diff options
| author | Johan Hovold <johan@kernel.org> | 2017-11-11 16:38:43 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-02 20:33:20 +0100 |
| commit | ee54e7a18e56131ff1ebabf7d0724e4e0797a518 (patch) | |
| tree | 3c4f00b275075cc7fe7a47c16a56a111023e9a4d /drivers | |
| parent | 381d368c9954309bd2f250bbab39f7bd62d8a457 (diff) | |
mfd: twl4030-audio: Fix sibling-node lookup
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/twl4030-audio.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/mfd/twl4030-audio.c b/drivers/mfd/twl4030-audio.c index 0a1606480023..cc832d309599 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; } |