This is a note to let you know that I've just added the patch titled
ASoC: twl4030: fix child-node lookup
to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: asoc-twl4030-fix-child-node-lookup.patch and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 15f8c5f2415bfac73f33a14bcd83422bcbfb5298 Mon Sep 17 00:00:00 2001
From: Johan Hovold johan@kernel.org Date: Mon, 13 Nov 2017 12:12:56 +0100 Subject: ASoC: twl4030: fix child-node lookup
From: Johan Hovold johan@kernel.org
commit 15f8c5f2415bfac73f33a14bcd83422bcbfb5298 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, while the child node was leaked.
Fixes: 2d6d649a2e0f ("ASoC: twl4030: Support for DT booted kernel") Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- sound/soc/codecs/twl4030.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/sound/soc/codecs/twl4030.c +++ b/sound/soc/codecs/twl4030.c @@ -232,7 +232,7 @@ static struct twl4030_codec_data *twl403 struct twl4030_codec_data *pdata = dev_get_platdata(codec->dev); struct device_node *twl4030_codec_node = NULL;
- twl4030_codec_node = of_find_node_by_name(codec->dev->parent->of_node, + twl4030_codec_node = of_get_child_by_name(codec->dev->parent->of_node, "codec");
if (!pdata && twl4030_codec_node) { @@ -241,9 +241,11 @@ static struct twl4030_codec_data *twl403 GFP_KERNEL); if (!pdata) { dev_err(codec->dev, "Can not allocate memory\n"); + of_node_put(twl4030_codec_node); return NULL; } twl4030_setup_pdata_of(pdata, twl4030_codec_node); + of_node_put(twl4030_codec_node); }
return pdata;
Patches currently in stable-queue which might be from johan@kernel.org are
queue-3.18/mfd-twl4030-audio-fix-sibling-node-lookup.patch queue-3.18/asoc-twl4030-fix-child-node-lookup.patch queue-3.18/mfd-twl6040-fix-child-node-lookup.patch