[PATCH v6 00/10] s390/vfio_ccw fixes

[Eric Farman]

This series addresses some pre-existing issues found in the
s390 vfio_ccw (DASD passthrough) driver.

v1: https://lore.kernel.org/r/20260714232208.1683788-1-farman@xxxxxxxxxxxxx/
v2: https://lore.kernel.org/r/20260720201931.976660-1-farman@xxxxxxxxxxxxx/
v3: https://lore.kernel.org/r/20260723174751.1180334-1-farman@xxxxxxxxxxxxx/
v4: https://lore.kernel.org/r/20260725152705.3958100-1-farman@xxxxxxxxxxxxx/
v5: https://lore.kernel.org/r/20260726040129.2946151-1-farman@xxxxxxxxxxxxx/
v5->v6:
 - [sashiko] Add cancel_work_sync() to vfio_ccw_mdev_close_dev() as the "usual"
   cleanup, and keep them in vfio_ccw_mdev_release_dev() to cover corner cases
 - [MR; offlist] Remove the proposed notoper_work queue, and move the cp_free
   from the FSM to vfio_ccw_mdev_close_dev() to ensure we cover the case where
   a device becomes not operational (due to sch_event) while I/O is in flight. 

Eric Farman (10):
  s390/vfio_ccw: free all memory if cp_init() fails
  s390/vfio_ccw: limit the number of channel program segments
  s390/vfio_ccw: fix out of bounds check on CCW array
  s390/vfio_ccw: ensure first IDAW remains constant
  s390/vfio_ccw: calculate idal length based on idaw type
  s390/vfio_ccw: ensure index for read/write regions are within range
  s390/vfio_ccw: cancel existing workqueues
  s390/vfio_ccw: move cp cleanup out of not operational
  s390/vfio_ccw: implement a channel program mutex
  s390/vfio_ccw: implement a crw lock

 drivers/s390/cio/vfio_ccw_async.c   | 16 +++++
 drivers/s390/cio/vfio_ccw_chp.c     | 31 ++++++++--
 drivers/s390/cio/vfio_ccw_cp.c      | 96 ++++++++++++++++++++++-------
 drivers/s390/cio/vfio_ccw_cp.h      | 10 +++
 drivers/s390/cio/vfio_ccw_drv.c     | 10 +++
 drivers/s390/cio/vfio_ccw_fsm.c     | 23 ++++---
 drivers/s390/cio/vfio_ccw_ops.c     | 40 ++++++++++--
 drivers/s390/cio/vfio_ccw_private.h |  7 +++
 8 files changed, 191 insertions(+), 42 deletions(-)

-- 
2.53.0