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thinkpad-acpi: disable broken bay and dock subdrivers 

Currently, the ThinkPad-ACPI bay and dock drivers are completely
broken, and cause a NULL pointer derreference in kernel mode (and,
therefore, an OOPS) when they try to issue events (i.e. on dock,
undock, bay ejection, etc).

OTOH, the standard ACPI dock driver can handle the hotplug bays and
docks of the ThinkPads just fine (including batteries) as of 2.6.27.
In fact, it does a much better job of it than thinkpad-acpi ever did.

It is just not worth the hassle to find a way to fix this crap without
breaking the (deprecated) thinkpad-acpi dock/bay ABI.  This is old,
deprecated code that sees little testing or use.

As a quick fix suitable for -stable backports, mark the thinkpad-acpi
bay and dock subdrivers as BROKEN in Kconfig.  The dead code will be
removed by a later patch.

This fixes bugzilla #13669, and should be applied to 2.6.27 and later.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Reported-by: Joerg Platte <jplatte@naasa.net>
Cc: stable@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
wifi-calibration
Henrique de Moraes Holschuh 2009-08-01 12:04:17 -03:00 committed by Len Brown
parent ed680c4ad4
commit 550e7fd8af
1 changed files with 3 additions and 1 deletions
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4
drivers/platform/x86/Kconfig
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@ -281,6 +281,7 @@ config THINKPAD_ACPI_DOCK
bool "Legacy Docking Station Support"
depends on THINKPAD_ACPI
depends on ACPI_DOCK=n
depends on BROKEN
default n
---help---
Allows the thinkpad_acpi driver to handle docking station events.
@ -294,7 +295,8 @@ config THINKPAD_ACPI_DOCK
config THINKPAD_ACPI_BAY
bool "Legacy Removable Bay Support"
depends on THINKPAD_ACPI
default y
depends on BROKEN
default n
---help---
Allows the thinkpad_acpi driver to handle removable bays. It will
electrically disable the device in the bay, and also generate