Patch "mfd: twl4030-audio: Fix sibling-node lookup" has been added to the 4.14-stable tree

Patch "mfd: twl4030-audio: Fix sibling-node lookup" has been added to the 4.14-stable tree

[gregkh]

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 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mfd-twl4030-audio-fix-sibling-node-lookup.patch
and it can be found in the queue-4.14 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-4.14/mfd-twl4030-audio-fix-sibling-node-lookup.patch
queue-4.14/mfd-twl6040-fix-child-node-lookup.patch