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;a=summary
The filename of the patch is:
mfd-twl4030-audio-fix-sibling-node-lookup.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0a423772de2f3d7b00899987884f62f63ae00dcb Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Sat, 11 Nov 2017 16:38:43 +0100
Subject: mfd: twl4030-audio: Fix sibling-node lookup
From: Johan Hovold <johan@xxxxxxxxxx>
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@xxxxxxxxxx>
Acked-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx are
queue-4.4/mfd-twl4030-audio-fix-sibling-node-lookup.patch
queue-4.4/mfd-twl6040-fix-child-node-lookup.patch