linux-kernel - [PATCH] ASoC: simple-card: Fix misleading error message

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Message-Id: <20170524102823.8253-1-julian@jusst.de>
Date:   Wed, 24 May 2017 12:28:23 +0200
From:   Julian Scheel <julian@...st.de>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Cc:     Julian Scheel <julian@...st.de>
Subject: [PATCH] ASoC: simple-card: Fix misleading error message

In case cpu could not be found the error message would always refer to
/codec/ not being found in DT. Fix this by catching the cpu node not found
case explicitly.

Signed-off-by: Julian Scheel <julian@...st.de>
---
 sound/soc/generic/simple-card.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 7ed84f811205..38d7b601546f 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -233,13 +233,19 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 	snprintf(prop, sizeof(prop), "%scpu", prefix);
 	cpu = of_get_child_by_name(node, prop);
 
+	if (!cpu) {
+		ret = -EINVAL;
+		dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
+		goto dai_link_of_err;
+	}
+
 	snprintf(prop, sizeof(prop), "%splat", prefix);
 	plat = of_get_child_by_name(node, prop);
 
 	snprintf(prop, sizeof(prop), "%scodec", prefix);
 	codec = of_get_child_by_name(node, prop);
 
-	if (!cpu || !codec) {
+	if (!codec) {
 		ret = -EINVAL;
 		dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 		goto dai_link_of_err;
-- 
2.12.2