[PATCH for-next 0/5] scsi: hisi_sas/libsas: Fix SATA devices missing issue during hisi_sas_debug_I_T_nexus_reset()

[Jie Zhan]

SATA devices on an expander may be removed and not be found again
when I_T nexus reset and revalidation are processed simultaneously,
which is probable to happen in hisi_sas_clear_nexus_ha().

The issue came up since commit 71453bd9d1bf ("scsi: hisi_sas: Use
sas_ata_wait_after_reset() in IT nexus reset"), where the ex_phy's
change count is updated in hisi_sas_debug_I_T_nexus_reset(), stopping
future revalidation from discovering the SATA devices after link
reset.

This patchset fixes the issue.

Jie Zhan (5):
  Revert "scsi: hisi_sas: Drain bcast events in
    hisi_sas_rescan_topology()"
  Revert "scsi: hisi_sas: Don't send bcast events from HW during nexus
    HA reset"
  scsi: libsas: Add smp_ata_check_ready_type()
  scsi: hisi_sas: Fix SATA devices missing issue during I_T nexus reset
  scsi: libsas: Do not export sas_ata_wait_after_reset()

 drivers/scsi/hisi_sas/hisi_sas_main.c | 31 ++++++++-------------------
 drivers/scsi/libsas/sas_ata.c         | 28 ++++++++++++++++++++++--
 drivers/scsi/libsas/sas_expander.c    |  4 ++--
 drivers/scsi/libsas/sas_internal.h    |  2 ++
 include/scsi/sas_ata.h                |  7 +++---
 5 files changed, 42 insertions(+), 30 deletions(-)

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2.30.0