snd_lookup_minor_data(9) centos man page | unix.com

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

NAME
       snd_lookup_minor_data - get user data of a registered device

SYNOPSIS
       void * snd_lookup_minor_data(unsigned int minor, int type);

ARGUMENTS
       minor
	   the minor number

       type
	   device type (SNDRV_DEVICE_TYPE_XXX)

DESCRIPTION
       Checks that a minor device with the specified type is registered, and returns its user data pointer.

       This function increments the reference counter of the card instance if an associated instance with the given minor number and type is
       found. The caller must call snd_card_unref appropriately later.

RETURN
       The user data pointer if the specified device is found.	NULL otherwise.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   SND_LOOKUP_MINOR_DAT(9)