[PATCH v2 3/4] ASoC: qcom: common: Distinguish missing and invalid TDM slot configuration

[Prasad Kumpatla <prasad.kumpatla@oss.qualcomm.com>]

qcom_snd_parse_dai_tdm_slots() uses -EINVAL for both missing DAI-link
TDM configuration and malformed TDM slot properties. As a result,
qcom_snd_apply_dai_tdm_slots() silently ignores configuration errors.

Return -ENOENT for missing DAI-link configuration and preserve -EINVAL
for malformed TDM slot properties.

Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://sashiko.dev/#/patchset/20260804070307.117119-1-prasad.kumpatla@oss.qualcomm.com
Signed-off-by: Prasad Kumpatla <prasad.kumpatla@oss.qualcomm.com>
---
 sound/soc/qcom/common.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/soc/qcom/common.c b/sound/soc/qcom/common.c
index d231024206db..d9f256d51973 100644
--- a/sound/soc/qcom/common.c
+++ b/sound/soc/qcom/common.c
@@ -103,14 +103,14 @@ static int qcom_snd_parse_dai_tdm_slots(struct snd_soc_pcm_runtime *rtd,
 	int ret;
 
 	if (!link_np)
-		return -EINVAL;
+		return -ENOENT;
 
 	struct device_node *cpu_np __free(device_node) =
 		of_get_child_by_name(link_np, "cpu");
 	struct device_node *codec_np __free(device_node) =
 		of_get_child_by_name(link_np, "codec");
 	if (!cpu_np || !codec_np)
-		return -EINVAL;
+		return -ENOENT;
 
 	ret = qcom_snd_parse_tdm_slot(cpu_np, cpu_cfg);
 	if (ret)
@@ -172,7 +172,7 @@ int qcom_snd_apply_dai_tdm_slots(struct snd_soc_pcm_runtime *rtd)
 
 	ret = qcom_snd_get_dai_tdm_slots(rtd, &cpu_cfg, &codec_cfg);
 	if (ret)
-		return ret == -EINVAL ? 0 : ret;
+		return ret == -ENOENT ? 0 : ret;
 
 	return qcom_snd_apply_dai_tdm_slots_cfg(rtd, &cpu_cfg, &codec_cfg);
 }
-- 
2.34.1