[PATCH v2 0/5] platform/x86: wmi: Cleanup obsolete features

[Armin Wolf]

This patch series removes three features deemed obsolete:
- the debug_dump_wdg module param:
  - suffers from garbled output due to pr_cont()
  - functionality is better provided by "fwts wmi"
- the debug_event module param:
  - pr_cont() usage
  - uses the deprecated GUID-based API
  - largely replaced by the ACPI netlink interface
- ioctl interface
  - used only by a single driver, no adoption otherwise
  - numerous design issues

Since the ioctl interface is actually used by userspace programs,
the only user (the dell-smbios-wmi driver) was modified to implement
the necessary pieces itself so that no regressions are expected.

The series depends on
commit cbf54f37600e ("platform/x86: wmi: Skip blocks with zero instances"),
which is currently in the "fixes" tree.

All patches where tested on a Dell Inspiron 3505 and work without
issues.

Changes since v1:
- add Reviewed-by to patches 1, 2 and 5
- drop patch adding the driver development guide
- rework error handling in dell-smbios-wmi

Armin Wolf (5):
  platform/x86: wmi: Remove debug_dump_wdg module param
  platform/x86: wmi: Remove debug_event module param
  platform/x86: dell-smbios-wmi: Use devm_get_free_pages()
  platform/x86: dell-smbios-wmi: Stop using WMI chardev
  platform/x86: wmi: Remove chardev interface

 drivers/platform/x86/dell/dell-smbios-wmi.c | 173 ++++++++----
 drivers/platform/x86/wmi.c                  | 285 +-------------------
 include/linux/wmi.h                         |   8 -
 3 files changed, 132 insertions(+), 334 deletions(-)

--
2.39.2