5.4-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan+linaro@kernel.org
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: 2bc02355f8ba ("usb: dwc3: qcom: Add support for booting with ACPI") Fixes: a4333c3a6ba9 ("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 --- drivers/usb/dwc3/dwc3-qcom.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -553,6 +553,7 @@ static int dwc3_qcom_of_register_core(st 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 platfo
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 @@ depopulate: 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 platf 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]);