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

jhovold · gregkh · commit 28cfc6ab15b9 · 2025-09-19T16:35:51.000+02:00
commit bca0657 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: 2d10214 ("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>
diff --git a/drivers/phy/tegra/xusb-tegra210.c b/drivers/phy/tegra/xusb-tegra210.c
@@ -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;
 }
