Fix oinkmaster patch.

[ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.arch / acpi-bay-remove-useless-code.patch

From: Shaohua Li <shaohua.li@intel.com>
Subject: remove useless code
Patch-mainline: submitted 2008-08-28
References: fate#304731,bnc#401740

Bay driver is replaced by dock driver, remove it.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Holger Macht <hmacht@suse.de>
---

--- linux-2.6.26.orig/drivers/acpi/bay.c	2008-07-13 23:51:29.000000000 +0200
+++ linux-2.6.26/drivers/acpi/bay.c	1970-01-01 01:00:00.000000000 +0100
@@ -1,411 +0,0 @@
-/*
- *  bay.c - ACPI removable drive bay driver
- *
- *  Copyright (C) 2006 Kristen Carlson Accardi <kristen.c.accardi@intel.com>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or (at
- *  your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful, but
- *  WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/notifier.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
-#include <linux/seq_file.h>
-#include <asm/uaccess.h>
-#include <linux/platform_device.h>
-
-ACPI_MODULE_NAME("bay");
-MODULE_AUTHOR("Kristen Carlson Accardi");
-MODULE_DESCRIPTION("ACPI Removable Drive Bay Driver");
-MODULE_LICENSE("GPL");
-#define ACPI_BAY_CLASS "bay"
-#define ACPI_BAY_COMPONENT	0x10000000
-#define _COMPONENT ACPI_BAY_COMPONENT
-#define bay_dprintk(h,s) {\
-	char prefix[80] = {'\0'};\
-	struct acpi_buffer buffer = {sizeof(prefix), prefix};\
-	acpi_get_name(h, ACPI_FULL_PATHNAME, &buffer);\
-	printk(KERN_DEBUG PREFIX "%s: %s\n", prefix, s); }
-static void bay_notify(acpi_handle handle, u32 event, void *data);
-
-static const struct acpi_device_id bay_device_ids[] = {
-	{"LNXIOBAY", 0},
-	{"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, bay_device_ids);
-
-struct bay {
-	acpi_handle handle;
-	char *name;
-	struct list_head list;
-	struct platform_device *pdev;
-};
-
-static LIST_HEAD(drive_bays);
-
-
-/*****************************************************************************
- *                         Drive Bay functions                               *
- *****************************************************************************/
-/**
- * is_ejectable - see if a device is ejectable
- * @handle: acpi handle of the device
- *
- * If an acpi object has a _EJ0 method, then it is ejectable
- */
-static int is_ejectable(acpi_handle handle)
-{
-	acpi_status status;
-	acpi_handle tmp;
-
-	status = acpi_get_handle(handle, "_EJ0", &tmp);
-	if (ACPI_FAILURE(status))
-		return 0;
-	return 1;
-}
-
-/**
- * bay_present - see if the bay device is present
- * @bay: the drive bay
- *
- * execute the _STA method.
- */
-static int bay_present(struct bay *bay)
-{
-	unsigned long long sta;
-	acpi_status status;
-
-	if (bay) {
-		status = acpi_evaluate_integer(bay->handle, "_STA", NULL, &sta);
-		if (ACPI_SUCCESS(status) && sta)
-			return 1;
-	}
-	return 0;
-}
-
-/**
- * eject_device - respond to an eject request
- * @handle - the device to eject
- *
- * Call this devices _EJ0 method.
- */
-static void eject_device(acpi_handle handle)
-{
-	struct acpi_object_list arg_list;
-	union acpi_object arg;
-
-	bay_dprintk(handle, "Ejecting device");
-
-	arg_list.count = 1;
-	arg_list.pointer = &arg;
-	arg.type = ACPI_TYPE_INTEGER;
-	arg.integer.value = 1;
-
-	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0",
-					      &arg_list, NULL)))
-		pr_debug("Failed to evaluate _EJ0!\n");
-}
-
-/*
- * show_present - read method for "present" file in sysfs
- */
-static ssize_t show_present(struct device *dev,
-			   struct device_attribute *attr, char *buf)
-{
-	struct bay *bay = dev_get_drvdata(dev);
-	return snprintf(buf, PAGE_SIZE, "%d\n", bay_present(bay));
-
-}
-static DEVICE_ATTR(present, S_IRUGO, show_present, NULL);
-
-/*
- * write_eject - write method for "eject" file in sysfs
- */
-static ssize_t write_eject(struct device *dev, struct device_attribute *attr,
-			   const char *buf, size_t count)
-{
-	struct bay *bay = dev_get_drvdata(dev);
-
-	if (!count)
-		return -EINVAL;
-
-	eject_device(bay->handle);
-	return count;
-}
-static DEVICE_ATTR(eject, S_IWUSR, NULL, write_eject);
-
-/**
- * is_ata - see if a device is an ata device
- * @handle: acpi handle of the device
- *
- * If an acpi object has one of 4 ATA ACPI methods defined,
- * then it is an ATA device
- */
-static int is_ata(acpi_handle handle)
-{
-	acpi_handle tmp;
-
-	if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
-	   (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
-	   (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
-	   (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
-		return 1;
-
-	return 0;
-}
-
-/**
- * parent_is_ata(acpi_handle handle)
- *
- */
-static int parent_is_ata(acpi_handle handle)
-{
-	acpi_handle phandle;
-
-	if (acpi_get_parent(handle, &phandle))
-		return 0;
-
-	return is_ata(phandle);
-}
-
-/**
- * is_ejectable_bay - see if a device is an ejectable drive bay
- * @handle: acpi handle of the device
- *
- * If an acpi object is ejectable and has one of the ACPI ATA
- * methods defined, then we can safely call it an ejectable
- * drive bay
- */
-static int is_ejectable_bay(acpi_handle handle)
-{
-	if ((is_ata(handle) || parent_is_ata(handle)) && is_ejectable(handle))
-		return 1;
-	return 0;
-}
-
-#if 0
-/**
- * eject_removable_drive - try to eject this drive
- * @dev : the device structure of the drive
- *
- * If a device is a removable drive that requires an _EJ0 method
- * to be executed in order to safely remove from the system, do
- * it.  ATM - always returns success
- */
-int eject_removable_drive(struct device *dev)
-{
-	acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
-
-	if (handle) {
-		bay_dprintk(handle, "Got device handle");
-		if (is_ejectable_bay(handle))
-			eject_device(handle);
-	} else {
-		printk("No acpi handle for device\n");
-	}
-
-	/* should I return an error code? */
-	return 0;
-}
-EXPORT_SYMBOL_GPL(eject_removable_drive);
-#endif  /*  0  */
-
-static int acpi_bay_add_fs(struct bay *bay)
-{
-	int ret;
-	struct device *dev = &bay->pdev->dev;
-
-	ret = device_create_file(dev, &dev_attr_present);
-	if (ret)
-		goto add_fs_err;
-	ret = device_create_file(dev, &dev_attr_eject);
-	if (ret) {
-		device_remove_file(dev, &dev_attr_present);
-		goto add_fs_err;
-	}
-	return 0;
-
- add_fs_err:
-	bay_dprintk(bay->handle, "Error adding sysfs files\n");
-	return ret;
-}
-
-static void acpi_bay_remove_fs(struct bay *bay)
-{
-	struct device *dev = &bay->pdev->dev;
-
-	/* cleanup sysfs */
-	device_remove_file(dev, &dev_attr_present);
-	device_remove_file(dev, &dev_attr_eject);
-}
-
-static int bay_is_dock_device(acpi_handle handle)
-{
-	acpi_handle parent;
-
-	acpi_get_parent(handle, &parent);
-
-	/* if the device or it's parent is dependent on the
-	 * dock, then we are a dock device
-	 */
-	return (is_dock_device(handle) || is_dock_device(parent));
-}
-
-static int bay_add(acpi_handle handle, int id)
-{
-	acpi_status status;
-	struct bay *new_bay;
-	struct platform_device *pdev;
-	struct acpi_buffer nbuffer = {ACPI_ALLOCATE_BUFFER, NULL};
-	acpi_get_name(handle, ACPI_FULL_PATHNAME, &nbuffer);
-
-	bay_dprintk(handle, "Adding notify handler");
-
-	/*
-	 * Initialize bay device structure
-	 */
-	new_bay = kzalloc(sizeof(*new_bay), GFP_ATOMIC);
-	INIT_LIST_HEAD(&new_bay->list);
-	new_bay->handle = handle;
-	new_bay->name = (char *)nbuffer.pointer;
-
-	/* initialize platform device stuff */
-	pdev = platform_device_register_simple(ACPI_BAY_CLASS, id, NULL, 0);
-	if (IS_ERR(pdev)) {
-		printk(KERN_ERR PREFIX "Error registering bay device\n");
-		goto bay_add_err;
-	}
-	new_bay->pdev = pdev;
-	platform_set_drvdata(pdev, new_bay);
-
-	/*
-	 * we want the bay driver to be able to send uevents
-	 */
-	pdev->dev.uevent_suppress = 0;
-
-	/* register for events on this device */
-	status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
-			bay_notify, new_bay);
-	if (ACPI_FAILURE(status)) {
-		printk(KERN_INFO PREFIX "Error installing bay notify handler\n");
-		platform_device_unregister(new_bay->pdev);
-		goto bay_add_err;
-	}
-
-	if (acpi_bay_add_fs(new_bay)) {
-		acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
-					   bay_notify);
-		platform_device_unregister(new_bay->pdev);
-		goto bay_add_err;
-	}
-
-	/* if we are on a dock station, we should register for dock
-	 * notifications.
-	 */
-	if (bay_is_dock_device(handle)) {
-		bay_dprintk(handle, "Is dependent on dock\n");
-		register_hotplug_dock_device(handle, bay_notify, new_bay);
-	}
-	list_add(&new_bay->list, &drive_bays);
-	printk(KERN_INFO PREFIX "Bay [%s] Added\n", new_bay->name);
-	return 0;
-
-bay_add_err:
-	kfree(new_bay->name);
-	kfree(new_bay);
-	return -ENODEV;
-}
-
-/**
- * bay_notify - act upon an acpi bay notification
- * @handle: the bay handle
- * @event: the acpi event
- * @data: our driver data struct
- *
- */
-static void bay_notify(acpi_handle handle, u32 event, void *data)
-{
-	struct bay *bay_dev = (struct bay *)data;
-	struct device *dev = &bay_dev->pdev->dev;
-	char event_string[12];
-	char *envp[] = { event_string, NULL };
-
-	bay_dprintk(handle, "Bay event");
-	sprintf(event_string, "BAY_EVENT=%d", event);
-	kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
-}
-
-static acpi_status
-find_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
-{
-	int *count = (int *)context;
-
-	/*
-	 * there could be more than one ejectable bay.
-	 * so, just return AE_OK always so that every object
-	 * will be checked.
-	 */
-	if (is_ejectable_bay(handle)) {
-		bay_dprintk(handle, "found ejectable bay");
-		if (!bay_add(handle, *count))
-			(*count)++;
-	}
-	return AE_OK;
-}
-
-static int __init bay_init(void)
-{
-	int bays = 0;
-
-	INIT_LIST_HEAD(&drive_bays);
-
-	if (acpi_disabled)
-		return -ENODEV;
-
-	/* look for dockable drive bays */
-	acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
-		ACPI_UINT32_MAX, find_bay, &bays, NULL);
-
-	if (!bays)
-		return -ENODEV;
-
-	return 0;
-}
-
-static void __exit bay_exit(void)
-{
-	struct bay *bay, *tmp;
-
-	list_for_each_entry_safe(bay, tmp, &drive_bays, list) {
-		if (is_dock_device(bay->handle))
-			unregister_hotplug_dock_device(bay->handle);
-		acpi_bay_remove_fs(bay);
-		acpi_remove_notify_handler(bay->handle, ACPI_SYSTEM_NOTIFY,
-			bay_notify);
-		platform_device_unregister(bay->pdev);
-		kfree(bay->name);
-		kfree(bay);
-	}
-}
-
-postcore_initcall(bay_init);
-module_exit(bay_exit);
-