[PATCH v3 6/8] ASoC: soc-pcm: fixup dpcm_be_dai_startup() user count

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

At dpcm_be_dai_startup_unwind(), it indicates error message at (1)
if this function was called with no users.
But, it doesn't use "continue" here. Thus, users will be a
negative number at (2)

	void dpcm_be_dai_startup_unwind(...)
	{
		...
		for_each_dpcm_be(...) {
			...
(1)			if (be->dpcm[stream].users == 0)
				dev_err(...);

(2)			if (--be->dpcm[stream].users != 0)
				continue;

At dpcm_be_dai_startup(), it indicates error message if
user reached to MAX USERS at (A).
But, it doesn't use "continue" here. Thus, it will be over
MAX USERS at (B).

	int dpcm_be_dai_startup(...)
	{
		...
		for_each_dpcm_be(...) {
			...
(A)			if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
				dev_err(...);

(B)			if (be->dpcm[stream].users++ != 0)
				continue;

These are just bug. This patch fixup these.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 sound/soc/soc-pcm.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 910a6afe9f48..626d6e0a3a15 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1432,10 +1432,12 @@ static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
 		struct snd_pcm_substream *be_substream =
 			snd_soc_dpcm_get_substream(be, stream);
 
-		if (be->dpcm[stream].users == 0)
+		if (be->dpcm[stream].users == 0) {
 			dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
 				stream ? "capture" : "playback",
 				be->dpcm[stream].state);
+			continue;
+		}
 
 		if (--be->dpcm[stream].users != 0)
 			continue;
@@ -1472,10 +1474,12 @@ int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
 			continue;
 
 		/* first time the dpcm is open ? */
-		if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
+		if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
 			dev_err(be->dev, "ASoC: too many users %s at open %d\n",
 				stream ? "capture" : "playback",
 				be->dpcm[stream].state);
+			continue;
+		}
 
 		if (be->dpcm[stream].users++ != 0)
 			continue;
@@ -1517,10 +1521,12 @@ int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
 		if (!snd_soc_dpcm_be_can_update(fe, be, stream))
 			continue;
 
-		if (be->dpcm[stream].users == 0)
+		if (be->dpcm[stream].users == 0) {
 			dev_err(be->dev, "ASoC: no users %s at close %d\n",
 				stream ? "capture" : "playback",
 				be->dpcm[stream].state);
+			continue;
+		}
 
 		if (--be->dpcm[stream].users != 0)
 			continue;
-- 
2.25.1