  }
  39
  40  static void