[GIT PULL] firmware: arm_ffa: Fixes for v7.1-rc1(Round 2)

[Sudeep Holla]

Hi ARM SoC Team,

Please pull !

Most of the issues addressed are found by sashiko and other AI agents.
It all started with me missing the report by Sashiko in [1]. Each round of
fix expanded the AI scope of review and unearthed more issues.

Regards,
Sudeep

[1] https://sashiko.dev/#/patchset/20260402113939.930221-1-sebastianene@google.com

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The following changes since commit 254f49634ee16a731174d2ae34bc50bd5f45e731:

  Linux 7.1-rc1 (2026-04-26 14:19:00 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git tags/ffa-fixes-7.1-2

for you to fetch changes up to a6848a50404eefb6f0b131c21881a2d8d21b31a9:

  firmware: arm_ffa: Fix sched-recv callback partition lookup (2026-05-05 16:42:49 +0100)

----------------------------------------------------------------
Arm FF-A fixes for v7.1

The updates fix several robustness issues in the FF-A bus and core driver,
mostly around notification handling, RxTx buffer sizing, firmware-provided
bounds, and cleanup paths.

The notification fixes make per-CPU notification work truly per-CPU, avoid
running per-vCPU notification handling from IPI context, keep RX buffer
release serialized under rx_lock, validate framework notification payload
layout before copying from the shared RX buffer, and avoid dereferencing
notifier entries after they may have been unregistered.

The remaining fixes reject FF-A drivers without an ID table at registration
time, avoid freeing an unallocated RX buffer after allocation failure,
unregister the FF-A v1.0 bus notifier on teardown, bound register-based
PARTITION_INFO_GET descriptor copies, align the stored RxTx buffer size with
the size mapped to firmware, and fix sched-recv callback partition lookup on
the circular partition list.

----------------------------------------------------------------
Sudeep Holla (11):
      firmware: arm_ffa: Check for NULL FF-A ID table while driver registration
      firmware: arm_ffa: Skip free_pages on RX buffer alloc failure
      firmware: arm_ffa: Avoid collapsing NPI work from different CPUs
      firmware: arm_ffa: Fix per-vcpu self notifications handling in workqueue
      firmware: arm_ffa: Unregister bus notifier on teardown for FF-A v1.0
      firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies
      firmware: arm_ffa: Keep framework RX release under lock
      firmware: arm_ffa: Validate framework notification message layout
      firmware: arm_ffa: Align RxTx buffer size before mapping
      firmware: arm_ffa: Snapshot notifier callbacks under lock
      firmware: arm_ffa: Fix sched-recv callback partition lookup

 drivers/firmware/arm_ffa/bus.c    |   4 +-
 drivers/firmware/arm_ffa/driver.c | 144 ++++++++++++++++++++++++++------------
 2 files changed, 104 insertions(+), 44 deletions(-)