This is a note to let you know that I've just added the patch titled

mfd: twl4030-audio: Fix sibling-node lookup

to the 4.4-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: mfd-twl4030-audio-fix-sibling-node-lookup.patch and it can be found in the queue-4.4 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 0a423772de2f3d7b00899987884f62f63ae00dcb Mon Sep 17 00:00:00 2001

From: Johan Hovold johan@kernel.org Date: Sat, 11 Nov 2017 16:38:43 +0100 Subject: mfd: twl4030-audio: Fix sibling-node lookup

From: Johan Hovold johan@kernel.org

commit 0a423772de2f3d7b00899987884f62f63ae00dcb upstream.

A helper purported to look up a child node based on its name was using the wrong of-helper and ended up prematurely freeing the parent of-node while leaking any matching node.

To make things worse, any matching node would not even necessarily be a child node as the whole device tree was searched depth-first starting at the parent.

Fixes: 019a7e6b7b31 ("mfd: twl4030-audio: Add DT support") Signed-off-by: Johan Hovold johan@kernel.org Acked-by: Peter Ujfalusi peter.ujfalusi@ti.com Signed-off-by: Lee Jones lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/mfd/twl4030-audio.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/mfd/twl4030-audio.c +++ b/drivers/mfd/twl4030-audio.c @@ -159,13 +159,18 @@ unsigned int twl4030_audio_get_mclk(void EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);

static bool twl4030_audio_has_codec(struct twl4030_audio_data *pdata, - struct device_node *node) + struct device_node *parent) { + struct device_node *node; + if (pdata && pdata->codec) return true;

- if (of_find_node_by_name(node, "codec")) + node = of_get_child_by_name(parent, "codec"); + if (node) { + of_node_put(node); return true; + }

return false; }

Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.4/mfd-twl4030-audio-fix-sibling-node-lookup.patch queue-4.4/mfd-twl6040-fix-child-node-lookup.patch