mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
![Yang Yingliang](/assets/img/avatar_default.png)
After commit1fa5ae857b
("driver core: get rid of struct device's bus_id string array"), the name of device is allocated dynamically, move dev_set_name() after pnp_add_id() to avoid memory leak. Fixes:1fa5ae857b
("driver core: get rid of struct device's bus_id string array") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Reviewed-by: Hanjun Guo <guohanjun@huawei.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
240 lines
4.9 KiB
C
240 lines
4.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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/mutex.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/dma-mapping.h>
|
|
|
|
#include "base.h"
|
|
|
|
static LIST_HEAD(pnp_protocols);
|
|
LIST_HEAD(pnp_global);
|
|
DEFINE_MUTEX(pnp_lock);
|
|
|
|
/*
|
|
* ACPI or PNPBIOS should tell us about all platform devices, so we can
|
|
* skip some blind probes. ISAPNP typically enumerates only plug-in ISA
|
|
* devices, not built-in things like COM ports.
|
|
*/
|
|
int pnp_platform_devices;
|
|
EXPORT_SYMBOL(pnp_platform_devices);
|
|
|
|
static void pnp_remove_protocol(struct pnp_protocol *protocol)
|
|
{
|
|
mutex_lock(&pnp_lock);
|
|
list_del(&protocol->protocol_list);
|
|
mutex_unlock(&pnp_lock);
|
|
}
|
|
|
|
/**
|
|
* pnp_register_protocol - 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)
|
|
{
|
|
struct list_head *pos;
|
|
int nodenum, ret;
|
|
|
|
INIT_LIST_HEAD(&protocol->devices);
|
|
INIT_LIST_HEAD(&protocol->cards);
|
|
nodenum = 0;
|
|
|
|
mutex_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++;
|
|
}
|
|
}
|
|
|
|
protocol->number = nodenum;
|
|
dev_set_name(&protocol->dev, "pnp%d", nodenum);
|
|
|
|
list_add_tail(&protocol->protocol_list, &pnp_protocols);
|
|
|
|
mutex_unlock(&pnp_lock);
|
|
|
|
ret = device_register(&protocol->dev);
|
|
if (ret)
|
|
pnp_remove_protocol(protocol);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* pnp_unregister_protocol - removes a pnp protocol from the pnp layer
|
|
* @protocol: pointer to the corresponding pnp_protocol structure
|
|
*/
|
|
void pnp_unregister_protocol(struct pnp_protocol *protocol)
|
|
{
|
|
pnp_remove_protocol(protocol);
|
|
device_unregister(&protocol->dev);
|
|
}
|
|
|
|
static void pnp_free_ids(struct pnp_dev *dev)
|
|
{
|
|
struct pnp_id *id;
|
|
struct pnp_id *next;
|
|
|
|
id = dev->id;
|
|
while (id) {
|
|
next = id->next;
|
|
kfree(id);
|
|
id = next;
|
|
}
|
|
}
|
|
|
|
void pnp_free_resource(struct pnp_resource *pnp_res)
|
|
{
|
|
list_del(&pnp_res->list);
|
|
kfree(pnp_res);
|
|
}
|
|
|
|
void pnp_free_resources(struct pnp_dev *dev)
|
|
{
|
|
struct pnp_resource *pnp_res, *tmp;
|
|
|
|
list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
|
|
pnp_free_resource(pnp_res);
|
|
}
|
|
}
|
|
|
|
static void pnp_release_device(struct device *dmdev)
|
|
{
|
|
struct pnp_dev *dev = to_pnp_dev(dmdev);
|
|
|
|
pnp_free_ids(dev);
|
|
pnp_free_resources(dev);
|
|
pnp_free_options(dev);
|
|
kfree(dev);
|
|
}
|
|
|
|
struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id,
|
|
const char *pnpid)
|
|
{
|
|
struct pnp_dev *dev;
|
|
struct pnp_id *dev_id;
|
|
|
|
dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
|
|
if (!dev)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&dev->resources);
|
|
INIT_LIST_HEAD(&dev->options);
|
|
dev->protocol = protocol;
|
|
dev->number = id;
|
|
dev->dma_mask = DMA_BIT_MASK(24);
|
|
|
|
dev->dev.parent = &dev->protocol->dev;
|
|
dev->dev.bus = &pnp_bus_type;
|
|
dev->dev.dma_mask = &dev->dma_mask;
|
|
dev->dev.coherent_dma_mask = dev->dma_mask;
|
|
dev->dev.release = &pnp_release_device;
|
|
|
|
dev_id = pnp_add_id(dev, pnpid);
|
|
if (!dev_id) {
|
|
kfree(dev);
|
|
return NULL;
|
|
}
|
|
|
|
dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number);
|
|
|
|
return dev;
|
|
}
|
|
|
|
static void pnp_delist_device(struct pnp_dev *dev)
|
|
{
|
|
mutex_lock(&pnp_lock);
|
|
list_del(&dev->global_list);
|
|
list_del(&dev->protocol_list);
|
|
mutex_unlock(&pnp_lock);
|
|
}
|
|
|
|
int __pnp_add_device(struct pnp_dev *dev)
|
|
{
|
|
int ret;
|
|
|
|
pnp_fixup_device(dev);
|
|
dev->status = PNP_READY;
|
|
|
|
mutex_lock(&pnp_lock);
|
|
|
|
list_add_tail(&dev->global_list, &pnp_global);
|
|
list_add_tail(&dev->protocol_list, &dev->protocol->devices);
|
|
|
|
mutex_unlock(&pnp_lock);
|
|
|
|
ret = device_register(&dev->dev);
|
|
if (ret)
|
|
pnp_delist_device(dev);
|
|
else if (dev->protocol->can_wakeup)
|
|
device_set_wakeup_capable(&dev->dev,
|
|
dev->protocol->can_wakeup(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)
|
|
{
|
|
int ret;
|
|
char buf[128];
|
|
int len = 0;
|
|
struct pnp_id *id;
|
|
|
|
if (dev->card)
|
|
return -EINVAL;
|
|
|
|
ret = __pnp_add_device(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
buf[0] = '\0';
|
|
for (id = dev->id; id; id = id->next)
|
|
len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id);
|
|
|
|
dev_dbg(&dev->dev, "%s device, IDs%s (%s)\n", dev->protocol->name, buf,
|
|
dev->active ? "active" : "disabled");
|
|
return 0;
|
|
}
|
|
|
|
void __pnp_remove_device(struct pnp_dev *dev)
|
|
{
|
|
pnp_delist_device(dev);
|
|
device_unregister(&dev->dev);
|
|
}
|
|
|
|
static int __init pnp_init(void)
|
|
{
|
|
return bus_register(&pnp_bus_type);
|
|
}
|
|
|
|
subsys_initcall(pnp_init);
|
|
|
|
int pnp_debug;
|
|
|
|
#if defined(CONFIG_PNP_DEBUG_MESSAGES)
|
|
module_param_named(debug, pnp_debug, int, 0644);
|
|
#endif
|