Hi Rafael, Why is _SUN method decoded and the sun sysfs created even if _STA reports that the device is not present and not functional? By this commit, "202317a : ACPI / scan: Add acpi_device objects for all device nodes in the namespace", all device nodes in the namespace are shown under /sys/bus/acpi/devices direcotry even if the devices are not present and not functional. But ACPI specification says against return value information of _STA: A device can only decode its hardware resources if both bits 0 and 1 are set. If the device is not present (bit 0 cleared) or not enabled (bit 1 cleared), then the device must not decode its resources. In my understanding, when the device is not present and not functional, _SUN of the device must not be decoded. Is my understanding worng? In our box, when the device is not present and not functional, _SUN method of the device returns wrong value. And the values is cached to acpi_device->pnp.sun. So when hot adding the device and changing _SUN value, the information is not reflected to acpi_device->pnp.sun. I think the issue is solved by not caching sun value. But at first, I want to know whether current implementation is correct or not. Thanks, Yasuaki Ishimatsu -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
