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authorBjorn Helgaas <bhelgaas@google.com>2012-08-24 14:32:07 -0600
committerBjorn Helgaas <bhelgaas@google.com>2012-08-24 14:32:07 -0600
commitc2b5acc3a3ba80bef61b9df712004e83cbab4a11 (patch)
tree536076cd98c31e95af3e05b9b9f6de9c51f8d927 /drivers/pci
parent0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff)
downloadop-kernel-dev-c2b5acc3a3ba80bef61b9df712004e83cbab4a11.zip
op-kernel-dev-c2b5acc3a3ba80bef61b9df712004e83cbab4a11.tar.gz
PCI: Remove the fakephp driver
The fakephp driver was scheduled for removal in 2011. Fakephp presented /sys/bus/pci/slots/.../power files for every PCI function. Writing "0" to one of these files logically removed the device from the system. The PCI core now provides the same functionality with /sys/bus/pci/devices/.../remove. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/hotplug/Kconfig24
-rw-r--r--drivers/pci/hotplug/Makefile3
-rw-r--r--drivers/pci/hotplug/fakephp.c164
3 files changed, 1 insertions, 190 deletions
diff --git a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig
index 66f29bc..b0e46de 100644
--- a/drivers/pci/hotplug/Kconfig
+++ b/drivers/pci/hotplug/Kconfig
@@ -17,28 +17,6 @@ menuconfig HOTPLUG_PCI
if HOTPLUG_PCI
-config HOTPLUG_PCI_FAKE
- tristate "Fake PCI Hotplug driver"
- help
- Say Y here if you want to use the fake PCI hotplug driver. It can
- be used to simulate PCI hotplug events if even if your system is
- not PCI hotplug capable.
-
- This driver will "emulate" removing PCI devices from the system.
- If the "power" file is written to with "0" then the specified PCI
- device will be completely removed from the kernel.
-
- WARNING, this does NOT turn off the power to the PCI device.
- This is a "logical" removal, not a physical or electrical
- removal.
-
- Use this module at your own risk. You have been warned!
-
- To compile this driver as a module, choose M here: the
- module will be called fakephp.
-
- When in doubt, say N.
-
config HOTPLUG_PCI_COMPAQ
tristate "Compaq PCI Hotplug driver"
depends on X86 && PCI_BIOS
@@ -143,7 +121,7 @@ config HOTPLUG_PCI_SHPC
config HOTPLUG_PCI_RPA
tristate "RPA PCI Hotplug driver"
- depends on PPC_PSERIES && EEH && !HOTPLUG_PCI_FAKE
+ depends on PPC_PSERIES && EEH
help
Say Y here if you have a RPA system that supports PCI Hotplug.
diff --git a/drivers/pci/hotplug/Makefile b/drivers/pci/hotplug/Makefile
index 6cd9f3c..c459cd4 100644
--- a/drivers/pci/hotplug/Makefile
+++ b/drivers/pci/hotplug/Makefile
@@ -23,9 +23,6 @@ obj-$(CONFIG_HOTPLUG_PCI_ACPI) += acpiphp.o
obj-$(CONFIG_HOTPLUG_PCI_ACPI_IBM) += acpiphp_ibm.o
-# Link this last so it doesn't claim devices that have a real hotplug driver
-obj-$(CONFIG_HOTPLUG_PCI_FAKE) += fakephp.o
-
pci_hotplug-objs := pci_hotplug_core.o pcihp_slot.o
ifdef CONFIG_HOTPLUG_PCI_CPCI
diff --git a/drivers/pci/hotplug/fakephp.c b/drivers/pci/hotplug/fakephp.c
deleted file mode 100644
index a019c9a..0000000
--- a/drivers/pci/hotplug/fakephp.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/* Works like the fakephp driver used to, except a little better.
- *
- * - It's possible to remove devices with subordinate busses.
- * - New PCI devices that appear via any method, not just a fakephp triggered
- * rescan, will be noticed.
- * - Devices that are removed via any method, not just a fakephp triggered
- * removal, will also be noticed.
- *
- * Uses nothing from the pci-hotplug subsystem.
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/list.h>
-#include <linux/kobject.h>
-#include <linux/sysfs.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/device.h>
-#include <linux/slab.h>
-#include "../pci.h"
-
-struct legacy_slot {
- struct kobject kobj;
- struct pci_dev *dev;
- struct list_head list;
-};
-
-static LIST_HEAD(legacy_list);
-
-static ssize_t legacy_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- struct legacy_slot *slot = container_of(kobj, typeof(*slot), kobj);
- strcpy(buf, "1\n");
- return 2;
-}
-
-static void remove_callback(void *data)
-{
- pci_stop_and_remove_bus_device((struct pci_dev *)data);
-}
-
-static ssize_t legacy_store(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t len)
-{
- struct legacy_slot *slot = container_of(kobj, typeof(*slot), kobj);
- unsigned long val;
-
- if (strict_strtoul(buf, 0, &val) < 0)
- return -EINVAL;
-
- if (val)
- pci_rescan_bus(slot->dev->bus);
- else
- sysfs_schedule_callback(&slot->dev->dev.kobj, remove_callback,
- slot->dev, THIS_MODULE);
- return len;
-}
-
-static struct attribute *legacy_attrs[] = {
- &(struct attribute){ .name = "power", .mode = 0644 },
- NULL,
-};
-
-static void legacy_release(struct kobject *kobj)
-{
- struct legacy_slot *slot = container_of(kobj, typeof(*slot), kobj);
-
- pci_dev_put(slot->dev);
- kfree(slot);
-}
-
-static struct kobj_type legacy_ktype = {
- .sysfs_ops = &(const struct sysfs_ops){
- .store = legacy_store, .show = legacy_show
- },
- .release = &legacy_release,
- .default_attrs = legacy_attrs,
-};
-
-static int legacy_add_slot(struct pci_dev *pdev)
-{
- struct legacy_slot *slot = kzalloc(sizeof(*slot), GFP_KERNEL);
-
- if (!slot)
- return -ENOMEM;
-
- if (kobject_init_and_add(&slot->kobj, &legacy_ktype,
- &pci_slots_kset->kobj, "%s",
- dev_name(&pdev->dev))) {
- dev_warn(&pdev->dev, "Failed to created legacy fake slot\n");
- return -EINVAL;
- }
- slot->dev = pci_dev_get(pdev);
-
- list_add(&slot->list, &legacy_list);
-
- return 0;
-}
-
-static int legacy_notify(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- struct pci_dev *pdev = to_pci_dev(data);
-
- if (action == BUS_NOTIFY_ADD_DEVICE) {
- legacy_add_slot(pdev);
- } else if (action == BUS_NOTIFY_DEL_DEVICE) {
- struct legacy_slot *slot;
-
- list_for_each_entry(slot, &legacy_list, list)
- if (slot->dev == pdev)
- goto found;
-
- dev_warn(&pdev->dev, "Missing legacy fake slot?");
- return -ENODEV;
-found:
- kobject_del(&slot->kobj);
- list_del(&slot->list);
- kobject_put(&slot->kobj);
- }
-
- return 0;
-}
-
-static struct notifier_block legacy_notifier = {
- .notifier_call = legacy_notify
-};
-
-static int __init init_legacy(void)
-{
- struct pci_dev *pdev = NULL;
-
- /* Add existing devices */
- for_each_pci_dev(pdev)
- legacy_add_slot(pdev);
-
- /* Be alerted of any new ones */
- bus_register_notifier(&pci_bus_type, &legacy_notifier);
- return 0;
-}
-module_init(init_legacy);
-
-static void __exit remove_legacy(void)
-{
- struct legacy_slot *slot, *tmp;
-
- bus_unregister_notifier(&pci_bus_type, &legacy_notifier);
-
- list_for_each_entry_safe(slot, tmp, &legacy_list, list) {
- list_del(&slot->list);
- kobject_del(&slot->kobj);
- kobject_put(&slot->kobj);
- }
-}
-module_exit(remove_legacy);
-
-
-MODULE_AUTHOR("Trent Piepho <xyzzy@speakeasy.org>");
-MODULE_DESCRIPTION("Legacy version of the fakephp interface");
-MODULE_LICENSE("GPL");
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