Re: [PATCH v10 6/9] s390/pci: Store PCI error information for passthrough devices

[Markus Elfring]

…
> +++ b/arch/s390/pci/pci_event.c
…
> +void zpci_cleanup_pending_errors(struct zpci_dev *zdev)
> +{
…
> +	mutex_lock(&zdev->pending_errs_lock);
> +	pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
…
> +	pci_dev_put(pdev);
> +	mutex_unlock(&zdev->pending_errs_lock);
> +}
…

Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&zdev->pending_errs_lock);”?
https://elixir.bootlin.com/linux/v7.0-rc3/source/include/linux/mutex.h#L253

Regards,
Markus