From 28cc099d9ea3962b033cb1cb9c3e07db828d9ff7 Mon Sep 17 00:00:00 2001
From: Jaroslav Kysela <perex@perex.cz>
Date: Sun, 3 Jan 2021 16:41:29 +0100
Subject: [PATCH 25/33] pcm: plugin - optimize sync in snd_pcm_plugin_status()

Do hw_ptr sync only once after the status call. This avoids
double update.

Also, the application pointer must not change when
the status is called. Add assert() call for this condition.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---
 src/pcm/pcm_plugin.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/src/pcm/pcm_plugin.c b/src/pcm/pcm_plugin.c
index 83793397a7f0..6a8151453efb 100644
--- a/src/pcm/pcm_plugin.c
+++ b/src/pcm/pcm_plugin.c
@@ -553,14 +553,11 @@ static int snd_pcm_plugin_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
 	snd_pcm_plugin_t *plugin = pcm->private_data;
 	snd_pcm_sframes_t err;
 
-	/* sync with the latest hw and appl ptrs */
-	snd_pcm_plugin_avail_update(pcm);
-
 	err = snd_pcm_status(plugin->gen.slave, status);
 	if (err < 0)
 		return err;
-	status->appl_ptr = *pcm->appl.ptr;
-	status->hw_ptr = *pcm->hw.ptr;
+	assert(status->appl_ptr == *pcm->appl.ptr);
+	snd_pcm_plugin_sync_hw_ptr(pcm, status->hw_ptr, status->avail);
 	return 0;
 }
 
-- 
2.26.2