[PATCH V7 5/7] ACPI: Delay the enumeration on the devices whose dependency has not met

On Monday, March 13, 2017 10:42:41 AM zhichang.yuan wrote:

In commit 40e7fcb1929(ACPI: Add _DEP support to fix battery issue on Asus
T100TA), the '_DEP' was supported to solve the dependency of Asus battery. But
this patch is specific to Asus battery device.
In the real world, there are other devices which need the dependency to play the
role on the enumeration order. For example, all the Hip06 LPC
periperals(IPMI-BT, uart, etc) must be scanned after the LPC host driver
finished the probing. So, it makes sense to add a checking whether the ACPI
device meet all the dependencies during its enumeration slot, if not, the
enumeration will be delayed till all dependency master finish their work.

This patch adds the dependency checking in ACPI enumeration, also the
corresponding handling to retrigger the Hip06 LPC peripherals' scanning.

AFAICS, _DEP is generally abused in the wild and cannot be made generic.  Sorry.

Thanks,
Rafael