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USB: dwc3: qcom: fix resource leaks on probe deferral

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commit 51392a1879ff06dc21b68aef4825f6ef68a7be42 upstream.

The driver needs to deregister and free the newly allocated dwc3 core
platform device on ACPI probe errors (e.g. probe deferral) and on driver
unbind but instead it leaked those resources while erroneously dropping
a reference to the parent platform device which is still in use.

For OF probing the driver takes a reference to the dwc3 core platform
device which has also always been leaked.

Fix the broken ACPI tear down and make sure to drop the dwc3 core
reference for both OF and ACPI.

Fixes: 8fd95da2cfb5 ("usb: dwc3: qcom: Release the correct resources in dwc3_qcom_remove()")
Fixes: 2bc02355f8 ("usb: dwc3: qcom: Add support for booting with ACPI")
Fixes: a4333c3a6b ("usb: dwc3: Add Qualcomm DWC3 glue driver")
Cc: stable@vger.kernel.org      # 4.18
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Lee Jones <lee@kernel.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Andrew Halaney <ahalaney@redhat.com>
Link: https://lore.kernel.org/r/20231117173650.21161-2-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2023-11-17 18:36:48 +01:00 committed by Greg Kroah-Hartman
parent ca44455362
commit db62d193e6
1 changed files with 6 additions and 3 deletions
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9
drivers/usb/dwc3/dwc3-qcom.c
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@ -553,6 +553,7 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev)
if (!qcom->dwc3) {
ret = -ENODEV;
dev_err(dev, "failed to get dwc3 platform device\n");
of_platform_depopulate(dev);
}
node_put:
@ -666,7 +667,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
if (ret) {
dev_err(dev, "failed to register DWC3 Core, err=%d\n", ret);
goto depopulate;
goto clk_disable;
}
qcom->mode = usb_get_dr_mode(&qcom->dwc3->dev);
@ -692,7 +693,8 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
if (np)
of_platform_depopulate(&pdev->dev);
else
platform_device_put(pdev);
platform_device_del(qcom->dwc3);
platform_device_put(qcom->dwc3);
clk_disable:
for (i = qcom->num_clocks - 1; i >= 0; i--) {
clk_disable_unprepare(qcom->clks[i]);
@ -714,7 +716,8 @@ static int dwc3_qcom_remove(struct platform_device *pdev)
if (np)
of_platform_depopulate(&pdev->dev);
else
platform_device_put(pdev);
platform_device_del(qcom->dwc3);
platform_device_put(qcom->dwc3);
for (i = qcom->num_clocks - 1; i >= 0; i--) {
clk_disable_unprepare(qcom->clks[i]);