snd_card_unref(9) centos man page | unix.com

SND_CARD_UNREF(9)					  Management of Cards and Device					 SND_CARD_UNREF(9)

NAME
       snd_card_unref - release the reference counter

SYNOPSIS
       void snd_card_unref(struct snd_card * card);

ARGUMENTS
       card
	   the card instance

DESCRIPTION
       Decrements the reference counter. When it reaches to zero, wake up the sleeper and call the destructor if needed.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							 SND_CARD_UNREF(9)