linux-kernel - [PATCH v3 0/3] ACPI: container hot remove support.

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Date:	Wed, 31 Oct 2012 15:27:48 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	yinghai@...nel.org, bhelgaas@...gle.com, lenb@...nel.org,
	jiang.liu@...wei.com, izumi.taku@...fujitsu.com,
	isimatu.yasuaki@...fujitsu.com, linux-acpi@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/3] ACPI: container hot remove support.

Hi,

The container hotplug handler container_notify_cb() didn't implement
the hot-remove functionality. So, these 3 patches implement it like
the following way:

patch 1. Do not use kacpid_wq/kacpid_notify_wq to handle container hotplug event,
         use kacpi_hotplug_wq instead to avoid deadlock.
         Doing this is to reuse acpi_bus_hot_remove_device() in container
         hot-remove handling.

patch 2. Introduce a new function container_device_remove() to handle
         ACPI_NOTIFY_EJECT_REQUEST event for container.

change log v2 -> v3:

1. Add 1 patch(patch1). As Toshi Kan mentioned, acpi_os_hotplug_execute() is already
   kernel. So use it instead of alloc_acpi_hp_work() to add hotplug job onto kacpi_hotplug_wq.

2. In patch3: Print caller's function name when container_device_remove() fails to help to debug.

3. In patch3: Add commit message to describ why we need to call acpi_bus_trim() twice when
   removing devices.

change log v1 -> v2:

1. In patch1: Based on the lastest for-pci-split-pci-root-hp-2 branch from Lu Yinghai, 
   use alloc_acpi_hp_work() to add container hotplug work into kacpi_hotplug_wq.

2. In patch2: Allocate ej_event after container is stopped, so that we don't need to
   kfree the ej_event if stopping container failed.

This is based on Lu Yinghai's job.
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci-split-pci-root-hp-2

Tang Chen (3):
  Use acpi_os_hotplug_execute() instead of alloc_acpi_hp_work().
  Use kacpi_hotplug_wq to handle container hotplug event.
  Improve container_notify_cb() to support container hot-remove.

 drivers/acpi/container.c           |   95 +++++++++++++++++++++++++++++++-----
 drivers/acpi/osl.c                 |   28 +++++-----
 drivers/acpi/pci_root_hp.c         |   25 ++++++---
 drivers/pci/hotplug/acpiphp_glue.c |   39 ++++++++-------
 include/acpi/acpiosxf.h            |    7 +--
 5 files changed, 137 insertions(+), 57 deletions(-)

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