[PATCH v3 0/8] s390/vfio_ccw fixes

[Eric Farman <farman@linux.ibm.com>]

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@linux.ibm.com/
v2: https://lore.kernel.org/r/20260720201931.976660-1-farman@linux.ibm.com/
v2->v3:
 (Patches 1-4 are unchanged except for these first two items)
 - [FA] Added r-b to patch 1 (thank you!)
 - [sashiko] Fixed typo on error return from ccwchain_handle_ccw()
 - [NEW][sashiko] Fixed the idal size calculated by get_guest_idal()
 - [sashiko] Expanded clamps across region types
 - [sashiko] Replace cp_lock with cp_mutex, and rework intersections with
   the existing sch->lock and private->io_mutex

Eric Farman (8):
  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: implement a channel program mutex
  s390/vfio_ccw: implement a crw lock

 drivers/s390/cio/vfio_ccw_async.c   |  4 ++
 drivers/s390/cio/vfio_ccw_chp.c     | 19 +++++++---
 drivers/s390/cio/vfio_ccw_cp.c      | 59 ++++++++++++++++++++++++-----
 drivers/s390/cio/vfio_ccw_cp.h      |  7 ++++
 drivers/s390/cio/vfio_ccw_drv.c     | 14 ++++++-
 drivers/s390/cio/vfio_ccw_fsm.c     | 22 +++++++----
 drivers/s390/cio/vfio_ccw_ops.c     | 20 +++++++---
 drivers/s390/cio/vfio_ccw_private.h |  5 +++
 8 files changed, 122 insertions(+), 28 deletions(-)

-- 
2.53.0