linux/drivers/acpi/acpi_memhotplug.c, branch v3.8

ACPI / memhotplug: remove redundant logic of acpi memory hotadd

2013-01-03T12:10:21Z

When memory hotadd, acpi_memory_enable_device has already been done at drv->ops.add (acpi_memory_device_add), no need to do it again at notify callback. At acpi_memory_enable_device, acpi_memory_get_device_resources is also a redundant action, since it has been done at drv->ops.add. Signed-off-by: Liu Jinsong Signed-off-by: Rafael J. Wysocki

ACPI: Update Memory hotplug error messages

2012-11-21T22:20:22Z

Updated Memory hotplug error messages with acpi_handle_(), dev_() and pr_(). Added missing "\n". Signed-off-by: Toshi Kani Signed-off-by: Rafael J. Wysocki

ACPI / memhotplug: bind the memory device when the driver is being loaded

2012-11-16T01:12:38Z

We had introduced acpi_hotmem_initialized to avoid strange add_memory fail message. But the memory device may not be used by the kernel, and the device should be bound when the driver is being loaded. Remove acpi_hotmem_initialized to allow that the device can be bound when the driver is being loaded. Signed-off-by: Wen Congyang Reviewed-by: Yasuaki Ishimatsu Acked-by: David Rientjes Signed-off-by: Rafael J. Wysocki

ACPI / memhotplug: don't allow to eject the memory device if it is being used

2012-11-16T01:10:37Z

We eject the memory device even if it is in use. It is very dangerous, and it will cause the kernel to be panicked. Signed-off-by: Wen Congyang Reviewed-by: Yasuaki Ishimatsu Acked-by: David Rientjes Signed-off-by: Rafael J. Wysocki

ACPI / memhotplug: free memory device if acpi_memory_enable_device() failed

2012-11-16T01:08:16Z

If acpi_memory_enable_device() fails, acpi_memory_enable_device() will return a non-zero value, which means we fail to bind the memory device to this driver. So we should free memory device before acpi_memory_device_add() returns. Signed-off-by: Wen Congyang Reviewed-by: Yasuaki Ishimatsu Acked-by: David Rientjes Signed-off-by: Rafael J. Wysocki

ACPI / memhotplug: fix memory leak when memory device is unbound from acpi_memhotplug

2012-11-16T01:06:06Z

We allocate memory to store acpi_memory_info, so we should free it before freeing mem_device. Signed-off-by: Wen Congyang Reviewed-by: Yasuaki Ishimatsu Acked-by: David Rientjes Signed-off-by: Rafael J. Wysocki

ACPI / memhotplug: deal with eject request in hotplug queue

2012-11-16T01:04:05Z

The memory device can be removed by 2 ways: 1. send eject request by SCI 2. echo 1 >/sys/bus/pci/devices/PNP0C80:XX/eject We handle the 1st case in the module acpi_memhotplug, and handle the 2nd case in ACPI eject notification. This 2 events may happen at the same time, so we may touch acpi_memory_device.res_list at the same time. This patch reimplements memory-hotremove support through an ACPI eject notification. Now the memory device is offlined and hotremoved only in the function acpi_memory_device_remove() which is protected by device_lock(). Signed-off-by: Wen Congyang Reviewed-by: Yasuaki Ishimatsu Reviewed-by: Toshi Kani Signed-off-by: Rafael J. Wysocki

ACPI / memory-hotplug: add memory offline code to acpi_memory_device_remove()

2012-11-16T00:56:01Z

The memory device can be removed by 2 ways: 1. send eject request by SCI 2. echo 1 >/sys/bus/pci/devices/PNP0C80:XX/eject In the 1st case, acpi_memory_disable_device() will be called. In the 2nd case, acpi_memory_device_remove() will be called. acpi_memory_device_remove() will also be called when we unbind the memory device from the driver acpi_memhotplug or a driver initialization fails. acpi_memory_disable_device() has already implemented a code which offlines memory and releases acpi_memory_info struct. But acpi_memory_device_remove() has not implemented it yet. So the patch move offlining memory and releasing acpi_memory_info struct codes to a new function acpi_memory_remove_memory(). And it is used by both acpi_memory_device_remove() and acpi_memory_disable_device(). Signed-off-by: Yasuaki Ishimatsu Signed-off-by: Wen Congyang Acked-by: David Rientjes Signed-off-by: Rafael J. Wysocki

ACPI / memory-hotplug: call acpi_bus_trim() to remove memory device

2012-11-14T23:22:27Z

The memory device has been ejected and powoffed, so we can call acpi_bus_trim() to remove the memory device from acpi bus. Signed-off-by: Wen Congyang Signed-off-by: Rafael J. Wysocki

ACPI: Add _OST support for ACPI memory hotplug

2012-06-04T05:09:21Z

Changed acpi_memory_device_notify() to call ACPI _OST method when ACPI memory hotplug operation has completed. Signed-off-by: Toshi Kani Signed-off-by: Len Brown