Turns out we have a few drivers that get the tear down ordering wrong
also when not using device managed registration (cf. [1] and [2]).

Fix this to avoid issues like system errors due to unclocked accesses,
NULL-pointer dereferences, hangs or failed I/O during during
deregistration (e.g. when powering down devices).

Johan


[1] https://lore.kernel.org/lkml/20260409120419.388546-2-johan@kernel.org/
[2] https://lore.kernel.org/lkml/20260410081757.503099-1-johan@kernel.org/


Johan Hovold (8):
  spi: cadence: fix controller deregistration
  spi: cadence-quadspi: fix controller deregistration
  spi: mpc52xx: fix controller deregistration
  spi: mpc52xx: fix use-after-free on unbind
  spi: mxic: fix controller deregistration
  spi: orion: fix controller deregistration
  spi: topcliff-pch: fix controller deregistration
  spi: topcliff-pch: fix use-after-free on unbind

 drivers/spi/spi-cadence-quadspi.c |  4 ++--
 drivers/spi/spi-cadence.c         |  6 +++++-
 drivers/spi/spi-mpc52xx.c         |  6 ++++--
 drivers/spi/spi-mxic.c            |  3 ++-
 drivers/spi/spi-orion.c           |  7 ++++++-
 drivers/spi/spi-topcliff-pch.c    | 11 ++++++++---
 6 files changed, 27 insertions(+), 10 deletions(-)

-- 
2.52.0

On Tue, 14 Apr 2026 15:43:11 +0200, Johan Hovold wrote:
> spi: fix explicit controller deregistration
> 
> Turns out we have a few drivers that get the tear down ordering wrong
> also when not using device managed registration (cf. [1] and [2]).
> 
> Fix this to avoid issues like system errors due to unclocked accesses,
> NULL-pointer dereferences, hangs or failed I/O during during
> deregistration (e.g. when powering down devices).
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-7.1

Thanks!

[1/8] spi: cadence: fix controller deregistration
      https://git.kernel.org/broonie/spi/c/666fa7e9ca98
[2/8] spi: cadence-quadspi: fix controller deregistration
      https://git.kernel.org/broonie/spi/c/964ee9793760
[3/8] spi: mpc52xx: fix controller deregistration
      https://git.kernel.org/broonie/spi/c/0f997fdae819
[4/8] spi: mpc52xx: fix use-after-free on unbind
      https://git.kernel.org/broonie/spi/c/706b3dc2ac7a
[5/8] spi: mxic: fix controller deregistration
      https://git.kernel.org/broonie/spi/c/adbc595e2720
[6/8] spi: orion: fix controller deregistration
      https://git.kernel.org/broonie/spi/c/220f4f11104a
[7/8] spi: topcliff-pch: fix controller deregistration
      https://git.kernel.org/broonie/spi/c/5d6f477d6fc0
[8/8] spi: topcliff-pch: fix use-after-free on unbind
      https://git.kernel.org/broonie/spi/c/9d72732fe70c

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark