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phy: tegra: xusb: fix device and OF node leak at probe

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commit bca065733afd1e3a89a02f05ffe14e966cd5f78e upstream.

Make sure to drop the references taken to the PMC OF node and device by
of_parse_phandle() and of_find_device_by_node() during probe.

Note the holding a reference to the PMC device does not prevent the
PMC regmap from going away (e.g. if the PMC driver is unbound) so there
is no need to keep the reference.

Fixes: 2d10214872 ("phy: tegra: xusb: Add wake/sleepwalk for Tegra210")
Cc: stable@vger.kernel.org	# 5.14
Cc: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250724131206.2211-2-johan@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2025-07-24 15:12:04 +02:00 committed by Greg Kroah-Hartman
parent feb1f80228
commit 28cfc6ab15
1 changed files with 5 additions and 1 deletions
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6
drivers/phy/tegra/xusb-tegra210.c
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@ -3164,18 +3164,22 @@ tegra210_xusb_padctl_probe(struct device *dev,
}
pdev = of_find_device_by_node(np);
of_node_put(np);
if (!pdev) {
dev_warn(dev, "PMC device is not available\n");
goto out;
}
if (!platform_get_drvdata(pdev))
if (!platform_get_drvdata(pdev)) {
put_device(&pdev->dev);
return ERR_PTR(-EPROBE_DEFER);
}
padctl->regmap = dev_get_regmap(&pdev->dev, "usb_sleepwalk");
if (!padctl->regmap)
dev_info(dev, "failed to find PMC regmap\n");
put_device(&pdev->dev);
out:
return &padctl->base;
}