ALSA: pcm: Fix interval evaluation with openmin/max

As addressed in alsa-lib (commit b420056604f0), we need to fix the
case where the evaluation of PCM interval "(x x+1]" leading to
-EINVAL.  After applying rules, such an interval may be translated as
"(x x+1)".

Fixes: ff2d6acdf6f1 ("ALSA: pcm: Fix snd_interval_refine first/last with open min/max")
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/include/sound/pcm_params.h b/include/sound/pcm_params.h
index 2dd37cada7c088d7bd6c8b4bd35f18c28c63cc86..888a833d3b003f81f475ef5b695a74739a68c6fe 100644 (file)
--- a/include/sound/pcm_params.h
+++ b/include/sound/pcm_params.h
@@ -254,11 +254,13 @@ static inline int snd_interval_empty(const struct snd_interval *i)
 static inline int snd_interval_single(const struct snd_interval *i)
 {
        return (i->min == i->max || 
-               (i->min + 1 == i->max && i->openmax));
+               (i->min + 1 == i->max && (i->openmin || i->openmax)));
 }
 
 static inline int snd_interval_value(const struct snd_interval *i)
 {
+       if (i->openmin && !i->openmax)
+               return i->max;
        return i->min;
 }