[ALSA] PCM - added back TSTAMP ioctl for PCM (for old alsa-lib binaries)


Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 7fb7c92..2e7b1e6 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -2546,6 +2546,8 @@
 		return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
 	case SNDRV_PCM_IOCTL_INFO:
 		return snd_pcm_info_user(substream, arg);
+	case SNDRV_PCM_IOCTL_TSTAMP:	/* just for compatibility */
+		return 0;
 	case SNDRV_PCM_IOCTL_TTSTAMP:
 		return snd_pcm_tstamp(substream, arg);
 	case SNDRV_PCM_IOCTL_HW_REFINE: