On Tue, 9 May 2017, Hans de Goede wrote: > For ACPI devices which do not have a _PSC method, the ACPI subsys cannot > query their initial state at boot, so these devices are assumed to have > been put in D0 by the BIOS, but for touchscreens that is not always true. > > This commit adds a call to acpi_device_fix_up_power to explicitly put > devices without a _PSC method into D0 state (for devices with a _PSC > method it is a nop). Note we only need to do this on probe, after a > resume the ACPI subsys knows the device is in D3 and will properly > put it in D0. > > This fixes the SIS0817 i2c-hid touchscreen on a Peaq C1010 2-in-1 > device failing to probe with a "hid_descr_cmd failed" error. > > Acked-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx> > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > --- > Changes in v2: > -Improve commit msg > -Add Benjamin's Acked-by Applied to for-4.12/upstream-fixes, thanks. -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
