Hi All, Here is v2 of this set, new in v2 is the addressing of Bjorn's comments to the "PCI: acpiphp_ibm: prepare for acpi_get_object_info no longer returning status" patch and a new patch (the first patch in v2) which exports acpi_bus_get_status_handle() for use in modules as acpiphp_ibm will now depend on it. Here is the old coverletter from v1 (adjusted for the new patch): The ACPI code already contains quite a bit of code to not bind the ACPI-battery until all deps for an ACPI battery device have been met, but on some devices calling _STA before all deps are met is a problem too because the _STA method uses an i2c OpRegion there. Here is the DSDT of the device I'm seeing this on: https://fedorapeople.org/~jwrdegoede/toshiba-click-mini-dsdt.dsl This series modifies the kernel to not call _STA until all deps are met, mirroring the binding behavior of the battery driver. Without this series a total of 32 ACPI errors get printend to the console on boot, there are 4 errors per _STA call, 2 battery devices on this system and 4 _STA calls per battery device. The first 2 commits are preparation commits for making the ACPICA changes in the 4th commit, these commits are necessary to not break things after the ACPICA changes. The 3th commit modifies acpi_bus_get_status to not call _STA on battery devices until all deps are met. This fixes 2 of the 4 too early _STA calls triggering these errors. The 4th commit makes the device instantiation code use acpi_bus_get_status instead of acpi_bus_get_status_handle so that the code to get the initial status also does not makes 1 too early _STA call. The 5th commit changes the ACPICA acpi_get_object_info function to not call _STA. Only 1 user (which is fixed in the first commit) cares about acpi_device_info.current_status. And the ACPICA code has this comment: * Note: This interface is intended to be used during the initial device * discovery namespace traversal. Therefore, no complex methods can be * executed, especially those that access operation regions. Therefore, do * not add any additional methods that could cause problems in this area. * Because of this reason support for the following methods has been removed: * this was the fate of the _SUB method which was found to cause such * problems and was removed (11/2015). The described problems with the _SUB method clearly also apply to the _STA method, so removing it from acpi_get_object_info seems like it is the right thing to do here. This too fixes 1 too early _STA call, so that with all 5 patches in place we've fixed all 4 too early _STA calls. Regards, Hans
