[PATCH v7 00/10] s390/vfio_ccw fixes

[Eric Farman]

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

Patches 1-6 are identical to v6.
Patches 7-10 are a continued attempt to improve access to private->cp .

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/
v6: https://lore.kernel.org/r/20260726172153.1818056-1-farman@xxxxxxxxxxxxx/
v6->v7:
 - [sashiko/EF] Replace the cp_mutex idea (from v3+) with an expanded use of
   io_mutex (as in v1), but with the workqueue idea for the FSM not-operational
   case that was added in v5

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: selectively expand io_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      | 74 +++++++++++++++++++++--------
 drivers/s390/cio/vfio_ccw_cp.h      | 10 ++++
 drivers/s390/cio/vfio_ccw_drv.c     | 21 +++++++-
 drivers/s390/cio/vfio_ccw_fsm.c     |  8 +++-
 drivers/s390/cio/vfio_ccw_ops.c     | 22 +++++++--
 drivers/s390/cio/vfio_ccw_private.h | 10 +++-
 8 files changed, 159 insertions(+), 33 deletions(-)

-- 
2.53.0