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

commit bca065733a 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 d9c8ad935d
commit e8e20021ad
1 changed files with 5 additions and 1 deletions
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6
drivers/phy/tegra/xusb-tegra210.c
View File

@ -3165,18 +3165,22 @@ 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;
}