[PATCH v4 00/17] UFS patches for kernel v5.17

[Bart Van Assche <bvanassche@acm.org>]

Hi Martin,

This patch series includes the following changes:
- Fix a deadlock in the UFS error handler.
- Add polling support in the UFS driver.
- Several smaller fixes for the UFS driver.

Please consider these UFS driver kernel patches for kernel v5.17.

Thanks,

Bart.

Changes compared to v3:
- Dropped patch "scsi: core: Fix a race between scsi_done() and
  scsi_times_out()" since the conversation around that patch is still ongoing.
- Added patch "scsi: ufs: Remove hba->cmd_queue".
- Modified patch "scsi: ufs: Optimize the command queueing code".

Changes compared to v2:
- Dropped SCSI core patches that add support for internal commands.
- Reworked patch "Fix a deadlock in the error handler" such that it uses a
  reserved tag as proposed by Adrian.
- Split patch "ufs: Introduce ufshcd_release_scsi_cmd()" into two patches.

Changes compared to v1:
- Add internal command support to the SCSI core.
- Reworked patch "ufs: Optimize the command queueing code".

Bart Van Assche (17):
  scsi: core: Fix scsi_device_max_queue_depth()
  scsi: ufs: Rename a function argument
  scsi: ufs: Remove is_rpmb_wlun()
  scsi: ufs: Remove the sdev_rpmb member
  scsi: ufs: Remove dead code
  scsi: ufs: Fix race conditions related to driver data
  scsi: ufs: Remove ufshcd_any_tag_in_use()
  scsi: ufs: Rework ufshcd_change_queue_depth()
  scsi: ufs: Fix a deadlock in the error handler
  scsi: ufs: Remove hba->cmd_queue
  scsi: ufs: Remove the 'update_scaling' local variable
  scsi: ufs: Introduce ufshcd_release_scsi_cmd()
  scsi: ufs: Improve SCSI abort handling further
  scsi: ufs: Fix a kernel crash during shutdown
  scsi: ufs: Stop using the clock scaling lock in the error handler
  scsi: ufs: Optimize the command queueing code
  scsi: ufs: Implement polling support

 drivers/scsi/scsi.c                |   4 +-
 drivers/scsi/ufs/tc-dwc-g210-pci.c |   1 -
 drivers/scsi/ufs/ufs-exynos.c      |   4 +-
 drivers/scsi/ufs/ufshcd-pci.c      |   2 -
 drivers/scsi/ufs/ufshcd-pltfrm.c   |   2 -
 drivers/scsi/ufs/ufshcd.c          | 300 ++++++++++++++++-------------
 drivers/scsi/ufs/ufshcd.h          |   9 +-
 7 files changed, 174 insertions(+), 148 deletions(-)