[PULL][SRU Artful] hisi_sas: driver robustness fixes

[dann frazier]

BugLink: https://bugs.launchpad.net/bugs/1739807

This is a set of fixes that landed in the v4.14 & the v4.15 merge
window to address issues
with error recovery. All clean cherry picks, except the last patch,
where conflict resolutions are described in the S-o-B area.

The following changes since commit 8a82ebc79186f7fd22d4166d03e8f5f5b9bcf24f:

  UBUNTU: Ubuntu-4.13.0-22.25 (2017-12-19 08:11:57 -0200)

are available in the Git repository at:

  git://git.launchpad.net/~dannf/ubuntu/+source/linux/+git/linux lp1739807-aa

for you to fetch changes up to 6cdeafe24325e3731f4ef48efcf97b574de6f44a:

  scsi: hisi_sas: complete all tasklets prior to host reset
(2017-12-22 16:22:26 -0700)

----------------------------------------------------------------
Xiang Chen (7):
      scsi: hisi_sas: avoid potential v2 hw interrupt issue
      scsi: hisi_sas: fix v2 hw underflow residual value
      scsi: hisi_sas: add irq and tasklet cleanup in v2 hw
      scsi: hisi_sas: service interrupt ITCT_CLR interrupt in v2 hw
      scsi: hisi_sas: fix internal abort slot timeout bug
      scsi: hisi_sas: us start_phy in PHY_FUNC_LINK_RESET
      scsi: hisi_sas: kill tasklet when destroying irq in v3 hw

Xiaofei Tan (5):
      scsi: hisi_sas: fix reset and port ID refresh issues
      scsi: hisi_sas: add v2 hw DFX feature
      scsi: hisi_sas: fix NULL check in SMP abort task path
      scsi: hisi_sas: fix the risk of freeing slot twice
      scsi: hisi_sas: complete all tasklets prior to host reset

 drivers/scsi/hisi_sas/hisi_sas.h       |   9 +-
 drivers/scsi/hisi_sas/hisi_sas_main.c  | 174 ++++++++++++++++++--------
 drivers/scsi/hisi_sas/hisi_sas_v1_hw.c |   2 +-
 drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 215 +++++++++++++++++----------------
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c |   3 +-
 5 files changed, 245 insertions(+), 158 deletions(-)