[PATCH 0/5] platform/x86: dell: dcdbas: Fix SMI completion wait and buffer handling

[Rosen Penev <rosenp@gmail.com>]

Fixes for dcdbas.

Patch 1 fixes the host control SMI wait for types 2 and 3, which the
compiler removed entirely because the status was a plain memory read.
Patches 2 and 3 fix the SMI buffer lifetime on unbind and module
removal. Patch 4 validates the firmware-provided WSMT buffer
description. Patch 5 converts the type 1 wait to
read_poll_timeout_atomic() as well.

These patches were developed with the help of an AI coding assistant
(Claude Opus 5.5): it reviewed the drivers, found the issues and drafted
the fixes and changelogs. I reviewed every change and I am responsible
for them.

All patches build cleanly with W=1.

Tested on a Dell Precision M4800 running v7.2.15, using the equivalent
backports built as out-of-tree modules:
the driver probes, and growing smi_data_buf_size and then unloading and
reloading dcdbas with dell-smbios on top is clean, with the buffer freed
on remove. The host control SMI (only used at power-off) and the WSMT
paths were not exercised.


Rosen Penev (5):
  platform/x86: dell: dcdbas: Actually wait for the host control SMI
  platform/x86: dell: dcdbas: Suppress bind attributes of the platform
    driver
  platform/x86: dell: dcdbas: Release the SMI buffer in remove
  platform/x86: dell: dcdbas: Validate the WSMT buffer description
  platform/x86: dell: dcdbas: Use read_poll_timeout_atomic() for the
    type 1 SMI

 drivers/platform/x86/dell/dcdbas.c | 80 ++++++++++++++++++------------
 drivers/platform/x86/dell/dcdbas.h |  1 -
 2 files changed, 49 insertions(+), 32 deletions(-)


base-commit: 2800868f63227c8237d70c41e70d441c919620d6
-- 
2.56.0