| #ifndef __BACKPORT_SOUND_PCM_H |
| #define __BACKPORT_SOUND_PCM_H |
| #include_next <sound/pcm.h> |
| #include <linux/version.h> |
| |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0) |
| /** |
| * snd_pcm_stop_xrun - stop the running streams as XRUN |
| * @substream: the PCM substream instance |
| * |
| * This stops the given running substream (and all linked substreams) as XRUN. |
| * Unlike snd_pcm_stop(), this function takes the substream lock by itself. |
| * |
| * Return: Zero if successful, or a negative error code. |
| */ |
| static inline int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) |
| { |
| unsigned long flags; |
| int ret = 0; |
| |
| snd_pcm_stream_lock_irqsave(substream, flags); |
| if (snd_pcm_running(substream)) |
| ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
| snd_pcm_stream_unlock_irqrestore(substream, flags); |
| return ret; |
| } |
| #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0) */ |
| |
| #endif /* __BACKPORT_SOUND_PCM_H */ |
