This is a note to let you know that I've just added the patch titled
USB: dwc3: qcom: fix resource leaks on probe deferral
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-dwc3-qcom-fix-resource-leaks-on-probe-deferral.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 51392a1879ff06dc21b68aef4825f6ef68a7be42 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Fri, 17 Nov 2023 18:36:48 +0100
Subject: USB: dwc3: qcom: fix resource leaks on probe deferral
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
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@xxxxxxxxxxxxxxx # 4.18
Cc: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Cc: Lee Jones <lee@xxxxxxxxxx>
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Acked-by: Andrew Halaney <ahalaney@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231117173650.21161-2-johan+linaro@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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]);
Patches currently in stable-queue which might be from johan+linaro@xxxxxxxxxx are
queue-5.4/usb-dwc3-qcom-fix-resource-leaks-on-probe-deferral.patch
queue-5.4/usb-dwc3-qcom-fix-wakeup-after-probe-deferral.patch
