linux-kernel - [PATCH 4.14 041/146] ASoC: da7218: fix fix child-node lookup

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Date:   Mon,  1 Jan 2018 15:37:12 +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, Johan Hovold <johan@...nel.org>,
        Adam Thomson <Adam.Thomson.Opensource@...semi.com>,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH 4.14 041/146] ASoC: da7218: fix fix child-node lookup

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

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

From: Johan Hovold <johan@...nel.org>

commit bc6476d6c1edcb9b97621b5131bd169aa81f27db upstream.

Fix child-node lookup during probe, which ended up searching the whole
device tree depth-first starting at the parent rather than just matching
on its children.

To make things worse, the parent codec node was also prematurely freed.

Fixes: 4d50934abd22 ("ASoC: da7218: Add da7218 codec driver")
Signed-off-by: Johan Hovold <johan@...nel.org>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/soc/codecs/da7218.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/soc/codecs/da7218.c
+++ b/sound/soc/codecs/da7218.c
@@ -2520,7 +2520,7 @@ static struct da7218_pdata *da7218_of_to
 	}
 
 	if (da7218->dev_id == DA7218_DEV_ID) {
-		hpldet_np = of_find_node_by_name(np, "da7218_hpldet");
+		hpldet_np = of_get_child_by_name(np, "da7218_hpldet");
 		if (!hpldet_np)
 			return pdata;