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linux-next/drivers/pnp/core.c
Adrian Bunk b449f63c8c [PATCH] drivers/pnp/: cleanups
This patch contains the following possible cleanups:
- make needlessly global code static
- #if 0 the following unused global function:
  - core.c: pnp_remove_device
- #if 0 the following unneeded EXPORT_SYMBOL's:
  - card.c: pnp_add_card
  - card.c: pnp_remove_card
  - card.c: pnp_add_card_device
  - card.c: pnp_remove_card_device
  - card.c: pnp_add_card_id
  - core.c: pnp_register_protocol
  - core.c: pnp_unregister_protocol
  - core.c: pnp_add_device
  - core.c: pnp_remove_device
  - pnpacpi/core.c: pnpacpi_protocol
  - driver.c: pnp_add_id
  - isapnp/core.c: isapnp_read_byte
  - manager.c: pnp_auto_config_dev
  - resource.c: pnp_register_dependent_option
  - resource.c: pnp_register_independent_option
  - resource.c: pnp_register_irq_resource
  - resource.c: pnp_register_dma_resource
  - resource.c: pnp_register_port_resource
  - resource.c: pnp_register_mem_resource

Note that this patch #if 0's exactly one functions and removes no
functions.  Most it does is the #if 0 of EXPORT_SYMBOL's, so if any modular
code will use any of them, re-adding will be trivial.

Modular ISAPnP might be interesting in some cases, but this is more legacy
code.  If someone would work on it to sort all the issues out (starting
with the point that most users of __ISAPNP__ will have to be fixed)
re-enabling the required EXPORT_SYMBOL's won't be hard for him.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Adam Belay <ambx1@neo.rr.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 07:54:09 -08:00

184 lines
3.8 KiB
C

/*
* core.c - contains all core device and protocol registration functions
*
* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
*
*/
#include <linux/pnp.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include "base.h"
static LIST_HEAD(pnp_protocols);
LIST_HEAD(pnp_global);
DEFINE_SPINLOCK(pnp_lock);
void *pnp_alloc(long size)
{
void *result;
result = kmalloc(size, GFP_KERNEL);
if (!result){
printk(KERN_ERR "pnp: Out of Memory\n");
return NULL;
}
memset(result, 0, size);
return result;
}
/**
* pnp_protocol_register - adds a pnp protocol to the pnp layer
* @protocol: pointer to the corresponding pnp_protocol structure
*
* Ex protocols: ISAPNP, PNPBIOS, etc
*/
int pnp_register_protocol(struct pnp_protocol *protocol)
{
int nodenum;
struct list_head * pos;
if (!protocol)
return -EINVAL;
INIT_LIST_HEAD(&protocol->devices);
INIT_LIST_HEAD(&protocol->cards);
nodenum = 0;
spin_lock(&pnp_lock);
/* assign the lowest unused number */
list_for_each(pos,&pnp_protocols) {
struct pnp_protocol * cur = to_pnp_protocol(pos);
if (cur->number == nodenum){
pos = &pnp_protocols;
nodenum++;
}
}
list_add_tail(&protocol->protocol_list, &pnp_protocols);
spin_unlock(&pnp_lock);
protocol->number = nodenum;
sprintf(protocol->dev.bus_id, "pnp%d", nodenum);
return device_register(&protocol->dev);
}
/**
* pnp_protocol_unregister - removes a pnp protocol from the pnp layer
* @protocol: pointer to the corresponding pnp_protocol structure
*
*/
void pnp_unregister_protocol(struct pnp_protocol *protocol)
{
spin_lock(&pnp_lock);
list_del(&protocol->protocol_list);
spin_unlock(&pnp_lock);
device_unregister(&protocol->dev);
}
static void pnp_free_ids(struct pnp_dev *dev)
{
struct pnp_id * id;
struct pnp_id * next;
if (!dev)
return;
id = dev->id;
while (id) {
next = id->next;
kfree(id);
id = next;
}
}
static void pnp_release_device(struct device *dmdev)
{
struct pnp_dev * dev = to_pnp_dev(dmdev);
pnp_free_option(dev->independent);
pnp_free_option(dev->dependent);
pnp_free_ids(dev);
kfree(dev);
}
int __pnp_add_device(struct pnp_dev *dev)
{
int ret;
pnp_fixup_device(dev);
dev->dev.bus = &pnp_bus_type;
dev->dev.release = &pnp_release_device;
dev->status = PNP_READY;
spin_lock(&pnp_lock);
list_add_tail(&dev->global_list, &pnp_global);
list_add_tail(&dev->protocol_list, &dev->protocol->devices);
spin_unlock(&pnp_lock);
ret = device_register(&dev->dev);
if (ret == 0)
pnp_interface_attach_device(dev);
return ret;
}
/*
* pnp_add_device - adds a pnp device to the pnp layer
* @dev: pointer to dev to add
*
* adds to driver model, name database, fixups, interface, etc.
*/
int pnp_add_device(struct pnp_dev *dev)
{
if (!dev || !dev->protocol || dev->card)
return -EINVAL;
dev->dev.parent = &dev->protocol->dev;
sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number, dev->number);
return __pnp_add_device(dev);
}
void __pnp_remove_device(struct pnp_dev *dev)
{
spin_lock(&pnp_lock);
list_del(&dev->global_list);
list_del(&dev->protocol_list);
spin_unlock(&pnp_lock);
device_unregister(&dev->dev);
}
/**
* pnp_remove_device - removes a pnp device from the pnp layer
* @dev: pointer to dev to add
*
* this function will free all mem used by dev
*/
#if 0
void pnp_remove_device(struct pnp_dev *dev)
{
if (!dev || dev->card)
return;
__pnp_remove_device(dev);
}
#endif /* 0 */
static int __init pnp_init(void)
{
printk(KERN_INFO "Linux Plug and Play Support v0.97 (c) Adam Belay\n");
return bus_register(&pnp_bus_type);
}
subsys_initcall(pnp_init);
#if 0
EXPORT_SYMBOL(pnp_register_protocol);
EXPORT_SYMBOL(pnp_unregister_protocol);
EXPORT_SYMBOL(pnp_add_device);
EXPORT_SYMBOL(pnp_remove_device);
#endif /* 0 */