From: Alexander E. Patrakov <patrakov@gmail.com>
Date: Mon, 1 Sep 2014 19:29:36 +0000 (+0600)
Subject: pcm: fix return value of snd_pcm_share_slave_avail
X-Git-Tag: v1.0.29~53
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=622b1b6bdbb34baca885b65643d4796057574eb7;p=alsa-lib.git

pcm: fix return value of snd_pcm_share_slave_avail

The return value was wrong for playback if slave->hw_ptr was near the
boundary and *pcm->appl.ptr was near zero. The wrong result was greater
than the boundary.

Signed-off-by: Alexander E. Patrakov <patrakov@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/src/pcm/pcm_share.c b/src/pcm/pcm_share.c
index 97705447..c301c7af 100644
--- a/src/pcm/pcm_share.c
+++ b/src/pcm/pcm_share.c
@@ -128,6 +128,8 @@ static snd_pcm_uframes_t snd_pcm_share_slave_avail(snd_pcm_share_slave_t *slave)
 		avail += pcm->buffer_size;
 	if (avail < 0)
 		avail += pcm->boundary;
+	else if ((snd_pcm_uframes_t) avail >= pcm->boundary)
+		avail -= pcm->boundary;
 	return avail;
 }