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: d349caeb05
("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>
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parent
4fbd8d194f
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@ -274,15 +274,10 @@ static int mt8173_rt5650_dev_probe(struct platform_device *pdev)
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}
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mt8173_rt5650_codecs[1].of_node = mt8173_rt5650_codecs[0].of_node;
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if (of_find_node_by_name(platform_node, "codec-capture")) {
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np = of_get_child_by_name(pdev->dev.of_node, "codec-capture");
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if (!np) {
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dev_err(&pdev->dev,
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"%s: Can't find codec-capture DT node\n",
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__func__);
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return -EINVAL;
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}
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np = of_get_child_by_name(pdev->dev.of_node, "codec-capture");
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if (np) {
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ret = snd_soc_of_get_dai_name(np, &codec_capture_dai);
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of_node_put(np);
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if (ret < 0) {
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dev_err(&pdev->dev,
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"%s codec_capture_dai name fail %d\n",
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