SND_PCM_LIB_IOCTL(9)                         PCM API                         SND_PCM_LIB_IOCTL(9)



NAME
       snd_pcm_lib_ioctl - a generic PCM ioctl callback

SYNOPSIS
       int snd_pcm_lib_ioctl(struct snd_pcm_substream * substream, unsigned int cmd, void * arg);

ARGUMENTS
       substream
           the pcm substream instance

       cmd
           ioctl command

       arg
           ioctl argument

DESCRIPTION
       Processes the generic ioctl commands for PCM. Can be passed as the ioctl callback for PCM
       ops.

RETURN
       Zero if successful, or a negative error code on failure.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                      SND_PCM_LIB_IOCTL(9)