[alsa-devel] [PATCH v3 4/8] ASoC: soc-pcm: don't use bit-OR'ed error

[Kuninori Morimoto]

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

Current soc-pcm is using bit-OR'ed error

	ret |= snd_soc_component_close(component, substream);
	ret |= snd_soc_component_hw_free(component, substream);

The driver may return arbitrary error codes so they can conflict.
The bit-OR'ed error works only if the return code is always consistent.
This patch fixup it, and use *last* ret value.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
v2 -> v3

	- new patch

sound/soc/soc-pcm.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 7a490c0..8d8ed47 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -498,13 +498,16 @@ static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_component *component;
-	int i, ret = 0;
+	int i, r, ret = 0;
 
 	for_each_rtd_components(rtd, i, component) {
 		if (component == last)
 			break;
 
-		ret |= snd_soc_component_close(component, substream);
+		r = snd_soc_component_close(component, substream);
+		if (r < 0)
+			ret = r; /* use last ret */
+
 		snd_soc_component_module_put_when_close(component);
 	}
 
@@ -798,13 +801,15 @@ static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_component *component;
-	int i, ret = 0;
+	int i, r, ret = 0;
 
 	for_each_rtd_components(rtd, i, component) {
 		if (component == last)
 			break;
 
-		ret |= snd_soc_component_hw_free(component, substream);
+		r = snd_soc_component_hw_free(component, substream);
+		if (r < 0)
+			ret = r; /* use last ret */
 	}
 
 	return ret;
-- 
2.7.4