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

[PATCH 2/3] USB: dwc3: qcom: fix software node leak on probe errors

Posted by Johan Hovold 2 years, 1 month ago

Make sure to remove the software node also on (ACPI) probe errors to
avoid leaking the underlying resources.

Note that the software node is only used for ACPI probe so the driver
unbind tear down is updated to match probe.

Fixes: 8dc6e6dd1bee ("usb: dwc3: qcom: Constify the software node")
Cc: stable@vger.kernel.org      # 5.12
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/usb/dwc3/dwc3-qcom.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 00c3021b43ce..0703f9b85cda 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -932,10 +932,12 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
 interconnect_exit:
 	dwc3_qcom_interconnect_exit(qcom);
 depopulate:
-	if (np)
+	if (np) {
 		of_platform_depopulate(&pdev->dev);
-	else
+	} else {
+		device_remove_software_node(&qcom->dwc3->dev);
 		platform_device_del(qcom->dwc3);
+	}
 	platform_device_put(qcom->dwc3);
 clk_disable:
 	for (i = qcom->num_clocks - 1; i >= 0; i--) {
@@ -955,11 +957,12 @@ static void dwc3_qcom_remove(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	int i;
 
-	device_remove_software_node(&qcom->dwc3->dev);
-	if (np)
+	if (np) {
 		of_platform_depopulate(&pdev->dev);
-	else
+	} else {
+		device_remove_software_node(&qcom->dwc3->dev);
 		platform_device_del(qcom->dwc3);
+	}
 	platform_device_put(qcom->dwc3);
 
 	for (i = qcom->num_clocks - 1; i >= 0; i--) {
-- 
2.41.0

Re: [PATCH 2/3] USB: dwc3: qcom: fix software node leak on probe errors

Posted by Heikki Krogerus 2 years, 1 month ago

On Fri, Nov 17, 2023 at 06:36:49PM +0100, Johan Hovold wrote:
> Make sure to remove the software node also on (ACPI) probe errors to
> avoid leaking the underlying resources.
> 
> Note that the software node is only used for ACPI probe so the driver
> unbind tear down is updated to match probe.
> 
> Fixes: 8dc6e6dd1bee ("usb: dwc3: qcom: Constify the software node")
> Cc: stable@vger.kernel.org      # 5.12
> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> Signed-off-by: Johan Hovold <johan+linaro@kernel.org>

Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
>  drivers/usb/dwc3/dwc3-qcom.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
> index 00c3021b43ce..0703f9b85cda 100644
> --- a/drivers/usb/dwc3/dwc3-qcom.c
> +++ b/drivers/usb/dwc3/dwc3-qcom.c
> @@ -932,10 +932,12 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>  interconnect_exit:
>  	dwc3_qcom_interconnect_exit(qcom);
>  depopulate:
> -	if (np)
> +	if (np) {
>  		of_platform_depopulate(&pdev->dev);
> -	else
> +	} else {
> +		device_remove_software_node(&qcom->dwc3->dev);
>  		platform_device_del(qcom->dwc3);
> +	}
>  	platform_device_put(qcom->dwc3);
>  clk_disable:
>  	for (i = qcom->num_clocks - 1; i >= 0; i--) {
> @@ -955,11 +957,12 @@ static void dwc3_qcom_remove(struct platform_device *pdev)
>  	struct device *dev = &pdev->dev;
>  	int i;
>  
> -	device_remove_software_node(&qcom->dwc3->dev);
> -	if (np)
> +	if (np) {
>  		of_platform_depopulate(&pdev->dev);
> -	else
> +	} else {
> +		device_remove_software_node(&qcom->dwc3->dev);
>  		platform_device_del(qcom->dwc3);
> +	}
>  	platform_device_put(qcom->dwc3);
>  
>  	for (i = qcom->num_clocks - 1; i >= 0; i--) {
> -- 
> 2.41.0

-- 
heikki

Re: [PATCH 2/3] USB: dwc3: qcom: fix software node leak on probe errors

Posted by Andrew Halaney 2 years, 1 month ago

On Fri, Nov 17, 2023 at 06:36:49PM +0100, Johan Hovold wrote:
> Make sure to remove the software node also on (ACPI) probe errors to
> avoid leaking the underlying resources.
> 
> Note that the software node is only used for ACPI probe so the driver
> unbind tear down is updated to match probe.
> 
> Fixes: 8dc6e6dd1bee ("usb: dwc3: qcom: Constify the software node")
> Cc: stable@vger.kernel.org      # 5.12
> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> Signed-off-by: Johan Hovold <johan+linaro@kernel.org>

Acked-by: Andrew Halaney <ahalaney@redhat.com>

> ---
>  drivers/usb/dwc3/dwc3-qcom.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
> index 00c3021b43ce..0703f9b85cda 100644
> --- a/drivers/usb/dwc3/dwc3-qcom.c
> +++ b/drivers/usb/dwc3/dwc3-qcom.c
> @@ -932,10 +932,12 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>  interconnect_exit:
>  	dwc3_qcom_interconnect_exit(qcom);
>  depopulate:
> -	if (np)
> +	if (np) {
>  		of_platform_depopulate(&pdev->dev);
> -	else
> +	} else {
> +		device_remove_software_node(&qcom->dwc3->dev);
>  		platform_device_del(qcom->dwc3);
> +	}
>  	platform_device_put(qcom->dwc3);
>  clk_disable:
>  	for (i = qcom->num_clocks - 1; i >= 0; i--) {
> @@ -955,11 +957,12 @@ static void dwc3_qcom_remove(struct platform_device *pdev)
>  	struct device *dev = &pdev->dev;
>  	int i;
>  
> -	device_remove_software_node(&qcom->dwc3->dev);
> -	if (np)
> +	if (np) {
>  		of_platform_depopulate(&pdev->dev);
> -	else
> +	} else {
> +		device_remove_software_node(&qcom->dwc3->dev);
>  		platform_device_del(qcom->dwc3);
> +	}
>  	platform_device_put(qcom->dwc3);
>  
>  	for (i = qcom->num_clocks - 1; i >= 0; i--) {
> -- 
> 2.41.0
> 
>