[PATCH 3.19 110/177] iser-target: Fix session hang in case of an rdma read DIF error

From: Greg Kroah-Hartman
Date: Sat May 02 2015 - 16:36:49 EST


3.19-stable review patch. If anyone has any objections, please let me know.

------------------

From: Sagi Grimberg <sagig@xxxxxxxxxxxx>

commit 364189f0ada5478e4faf8a552d6071a650d757cd upstream.

This hang was a result of a missing command put when
a DIF error occurred during a rdma read (and we sent
an CHECK_CONDITION error without passing it to the
backend).

Signed-off-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/infiniband/ulp/isert/ib_isert.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -1848,11 +1848,13 @@ isert_completion_rdma_read(struct iser_t
cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
spin_unlock_bh(&cmd->istate_lock);

- if (ret)
+ if (ret) {
+ target_put_sess_cmd(se_cmd->se_sess, se_cmd);
transport_send_check_condition_and_sense(se_cmd,
se_cmd->pi_err, 0);
- else
+ } else {
target_execute_cmd(se_cmd);
+ }
}

static void


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/