ASoC: soc-pcm: fixup dpcm_be_dai_startup() user count

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@renesas.com>
Link: https://lore.kernel.org/r/87czw9uoav.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 910a6af..626d6e0 100644 (file)
--- 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 @@ unwind:
                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;