centos man page for snd_device_register

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

NAME
       snd_device_register - register the device

SYNOPSIS
       int snd_device_register(struct snd_card * card, void * device_data);

ARGUMENTS
       card
	   the card instance

       device_data
	   the data pointer to register

DESCRIPTION
       Registers the device which was already created via snd_device_new. Usually this is called from snd_card_register, but it can be called
       later if any new devices are created after invocation of snd_card_register.

RETURN
       Zero if successful, or a negative error code on failure or if the device not found.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						    SND_DEVICE_REGISTER(9)