08dcca15a0
Specifically, assume that the device is present if evaluation of _STA method fails. Before r330957 we ignored any _STA evaluation failure (which was performed by AcpiGetObjectInfo in ACPICA contrib code) for the purpose of acpi_DeviceIsPresent and acpi_BatteryIsPresent. ACPICA 20180313 removed evaluation of _STA from AcpiGetObjectInfo. So, we added evaluation of _STA to acpi_DeviceIsPresent and acpi_BatteryIsPresent. One important difference is that the new code ignored a failure only if _STA did not exist (AE_NOT_FOUND). Any other kind of failure was treated as a fatal failure. Apparently, on some systems we can get AE_NOT_EXIST when evaluating _STA. And that error is not an evil twin of AE_NOT_FOUND, despite a very similar name, but a distinct error related to a missing handler for an ACPI operation region. It's possible that for some people the problem was already fixed by changes in ACPICA and/or in acpi_ec driver (or even in BIOS) that fixed the AE_NOT_EXIST failure related to EC operation region. This work is based on a great analysis by cem and an earlier patch by Ali Abdallah <aliovx@gmail.com>. PR: 227191 Reported by: 0mp MFC after: 2 weeks
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