[PATCH] pcm: rate - check rate type for using snd_pcm_rate_slave_frames

[Shengjiu Wang]

With plughw device and mmap case, the plug pcm fast_ops pointer is same
as slave pcm fast_ops, but ops pointer is different, which cause
the "bus error" in snd_pcm_rate_slave_frames.

The test command is
arecord -Dplughw:x -r12000 -c2 -fS16_LE -M temp.wav

This patch is to add pcm type check as commit:
d21e0e01 pcm: plugin - fix avail_min calculation on rate plugin

Fixes: d9dbb57b ("pcm: rate - rewrite the may_wait_for_avail_min callback for the rate plugin")
Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
---
 src/pcm/pcm_rate.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/pcm/pcm_rate.c b/src/pcm/pcm_rate.c
index e8815e8b..dc502202 100644
--- a/src/pcm/pcm_rate.c
+++ b/src/pcm/pcm_rate.c
@@ -1304,8 +1304,11 @@ static snd_pcm_uframes_t snd_pcm_rate_slave_frames(snd_pcm_t *pcm, snd_pcm_ufram
 static int snd_pcm_rate_may_wait_for_avail_min(snd_pcm_t *pcm,
 					       snd_pcm_uframes_t avail)
 {
-	return snd_pcm_plugin_may_wait_for_avail_min_conv(pcm, avail,
-							  snd_pcm_rate_slave_frames);
+	if (snd_pcm_type(pcm) == SND_PCM_TYPE_RATE)
+		return snd_pcm_plugin_may_wait_for_avail_min_conv(pcm, avail,
+								  snd_pcm_rate_slave_frames);
+	else
+		return snd_pcm_plugin_may_wait_for_avail_min_conv(pcm, avail, NULL);
 }
 
 static const snd_pcm_fast_ops_t snd_pcm_rate_fast_ops = {
-- 
2.34.1