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")
Cc: stable <stable@xxxxxxxxxxxxxxx> # 3.7
Cc: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
---
drivers/mfd/twl4030-audio.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/mfd/twl4030-audio.c b/drivers/mfd/twl4030-audio.c
index da16bf45fab4..dc94ffc6321a 100644
--- 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;
}
--
2.15.0
--
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