[PATCH 05/11] ASoC: imx-pcm-rpmsg: Explain component open return value handling

[phucduc.bui at gmail.com]

From: bui duc phuc <phucduc.bui at gmail.com>

Add a comment explaining why .open() must return 0 on success
to ensure proper rollback handling and prevent future changes
from reintroducing the issue.

Reviewed-by: Chancel Liu <chancel.liu at gmail.com>
Signed-off-by: bui duc phuc <phucduc.bui at gmail.com>
---
 sound/soc/fsl/imx-pcm-rpmsg.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/soc/fsl/imx-pcm-rpmsg.c b/sound/soc/fsl/imx-pcm-rpmsg.c
index 30e75fee5175..85b7c929a28a 100644
--- a/sound/soc/fsl/imx-pcm-rpmsg.c
+++ b/sound/soc/fsl/imx-pcm-rpmsg.c
@@ -269,6 +269,12 @@ static int imx_rpmsg_pcm_open(struct snd_soc_component *component,
 	info->stream_timer[substream->stream].substream = substream;
 	timer_setup(&info->stream_timer[substream->stream].timer,
 		    imx_rpmsg_timer_callback, 0);
+
+	/*
+	 * ASoC only marks the component as opened when .open() returns 0.
+	 * Since snd_pcm_hw_constraint_integer() may return 1, explicitly
+	 * return 0 to ensure .close() is not skipped on rollback.
+	 */
 	return 0;
 }
 
-- 
2.43.0