thinkpad-acpi: fix detection of old ThinkPads
commitc17e0a34397b16b57968028fe362e109937f2f1b
authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Fri, 4 Dec 2009 11:13:24 +0000 (4 09:13 -0200)
committerHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Fri, 4 Dec 2009 11:13:24 +0000 (4 09:13 -0200)
tree9bc4cf5749c35444dadf40ac19f4465a97adfc83
parent44b3dbf1c566478b8c5006e1566b3c0858a2dcb6
thinkpad-acpi: fix detection of old ThinkPads

There is a problem in the quirk tables used by tpacpi_is_fw_known()
and tpacpi_check_outdated_fw(), which causes outdated BIOSes that are
lacking the EC firmware ID DMI field to never match.

This breaks module loading on, e.g. a T23 with outdated BIOS, and the
module will refuse to load unless the "force_load=1" parameter is
given.

Fix the quirk tables so that they can also match the outdated BIOSes,
which in turn will both fix the module loading, and also warn the user
that he is using outdated firmware and should upgrade.

This fixes a serious regression, introduced by commit
e675abafcc0df38125e6e94a9ba91c92fe774f52,
"thinkpad-acpi: be more strict when detecting a ThinkPad".

Tracked by bugzilla #14597.

Reported-by: Paul Kimoto <kimoto@lightlink.com>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Tested-by: Paul Kimoto <kimoto@lightlink.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
drivers/platform/x86/thinkpad_acpi.c