Merge tag 'migration-20240331-pull-request' of https://gitlab.com/peterx/qemu into...

Merge tag 'migration-20240331-pull-request' of https://gitlab.com/peterx/qemu into staging

Migration pull for 9.0-rc2

- Avihai's two fixes on error paths

# -----BEGIN PGP SIGNATURE-----
#
# iIgEABYKADAWIQS5GE3CDMRX2s990ak7X8zN86vXBgUCZgmsOxIccGV0ZXJ4QHJl
# ZGhhdC5jb20ACgkQO1/MzfOr1waYKQD9G/B4c5u94Puhkr4o+K4M3FZ3J1pSpYRd
# nMAlrCWYLHQBAKV5q8DvgXbRNzT/Q+1UX7psxIsjyaqljxyJoZ+dIgAD
# =hucV
# -----END PGP SIGNATURE-----
# gpg: Signature made Sun 31 Mar 2024 19:32:27 BST
# gpg:                using EDDSA key B9184DC20CC457DACF7DD1A93B5FCCCDF3ABD706
# gpg:                issuer "peterx@redhat.com"
# gpg: Good signature from "Peter Xu <xzpeter@gmail.com>" [marginal]
# gpg:                 aka "Peter Xu <peterx@redhat.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: B918 4DC2 0CC4 57DA CF7D  D1A9 3B5F CCCD F3AB D706

* tag 'migration-20240331-pull-request' of https://gitlab.com/peterx/qemu:
  migration/postcopy: Ensure postcopy_start() sets errp if it fails
  migration: Set migration error in migration_completion()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>