linux-kernel - [PATCH 4.4 021/108] ASoC: simple-card: Fix misleading error message

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Date:   Thu, 15 Feb 2018 16:16:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Julian Scheel <julian@...st.de>,
        Mark Brown <broonie@...nel.org>,
        thongsyho <thong.ho.px@....renesas.com>,
        Nhan Nguyen <nhan.nguyen.yb@...esas.com>
Subject: [PATCH 4.4 021/108] ASoC: simple-card: Fix misleading error message

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Julian Scheel <julian@...st.de>

commit 7ac45d1635a4cd2e99a4b11903d4a2815ca1b27b upstream.

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>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: thongsyho <thong.ho.px@....renesas.com>
Signed-off-by: Nhan Nguyen <nhan.nguyen.yb@...esas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/soc/generic/simple-card.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -343,13 +343,19 @@ static int asoc_simple_card_dai_link_of(
 	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;