[PATCH] ASoC: audio-graph-card2: fix index check on graph_parse_node_multi_nm()

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
To: Mark Brown <broonie@kernel.org>
Cc: Linux-ALSA <alsa-devel@alsa-project.org>,
	Sameer Pujar <spujar@nvidia.com>
Subject: [PATCH] ASoC: audio-graph-card2: fix index check on graph_parse_node_multi_nm()
Date: Fri, 12 Jan 2024 06:10:15 +0000	[thread overview]
Message-ID: <87o7drdqux.wl-kuninori.morimoto.gx@renesas.com> (raw)

commit d685aea5e0a8 ("ASoC: audio-graph-card2: fix off by one in
graph_parse_node_multi_nm()") uses ">=" instead of ">" for index check,
but it was wrong. The nm_idx will be increment at end of loop,
thus, ">" is correct.

	while (1) {
		...
=>		if (*nm_idx > nm_max)
			break;
		...
		(*nm_idx)++;
	}

Without this patch, "Multi-Codec-1" sample on
${LINUX}/sound/soc/generic/audio-graph-card2-custom-sample.dtsi
will be error.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/generic/audio-graph-card2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c
index 9c94677f681a..62606e20be9a 100644
--- a/sound/soc/generic/audio-graph-card2.c
+++ b/sound/soc/generic/audio-graph-card2.c
@@ -556,7 +556,7 @@ static int graph_parse_node_multi_nm(struct snd_soc_dai_link *dai_link,
 		struct device_node *mcodec_port;
 		int codec_idx;
 
-		if (*nm_idx >= nm_max)
+		if (*nm_idx > nm_max)
 			break;
 
 		mcpu_ep_n = of_get_next_child(mcpu_port, mcpu_ep_n);
-- 
2.25.1

