We found a NULL pointer dereference in iscsi_sw_tcp_conn_get_param(),
the root reason is we did sysfs addition wrong.

iscsi_create_conn() expose iscsi_cls_conn to sysfs while the related
resources are not initialized. So we should delay the calling of
device_add() until these resources has been initialized.

This patchset solve this issue by correct the add and teardown flow
of iscsi_cls_conn.

-----------
V2:
  add two more iscsi_free_conn() and iscsi_remove_conn() than V1
  change the teardown flow of iscsi_cls_conn

Wenchao Hao (3):
  scsi: iscsi: Add helper functions to manage iscsi_cls_conn
  scsi:libiscsi: Add iscsi_cls_conn to sysfs after been initialized
  scsi:libiscsi: teardown iscsi_cls_conn gracefully

 drivers/scsi/libiscsi.c             | 21 ++++++---
 drivers/scsi/scsi_transport_iscsi.c | 72 +++++++++++++++++++++--------
 include/scsi/scsi_transport_iscsi.h |  5 +-
 3 files changed, 71 insertions(+), 27 deletions(-)

-- 
2.32.0