[PATCH 0/2] ACPI / scan: Two fixes for device hot-removal

From: Rafael J. Wysocki
Date: Sat Feb 09 2013 - 09:25:37 EST


The following two patches fix issues I've found revently in the ACPI device
hot-removal code.

Patch [1/2] makes acpi_bus_hot_remove_device() hold acpi_scan_lock around the
whole removal procedure to prevent potential race condition between
acpi_bus_scan() and a conflicting evaluation of _EJ0 from happening.

Patch [2/2] makes acpi_device_unregister() put devices (supporting that) into
D3cold to prevent potential problems with removing power from them without
preparation from happening and removes the totally wrong evaluation of _PS3
from acpi_bus_hot_remove_device().


I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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