tree 317dd539082f7fe26227b1dcf3860433f2e7acfe
parent b525c06cdbd8a3963f0173ccd23f9147d4c384b5
author Henrique de Moraes Holschuh <hmh@hmh.eng.br> 1267307129 -0300
committer Henrique de Moraes Holschuh <hmh@hmh.eng.br> 1267307129 -0300

thinkpad-acpi: fix ALSA callback return status

Clemens Ladisch reports that thinkpad-acpi improperly implements the
ALSA API, and always returns 0 for success for the "put" callbacks
while the API requires it to return "1" when the control value has
been changed in the hardware/firmware.

Rework the volume subdriver to be able to properly implement the ALSA
API.  Based on a patch by Clemens Ladisch <clemens@ladisch.de>.

This fix is also needed on 2.6.33.

Reported-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: stable@kernel.org