[PATCH v5 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/
v4->v5:
 - [MR] Added r-b where provided (thank you!)
 - [NEW][MR] Call cancel_work_sync() for existing workqueue structs
 - [MR] Add cancel for new notoper_work workqueue
 - [MR] Commentary change to definition of crw_lock
 - [EF] Acquire/release crw_lock with irqsave/restore

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     | 21 +++++++
 drivers/s390/cio/vfio_ccw_fsm.c     | 23 ++++---
 drivers/s390/cio/vfio_ccw_ops.c     | 26 ++++++--
 drivers/s390/cio/vfio_ccw_private.h | 10 +++
 8 files changed, 192 insertions(+), 41 deletions(-)

-- 
2.53.0