Currently, ACPI hotplug is mostly handled in drivers. I'm working on moving
that hotplug support out of drivers and into the Linux/ACPI core.
These patches change the Linux/ACPI notify handling to use the
acpi_handle a bit longer before looking up an acpi_device.
System notifications often deal with device presence and status change.
In these cases, we may not have an acpi_device. For example, we may
get a Device Check notification on an object that previously was not
present. Since the object was not present, we would not have had an
acpi_device for it.
Note: The last patch in this series depends on this previous patch
that is not upstream yet:
http://patchwork.kernel.org/patch/21076/
Comments welcome.
---
Bjorn Helgaas (4):
ACPI: use handle, not device, in system notification path
ACPI: remove unused return values from Bus Check & Device Check handling
ACPI: remove unused "status_changed" return value from Check Device handling
ACPI: simplify notification debug messages
drivers/acpi/bus.c | 93 +++++++++++++---------------------------------------
1 files changed, 23 insertions(+), 70 deletions(-)
--
Bjorn
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