ALSA: pcm.h: add for_each_pcm_streams()

ALSA code has SNDRV_PCM_STREAM_PLAYBACK/CAPTURE everywhere.
Having for_each_xxxx macro is useful.
This patch adds for_each_pcm_streams() for it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/874kvpbotq.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index f657ff0..2628246 100644 (file)
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -644,6 +644,11 @@ void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
 #define snd_pcm_group_for_each_entry(s, substream) \
        list_for_each_entry(s, &substream->group->substreams, link_list)
 
+#define for_each_pcm_streams(stream)                   \
+       for (stream  = SNDRV_PCM_STREAM_PLAYBACK;       \
+            stream <= SNDRV_PCM_STREAM_LAST;           \
+            stream++)
+
 /**
  * snd_pcm_running - Check whether the substream is in a running state
  * @substream: substream to check