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| author | Johan Hovold <johan@kernel.org> | 2018-01-31 06:59:21 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-02-07 12:16:39 +0100 |
| commit | 3a0a7b261009a9eaebd84140e933ee579df18d0c (patch) | |
| tree | 76800ddda68a2603b466322066bdf8ea19ab6e2d /sound/soc/mediatek/mt8173/mt8173-rt5650.c | |
| parent | Linux 4.15-rc1 (diff) | |
| download | linux-3a0a7b261009a9eaebd84140e933ee579df18d0c.tar.xz linux-3a0a7b261009a9eaebd84140e933ee579df18d0c.zip | |
ASoC: mt8173-rt5650: fix child-node lookup
This driver used the wrong OF-helper when looking up the optional
capture-codec child node during probe. Instead of searching just
children of the sound node, a tree-wide depth-first search starting at
the unrelated platform node was done. Not only could this end up
matching an unrelated node or no node at all; the platform node could
also be prematurely freed since of_find_node_by_name() drops a reference
to its first argument. This particular pattern has been observed leading
to crashes after probe deferrals in other drivers.
Fix this by dropping the broken call to of_find_node_by_name() and
keeping only the second, correct lookup using of_get_child_by_name()
while taking care not to bail out if the optional node is missing.
Note that this also addresses two capture-codec node-reference leaks
(one for each of the original helper calls).
Compile tested only.
Fixes: d349caeb0510 ("ASoC: mediatek: Add second I2S on mt8173-rt5650 machine driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/mediatek/mt8173/mt8173-rt5650.c')
| -rw-r--r-- | sound/soc/mediatek/mt8173/mt8173-rt5650.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/sound/soc/mediatek/mt8173/mt8173-rt5650.c b/sound/soc/mediatek/mt8173/mt8173-rt5650.c index e69c141d8ed4..45fc2d2640ae 100644 --- a/sound/soc/mediatek/mt8173/mt8173-rt5650.c +++ b/sound/soc/mediatek/mt8173/mt8173-rt5650.c @@ -274,15 +274,10 @@ static int mt8173_rt5650_dev_probe(struct platform_device *pdev) } mt8173_rt5650_codecs[1].of_node = mt8173_rt5650_codecs[0].of_node; - if (of_find_node_by_name(platform_node, "codec-capture")) { - np = of_get_child_by_name(pdev->dev.of_node, "codec-capture"); - if (!np) { - dev_err(&pdev->dev, - "%s: Can't find codec-capture DT node\n", - __func__); - return -EINVAL; - } + np = of_get_child_by_name(pdev->dev.of_node, "codec-capture"); + if (np) { ret = snd_soc_of_get_dai_name(np, &codec_capture_dai); + of_node_put(np); if (ret < 0) { dev_err(&pdev->dev, "%s codec_capture_dai name fail %d\n", |