Merge tag 'scmi-fixes-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep...

Arm SCMI fixes for v6.2

Few fixes addressing:
1. Possible compromise with the shorter message size from a misbheaving
   SCMI platform firmware. The shmem accesses are now hardened to handle
   the same in fetch_notification and fetch_response.

2. Possible unsafe locking scenario which is solved by calling
   virtio_break_device() before getting hold of vioch->lock.

3. Possible stale error status reported from a previous message being
   used again as it is not cleared.

* tag 'scmi-fixes-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  firmware: arm_scmi: Fix virtio channels cleanup on shutdown
  firmware: arm_scmi: Harden shared memory access in fetch_notification
  firmware: arm_scmi: Harden shared memory access in fetch_response
  firmware: arm_scmi: Clear stale xfer->hdr.status

Link: https://lore.kernel.org/r/20230106093909.652657-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>