Provided by: linux-doc-2.6.15_2.6.15-23.39_all bug

NAME
       snd_power_wait - wait until the power-state is changed.


SYNOPSIS
       int snd_power_wait  (snd_card_t * card, unsigned int power_state,
                             struct file * file);


ARGUMENTS
       card   soundcard structure

       power_state
              expected power state

       file   file structure for the O_NONBLOCK check (optional)


DESCRIPTION
       Waits until the power-state is changed.


NOTE
       the power lock must be active before call.