Re: [PATCH v3 2/2] platform/surface: aggregator: Log critical errors during SAM probing

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Hi,

On 5/5/24 3:07 PM, Weifeng Liu wrote:
> Emits messages upon errors during probing of SAM.  Hopefully this could
> provide useful context to user for the purpose of diagnosis when
> something miserable happen.
> 
> Reviewed-by: Maximilian Luz <luzmaximilian@xxxxxxxxx>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Acked-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> Signed-off-by: Weifeng Liu <weifeng.liu.z@xxxxxxxxx>

Thank you for your patch, I've applied this patch to my review-hans 
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans



> ---
>  drivers/platform/surface/aggregator/core.c | 42 ++++++++++++++--------
>  1 file changed, 27 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/platform/surface/aggregator/core.c b/drivers/platform/surface/aggregator/core.c
> index 7b1871eb7a6f..046fa63446bf 100644
> --- a/drivers/platform/surface/aggregator/core.c
> +++ b/drivers/platform/surface/aggregator/core.c
> @@ -618,15 +618,17 @@ static const struct acpi_gpio_mapping ssam_acpi_gpios[] = {
>  
>  static int ssam_serial_hub_probe(struct serdev_device *serdev)
>  {
> -	struct acpi_device *ssh = ACPI_COMPANION(&serdev->dev);
> +	struct device *dev = &serdev->dev;
> +	struct acpi_device *ssh = ACPI_COMPANION(dev);
>  	struct ssam_controller *ctrl;
>  	acpi_status astatus;
>  	int status;
>  
> -	if (gpiod_count(&serdev->dev, NULL) < 0)
> -		return -ENODEV;
> +	status = gpiod_count(dev, NULL);
> +	if (status < 0)
> +		return dev_err_probe(dev, status, "no GPIO found\n");
>  
> -	status = devm_acpi_dev_add_driver_gpios(&serdev->dev, ssam_acpi_gpios);
> +	status = devm_acpi_dev_add_driver_gpios(dev, ssam_acpi_gpios);
>  	if (status)
>  		return status;
>  
> @@ -637,8 +639,11 @@ static int ssam_serial_hub_probe(struct serdev_device *serdev)
>  
>  	/* Initialize controller. */
>  	status = ssam_controller_init(ctrl, serdev);
> -	if (status)
> +	if (status) {
> +		dev_err_probe(dev, status,
> +			      "failed to initialize ssam controller\n");
>  		goto err_ctrl_init;
> +	}
>  
>  	ssam_controller_lock(ctrl);
>  
> @@ -657,14 +662,13 @@ static int ssam_serial_hub_probe(struct serdev_device *serdev)
>  	if (status == -ENXIO)
>  		status = -EPROBE_DEFER;
>  	if (status) {
> -		dev_err_probe(&serdev->dev, status,
> -			      "failed to open serdev device\n");
> +		dev_err_probe(dev, status, "failed to open serdev device\n");
>  		goto err_devopen;
>  	}
>  
>  	astatus = ssam_serdev_setup_via_acpi(ssh->handle, serdev);
>  	if (ACPI_FAILURE(astatus)) {
> -		status = -ENXIO;
> +		status = dev_err_probe(dev, -ENXIO, "failed to setup serdev\n");
>  		goto err_devinit;
>  	}
>  
> @@ -680,25 +684,33 @@ static int ssam_serial_hub_probe(struct serdev_device *serdev)
>  	 * states.
>  	 */
>  	status = ssam_log_firmware_version(ctrl);
> -	if (status)
> +	if (status) {
> +		dev_err_probe(dev, status, "failed to get firmware version\n");
>  		goto err_initrq;
> +	}
>  
>  	status = ssam_ctrl_notif_d0_entry(ctrl);
> -	if (status)
> +	if (status) {
> +		dev_err_probe(dev, status, "D0-entry notification failed\n");
>  		goto err_initrq;
> +	}
>  
>  	status = ssam_ctrl_notif_display_on(ctrl);
> -	if (status)
> +	if (status) {
> +		dev_err_probe(dev, status, "display-on notification failed\n");
>  		goto err_initrq;
> +	}
>  
> -	status = sysfs_create_group(&serdev->dev.kobj, &ssam_sam_group);
> +	status = sysfs_create_group(&dev->kobj, &ssam_sam_group);
>  	if (status)
>  		goto err_initrq;
>  
>  	/* Set up IRQ. */
>  	status = ssam_irq_setup(ctrl);
> -	if (status)
> +	if (status) {
> +		dev_err_probe(dev, status, "failed to setup IRQ\n");
>  		goto err_irq;
> +	}
>  
>  	/* Finally, set main controller reference. */
>  	status = ssam_try_set_controller(ctrl);
> @@ -715,7 +727,7 @@ static int ssam_serial_hub_probe(struct serdev_device *serdev)
>  	 *       resumed. In short, this causes some spurious unwanted wake-ups.
>  	 *       For now let's thus default power/wakeup to false.
>  	 */
> -	device_set_wakeup_capable(&serdev->dev, true);
> +	device_set_wakeup_capable(dev, true);
>  	acpi_dev_clear_dependencies(ssh);
>  
>  	return 0;
> @@ -723,7 +735,7 @@ static int ssam_serial_hub_probe(struct serdev_device *serdev)
>  err_mainref:
>  	ssam_irq_free(ctrl);
>  err_irq:
> -	sysfs_remove_group(&serdev->dev.kobj, &ssam_sam_group);
> +	sysfs_remove_group(&dev->kobj, &ssam_sam_group);
>  err_initrq:
>  	ssam_controller_lock(ctrl);
>  	ssam_controller_shutdown(ctrl);





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